A slewing pedestal for the Ø90 bore at a fixed site. A two-axis head carrying tube pods and Canadian Shield's own sensor head, on a cabinet pedestal that holds the power, the control and the wired network, firing the Goose-family rounds off the Launch Platform's pneumatic chain.
One tube module, one bore, one charge pressure and one stroke, carried on a two-axis pedestal head with the sensing, the interlocks, the structure and the network a fixed site needs.
The launch energy is compressed air. There is no warhead, no fuze, no primer, no propellant and no energetic material on the mount or in any round it fires. The round is a carrier, and it stays one in every option on it.
Eight permissives stand in series ahead of the arm relay, and a ninth at a site that requires canopy rounds. The relay drops when the fire command completes, so the key is turned again for the next shot and the mount returns to SAFE between shots. A cue proposes; it never authorizes.
Detect, track, classify and cue are Canadian Shield's own, on a sensor head that is passive but for an eye-safe rangefinder under emission control. No copper leaves the head except its supply and its bond, and there is no external data port on the mount.
A shot puts up to 3,274 N·m of yaw on a centred pod, orders above any laying torque. Both axis brakes are engaged before the breech may open, and they are sized at twice the worst torque of the configuration fitted.
The design definition works every result across pod options of 6, 9, 12 and 16 tubes and rules none of them. Where a figure changes with the pod, all four are given.
The tube moduleThe launch case, per barrelLoads into the mount, per barrelDynamic response of the structurePedestal geometryMass, by pod optionInertia, brakes and the shotThe laying envelope and its limitsThe interlock chainAir, stored energy and the vesselPower and the networkThe sensor headEnvironment, structure and the siteAnti-tamper and site securitySustainment
| Parameter | Value | Basis |
|---|---|---|
| Bore | Ø90.00 mm | design value, unchanged from the Launch Platform |
| Bore area | 63.617 cm² | calculated from the Ø90 bore |
| Stroke | 3,000 mm | design value |
| Barrel length | About 3,500 mm | the 3.00 m stroke plus the breech length, which the shop drawing set assumes at 500 mm |
| Barrel stock | Drawn-over-mandrel steel tube without a weld seam, to ASTM A519, AISI 4130 or equivalent | the shop drawing's general notes |
| Barrel wall and proof test | At least 6 mm, proof tested at 45 bar | the shop drawing's general notes |
| Tube outside diameter | Ø102 mm | calculated: Ø90 + 2 × 6 mm of wall |
| Pod pitch | At least about 110 to 130 mm | calculated from the Ø102 mm tube with clamp clearance |
| Tube clamping | Clamps and cradle, at a safety factor of at least 2.0 on the 9,546 N mean base force | the shop drawing, carried into the pod interface |
| Breech valve | Normally closed solenoid, energize to open, one per barrel, rated 30 bar, port at least 95 cm² | the Launch Platform design definition |
| Valve opening time | <5 ms | the Launch Platform design definition |
| Rounds | Goose CS-110 and Encapsulator CS-111, both 1.600 kg, unchanged | a requirement of the design definition; design value for the mass |
| Mixed loads | Allowed: both rounds share one envelope, one mass and one indexing | the Encapsulator systems package, carried into the mount |
| Barrels fired | One at a time; one solenoid energized at a time | the pneumatic schematic's solenoid note |
| Power or signal to the round | None; the rounds are unpowered | a requirement of the design definition |
| Parameter | Value | Basis |
|---|---|---|
| Charge pressure | 30 bar, shop-air class | design value |
| Ambient pressure in the load case | 1.013 bar | the round's design definition |
| Round mass | 1.600 kg | design value |
| Obturator seal drag | 250 N | the round's design definition, carried into the load case |
| Velocity at the muzzle | 189.2 m/s | design value, interior ballistics |
| Muzzle energy | 28.64 kJ | calculated: ½mv² |
| Peak acceleration of the round | 11,369 m/s², or 1,159 g, at t = 0.14 ms | the round's design definition, at the start of the stroke |
| Mean acceleration | 5,966 m/s², or 608 g | the round's design definition |
| Time in the barrel | 31.7 ms | calculated on constant acceleration: 2S ÷ v |
| Parameter | Value | Basis |
|---|---|---|
| Gas load on the breech | 18,441 N | calculated: (30 − 1.013) bar across the bore area |
| Peak net reaction into the mount | 18,191 N | calculated: the gas load less the seal drag; it reproduces the source's peak base force |
| Mean base force over the stroke | 9,546 N | calculated: ½mv² ÷ stroke |
| In-bore impulse | 357.3 N·s | calculated: the round's momentum plus the charge gas's momentum in the bore |
| Equivalent static load, first sizing | 36,382 N | calculated: 2.0 × the peak reaction, for a step-applied load |
| Factored load for member checks | 72,764 N | calculated: the equivalent static load with a safety factor of 2.0 on top |
| Reaction at −3° and 0° elevation | 18,166 N horizontal with 952 N up; 18,191 N horizontal | calculated from the reaction along the bore |
| Reaction at 45° and +75° | 12,863 N each way; 4,708 N horizontal with 17,571 N down | calculated; overturning is worst at low elevation |
| Base overturning moment | 110.3 kN·m per barrel | calculated: the equivalent static load at the modelled 3.032 m trunnion height, at 0° |
| Anchor load | About 68.9 kN per anchor | calculated on an illustrative eight anchors on a 0.8 m bolt circle, before dead-load relief; the anchor design is the structural engineer's |
| Yaw torque on the azimuth axis | 9.1 kN·m | calculated at an illustrative 0.5 m lateral offset of the bore line, at 0° |
| Torque on the elevation axis | 2,365 N·m | calculated at one row pitch, 130 mm, off the trunnion axis |
| Fatigue | The shot count over the mount's life is set per site; anchor preload is checked for load reversal | the design definition's fatigue note |
| Parameter | Value | Basis |
|---|---|---|
| Modelled first bending mode | 22.8 to 34.6 Hz across the 6 to 16-tube pod options | calculated by hand on a uniform-cantilever model carrying the rotating mass at the trunnion |
| Corresponding periods | 28.9 to 43.8 ms | calculated |
| The shot against the period | The peak arrives in 0.3 % to 0.5 % of a cycle | calculated; to the first mode the shot is a step |
| Dynamic load factor | 1.55 to 1.74 undamped; 1.50 to 1.69 at 2 % damping | calculated by driving a single-degree-of-freedom oscillator with the published force history |
| Step factor carried | 2.0 | the design definition carries it until a modal analysis replaces it; it holds 15 % to 29 % over the first mode |
| Axial wave in the barrel steel | 5,048 m/s, crossing a 3.5 m barrel in 0.69 ms | calculated; longer than the 0.14 ms rise, so the barrel does not respond as a lumped mass |
| Roof stool, for comparison | 33.8 to 51.7 Hz on a 0.60 m stool | calculated; it is not a building's own first frequency, which belongs to the building's engineer of record |
| What the hand estimate does not cover | Local modes, the slewing bearing's flexibility and clearance, base and foundation flexibility, the barrel as a wave-bearing member, and measured damping | the design definition names all five |
| Parameter | Value | Basis |
|---|---|---|
| Balance point | 1.46 m forward of the breech face | calculated by taking moments about the pivot; the head balances there with no counterweight |
| Balance against tube count | It does not move: every tube carries the same masses at the same stations | calculated |
| Breech drop at +75° | 1.41 m | calculated from the balance point |
| Trunnion above the slewing ring | 1.66 m | calculated, with 0.25 m of clearance under the breech and manifold |
| Trunnion above the base plane | 3.03 m | calculated, from the modelled column and the base and bearing stack |
| Muzzle height at +75° | 5.00 m above the base plane; the pod top sits about 3.29 m up at 0° with 16 tubes | calculated, from 2.04 m of barrel forward of the trunnion |
| If the pivot is moved to 0.8 m | 513 N·m per tube out of balance, needing 392 kg of counterweight at 6 tubes and 1,047 kg at 16 | calculated, for a counterweight 0.8 m aft of the trunnion |
| Balancer | A spring balancer where the pivot is moved; a gas strut is not proposed, because it is one more pressure device at the site | the design definition's balance study |
| Slewing bearing | Four-point-contact ball or crossed-roller, selected against the tilting moment plus the dead-load moments of an overhung pod | the design definition |
| Construction | A steel weldment to CSA S16, welds to CSA W59 | the design basis named in the design definition and the shop drawing |
| Cabinet contents | Disconnect, supply and uninterruptible supply; the controller; the fibre terminations; the track and cue computer | the design definition |
| Parameter | Value | Basis |
|---|---|---|
| The configuration these masses describe | A single centred pod on 3,500 mm barrels, ready rounds in the tubes, a shared head plenum and a bolted plinth | the mass ledger's stated configuration |
| Barrels | 298 / 448 / 597 / 796 kg at 6 / 9 / 12 / 16 tubes | calculated, from the mass ledger |
| Breeches, valves and manifold | 72 / 108 / 144 / 192 kg | calculated, from the mass ledger |
| Pod cradle and clamps | 104 / 157 / 209 / 278 kg | calculated, from the mass ledger |
| Head frame, trunnions, balancer, elevation drive and brake | 134 / 201 / 269 / 358 kg | calculated, from the mass ledger |
| Ready rounds in the tubes | 10 / 14 / 19 / 26 kg | calculated at 1.600 kg per round |
| Rotating mass | 648 / 958 / 1,267 / 1,679 kg | calculated, from the mass ledger |
| Slewing bearing, azimuth drive and brake | 168 / 190 / 213 / 235 kg | calculated, from the mass ledger |
| Pedestal: plate, stiffeners, column and cabinet fit-out | 575 kg on every pod option | calculated, from the mass ledger |
| Mount, less the bank and the compressor | 1,392 / 1,723 / 2,055 / 2,489 kg | calculated, from the mass ledger |
| Centre of mass above the base plane | 1.76 / 1.98 / 2.13 / 2.27 m | calculated, with the bank and the compressor in a separate enclosure at grade |
| Base, as steel | 225 kg bolted plinth; 244 kg embedded socket, Ø700 × 12 mm and 1.2 m deep; 180 kg on four legs | calculated, from the mass ledger; concrete and ballast are not machine mass |
| One barrel tube | 49.7 kg at 3,500 mm; 42.6 kg at 3,000 mm | calculated from the steel section; four of the shorter tubes reproduce the shop drawing's 170 kg |
| The one check on the model | The reference four-tube system rebuilds at 673 kg against about 640 kg published, +5.1 % | calculated; it is the only check the model has, and nothing has been weighed |
| Parameter | Value | Basis |
|---|---|---|
| Azimuth moment of inertia | 646 / 969 / 1,303 / 1,738 kg·m² at 6 / 9 / 12 / 16 tubes | calculated, from the inertia ledger |
| Elevation moment of inertia | 642 / 969 / 1,292 / 1,738 kg·m² | calculated, from the inertia ledger |
| Twin pods at an illustrative ±0.5 m | Azimuth moment 2,054 kg·m² on twin 8-tube pods | calculated: each pod's mass moved out to ±0.5 m |
| Worst bore-line offset from the azimuth axis | 0.120 m at 6 and 9 tubes; 0.180 m at 12 and 16 | calculated from the pod array on a 120 mm pitch |
| Shot yaw torque, single centred pod | 2,183 N·m at 6 and 9 tubes; 3,274 N·m at 12 and 16 | calculated: the peak reaction on the worst offset at 0° |
| Shot pitch torque, single centred pod | 1,091 / 2,183 / 2,183 / 3,274 N·m | calculated |
| Shot yaw torque, twin 8-tube pods at 0.5 m | 12,370 N·m, on a 0.680 m worst offset | calculated |
| Design brake torque | 4.4 kN·m at 6 and 9 tubes; 6.5 kN·m at 12 and 16; 24.7 kN·m on twin 8-tube pods | a requirement: 2.0 × the worst torque of the configuration fitted |
| Brakes | Spring-applied on both axes; the fire command waits on both of them engaged | a requirement of the design definition |
| Head rotation if a brake let go for one shot | 3.8°/s at 6 tubes; 2.1°/s at 16, which is well under a tenth of a degree while the round is in the bore | calculated from the in-bore angular impulse; a brake is sized on torque, not on rotation |
| Stow | A sensed stow lock pins the head at a stow attitude whenever the mount is SAFE and unattended | a requirement of the design definition |
| Parameter | Value | Basis |
|---|---|---|
| Azimuth | ±170° | a requirement: no wider than the reference envelope, and narrowed per site in hardware |
| Elevation | −3° to +75° | a requirement: no wider than the reference envelope, and narrowed per site in hardware |
| Continuous rotation | Not carried; the azimuth is the reference envelope | the design definition |
| Limit, first layer | Mechanical hard stops at the fixed limits | the design definition |
| Limit, second layer | Cam-operated limit switches on both axes, wired into the sector permissive ahead of the arm relay | the design definition |
| The cam set | Site hardware, cut from the site's surveyed footprint map, sealed and recorded, changed only under a controlled procedure | the design definition and the safety case |
| Limit, third layer | A laying solution outside the envelope is refused before the drives move | the published Launch Platform sheet |
| Limit, fourth layer | The site no-fire map, loaded into the laying software as a cross-check; it never replaces the cam switches | the design definition |
| Boresight and level | The sensor head is boresighted to the barrels against a stored offset; a tilt switch confirms the base is within tolerance before the mount will arm | the design definition; the published Launch Platform sheet |
| Parameter | Value | Basis |
|---|---|---|
| Inherited permissives | Four in series ahead of the arm relay: a dual-channel emergency stop, an area-clear key, a muzzle-cover switch and a relief-proven switch | the launcher electrical schematic |
| Added by this line | Four more, all hard-wired: sector permitted, enclosure closed, base level and wind within limit, with a fifth — round type permitted — at a site that requires canopy rounds | new in the design definition |
| Arm permissives in series | Eight; nine at a site that requires canopy rounds | counted: the four inherited plus the four added, and the round-type permissive where the site requires it |
| Fire permissive | Both axis brakes engaged before the breech may open | new in the design definition |
| One shot per arm action | The arm relay drops when the fire command completes; the key is turned again for the next shot | a requirement of the design definition |
| State after a shot | SAFE | a requirement of the design definition |
| Fire command | A local operator action at the operator station only | a requirement of the design definition |
| The cue's authority | A permissive only; no fire command crosses the cue interface | a requirement of the design definition |
| Automated or remote-only fire path | None; the cue interface is capped in the controller specification | a requirement of the design definition |
| Fail direction | Any loss of power, bus, arm relay or interlock returns the mount to SAFE with the breech closed; the watchdog de-energizes every output | a requirement of the design definition |
| The safety chain | Hard-wired and dual-channel; never on a network | a requirement of the design definition |
| Where the operator station stands | Inside the site's secure area, with a direct view of the mount and its engagement sector, joined to the arm relay by a hard-wired dual-channel loop. A second emergency stop stays at the mount. | the design definition's proposed meaning of a local fire command; the launcher electrical schematic |
| Arming from the network | No workstation elsewhere can arm or fire; site security sees video and status only | a requirement of the design definition |
| Event record | Every arm, fire and fault recorded with time, operator and imagery, and not editable in the field | a requirement of the design definition |
| Energetic material | None, on the mount or in any round it fires | a requirement of the design definition; the schematic's safety-function summary |
| Parameter | Value | Basis |
|---|---|---|
| Working pressure | 30 bar | design value |
| Relief valve | 33 bar set point, 110 % of working pressure, sized for full compressor flow and proven by a switch in the arm chain | the pneumatic schematic; a requirement of the design definition |
| Relief and vent discharge | Routed clear of people and of the building's air intakes | the pneumatic schematic, carried into the roof interface |
| Instrumentation | A 0 to 40 bar transmitter on the bank to the controller, and a local glycerine-filled gauge | the pneumatic schematic |
| Isolation, vent and drain | A lockable manual isolation valve at the bank outlet, and a manual vent and drain at the low point; the bank is ventable to zero | the pneumatic schematic; a requirement of the design definition |
| Check valve | At the compressor discharge, to prevent backflow | the pneumatic schematic |
| Air dryer | Upstream of the bank, with a dew point below the site minimum | a requirement of the design definition |
| Pressure vessel | A certified, registered vessel | a requirement of the design definition |
| Registration | A Canadian Registration Number on the vessel and on the relief device, registration of the assembled piping, inspection at installation and periodic in-service inspection | the pneumatic schematic's pressure-equipment note |
| Stored energy in a charged bank | 4.66 kJ per litre at 30 bar | calculated: the adiabatic expansion energy; the formula reproduces the reference bank's published figure |
| Where the bank and compressor stand | In the pedestal, or in a separate enclosure at grade, which is expected for the heat and the noise | the design definition |
| Compressor | Electric, 17 kW shaft power | calculated from the pneumatic work in the Launch Platform design definition |
| Lockout | Every energy source lockable: the main disconnect, the compressor, the isolation valve, the vent and the gauge | a requirement of the design definition |
| Charging | Nobody is inside the charging zone while the bank comes up to pressure | the inherited safety and exclusion-zone data sheet |
| Parameter | Value | Basis |
|---|---|---|
| Compressor supply | Three-phase; the reference design is drawn to 480 V | the launcher electrical schematic |
| Site supply | Specified per site: Canadian institutional sites commonly carry 600 V or 208 V three-phase, and many sites abroad run at 50 Hz | the design definition |
| Compressor current | About 24 A full-load amperes at 480 V | the inherited load analysis |
| Control bus | 24 VDC, physically segregated from the three-phase side | a requirement of the design definition |
| Voltage-drop limit on the control bus | 3 % | a requirement: sized to the fitted configuration at the corrected conductor resistance |
| Uninterruptible supply | On the 24 VDC bus; it carries an orderly return to SAFE and keeps the sensor head running on loss of supply | the design definition |
| Loss of power | Safe regardless: the breech is normally closed | a requirement of the design definition |
| Electrical installation | To CSA C22.1, with surge protection on every copper entry and the protective bond tied to the building's grounding and lightning protection | a requirement of the design definition; the Launch Platform design definition |
| Control link | CAN 2.0B, point to point from the controller to the operator station, over fibre beyond the copper run | the controller specification; the design definition |
| Video and track | Ethernet over fibre, segregated, one way and view only to site security | a requirement of the design definition |
| Cybersecurity design basis | IEC 62443, named as a design basis | the design definition |
| External data ports | None on the mount; the cue interface is physically capped when not in use | the design definition |
| Enclosure | IP65, heated and cooled across the environmental range, with that load on the alternating-current side rather than the control bus | a requirement of the design definition, and a design choice it records |
| Parameter | Value | Basis |
|---|---|---|
| What it does | Detects, tracks, classifies and ranges, and passes bearing, range and height to the laying solution | a requirement of the design definition |
| Who builds it | Canadian Shield, in-house | the owner's ruling of 2026-09-11 |
| Day channel | A day camera with zoom, for identification | the design definition's sensor head |
| Night channel | A long-wave infrared thermal imager, for night detection and track | the design definition's sensor head |
| Rangefinder | An eye-safe laser rangefinder, in a band above 1.4 µm where the retina is not the limiting tissue | the design definition's sensor head |
| Rangefinder class | Class 1 at the aperture to IEC 60825-1, classified by an accredited laboratory | a requirement; an eye-safe wavelength is not the same as Class 1, and the class is the laboratory's to settle |
| Wide channel | A wide-field situational camera, for the near zone and the key holder's view | the design definition's sensor head |
| Optional channel | A passive acoustic array, for bearing-only cueing that tells the optics where to look | the design definition's sensor head |
| Not carried | Radar, a radio-frequency detector, a GNSS receiver and an antenna | a requirement of the design definition |
| Aperture rule | Every channel's clear aperture is at least 1.22 λ ÷ IFOV, so its detector and not diffraction sets its resolution | a requirement of the design definition |
| Emission control | The rangefinder emits on the operator's command or on an active track only, and is interlocked off when the stow lock is in | the design definition's sensor head |
| Links off the head | Fibre. No copper leaves the sensor head but its supply and its protective bond. | a requirement of the design definition |
| Time | From the site network by IEEE 1588, or from the cabinet's own clock. There is no GNSS aboard. | the design definition's sensor head |
| Detection range | None is given on this sheet | no measured range exists; the figures the design definition works are limits set by optics, and it says in terms that they are not detection ranges |
| What the doctrine costs | Detection is limited by fog, snow and rain, and without radio-frequency detection there is no warning of a drone before it can be seen | the design definition's sensor head |
| Mounting and search | Co-mounted and boresighted to the barrels, which stops it watching while the mount lays, or on its own mast, which keeps it watching at the cost of a second gimbal | the design definition's search study |
| Parameter | Value | Basis |
|---|---|---|
| Low-temperature design case | −30 °C | the round family's environmental design case |
| Upper temperature | Set per site | a requirement of the design definition, where the upper end is assumed to cover southern Canadian summers with solar gain |
| Condensate | Compressed air carries water that freezes at −30 °C; a dryer and drains are required | the design definition |
| Foundation and roof interface | Designed by a structural engineer licensed where the site is | a requirement of the design definition |
| Design basis | The National Building Code of Canada as the province adopts it; the anchorage provisions of CSA A23.3 for the loads above including reversal; CSA S16 and CSA W59; CSA C22.1 | the design bases named in the design definition and the shop drawing |
| Geotechnical | The pier or plinth is sized for overturning and lateral soil capacity from a geotechnical report; frost depth and seismic design are site-specific | the design definition |
| Environmental loads | Wind on the head and pods, snow and ice, drift, seismic and thermal, all to the National Building Code as adopted for the site | the design definition |
| Site acceptance | No mount is armed at a site without a surveyed footprint and a sector cam set cut for that site | a requirement of the design definition and of the safety case |
| Permits | A building permit and the building official's review, and provincial pressure-equipment registration | the design definition's roof interface and the pneumatic schematic's note |
| Parameter | Value | Basis |
|---|---|---|
| Arming | The arm key under key control, with a two-person rule optional. There is no arm path from the network, and no remote fire path to attack. | the design definition's anti-tamper table |
| Doors and covers | Tamper switches on every door and pod cover. Opening one drops the arm relay, latches FAULT and alarms to site security over a wired input. | the design definition's anti-tamper table |
| Fasteners and anchors | Security fasteners throughout; the embedded base, or a locked anchor shroud with tamper-evident marks on the nuts | the design definition's anti-tamper table |
| Rounds | A locked magazine, or ready rounds behind a locked and sensed pod cover, counted at every watch change | the design definition's anti-tamper table |
| Stored air | The isolation valve lockable, and the bank vented when the mount is unattended where the site rules for charge-on-watch | the design definition's anti-tamper table |
| Reach and climbing | Anything within reach is anti-climb and carries no ligature point | a requirement of the design definition for sites where it applies |
| Cam set | Sealed, recorded, and changed only under a controlled procedure | the design definition |
| Parameter | Value | Basis |
|---|---|---|
| Each use | Interlocks, emergency stop and breech fail-closed | the inherited maintenance schedule |
| Monthly and quarterly | Harness and slew checks monthly; compressor service and breech seal inspection quarterly | the inherited maintenance schedule |
| Breech seals | Logged by shot count | the inherited maintenance schedule |
| Per certificate | Vessel hydrotest and relief proof; a lapsed certificate takes the mount out of service | the inherited maintenance schedule |
| Added for this line | Sensor window cleaning; dryer and desiccant service; cam-set inspection and seal check; anchor preload check; foundation and roof-penetration inspection; brake holding test; tilt-switch check; uninterruptible-supply test | new in the design definition |
| Access | Pedestal doors onto service racks; lifting points on the head and on each pod; isolation points at the main disconnect, the compressor, the isolation valve, the vent and the gauge | the design definition's maintenance access |
| Lifting | A lifting plan is required: the barrels alone are 298 kg at 6 tubes and 796 kg at 16. On a roof, add fall protection, a service platform and a crane or davit plan. | calculated, from the mass ledger; the safety case carries it as a crush hazard |
The Pedestal Mount takes the tube module, the breech and the pneumatic chain the Launch Platform already defines, and gives them a fixed pedestal, a sensor head and an interlock chain built for a site that stays where it is.
The stack reads from the ground up: a foundation, a base plate or an embedded socket, a pedestal column whose cabinet holds the power, the controller, the network and the uninterruptible supply, a slewing bearing with the azimuth drive and brake, a head frame with the elevation trunnions, balancer and brake, one pod or twin pods of tubes, and the sensor head. The compressor and the air bank sit at grade in their own enclosure, because both shed heat and noise.
Nothing in the tube module changes. The bore is Ø90.00 mm, the stroke is 3,000 mm, the charge is 30 bar, and each barrel has its own normally closed breech valve that opens in under 5 ms. The rounds are Goose CS-110 and Encapsulator CS-111 at 1.600 kg, and a mixed load is allowed because both share one envelope, one mass and one indexing.
There is no warhead, no fuze, no primer, no propellant and no energetic material on the mount or in any round it fires. A cue is a permissive; no fire command crosses the cue interface, and no automated or remote-only fire path exists.
The largest consequence of inheriting the launch case is height. A three-metre stroke needs a barrel about 3,500 mm long, and a barrel that long, pivoted where it balances, puts the trunnion three metres up.
The pivot is not assumed. Taking moments about it, with the barrel and its share of the cradle acting at the tube's mid-length and the breech and manifold acting just aft of the breech face, puts the balance point 1.46 m forward of the breech face. The head balances there with no counterweight, and the balance point does not move with tube count, because every tube carries the same masses at the same stations.
That pivot drops the breech 1.41 m below the trunnion at +75°. With clearance under the breech and manifold the trunnion sits 1.66 m above the slewing ring, and 3.03 m above the base plane once the column and the bearing stack are counted. At +75° the muzzle reaches 5.00 m.
The alternative is worse. Moving the pivot to 0.8 m from the breech to lower the machine leaves 513 N·m per tube out of balance, which a counterweight of 392 kg at six tubes and 1,047 kg at sixteen would have to hold — more than half the head again, on a component that is fatigue-loaded and must hold through the shot. The balanced pivot is the recommendation, and the machine is tall because of it.
| Dimension | Value | Basis |
|---|---|---|
| Balance point, forward of the breech face | 1.46 m | Calculated by taking moments |
| Breech drop at +75° | 1.41 m | Calculated |
| Trunnion above the slewing ring | 1.66 m | Calculated, with clearance under the breech |
| Trunnion above the base plane | 3.03 m | Calculated, from the modelled column and bearing stack |
| Muzzle height at +75° | 5.00 m | Calculated |
The shot load is set by pressure, bore and mass at the instant the valve opens, before the round has moved. It arrives in 0.14 ms, which to a structure whose first mode is in the twenties of hertz is a step.
Thirty bar less one atmosphere acts across 63.617 cm², which is 18,441 N on the closed breech end, the valve body and the barrel-to-breech joint. The obturator's seal drag pulls the tube forward against it, so the net reaction into the mount is 18,191 N — the same number as the source's peak base force, reached by the other route. Over the whole stroke the mean is 9,546 N, and the in-bore impulse, counting the charge gas as well as the round, is 357.3 N·s.
For first sizing the design definition doubles the peak for a step-applied load, giving 36,382 N per barrel, and member checks then take a safety factor of 2.0 on top. A hand modal estimate puts the first bending mode between 22.8 and 34.6 Hz across the pod options; driving a single-degree-of-freedom oscillator with the published force history gives a dynamic load factor of 1.55 to 1.74 undamped and 1.50 to 1.69 at 2 % damping. The factor of 2.0 therefore carries 15 % to 29 % of margin over the first mode, and it stays until a modal analysis replaces it.
At the trunnion height the stroke forces, one barrel puts 110.3 kN·m of overturning into the base at 0° elevation on the equivalent static load. Overturning is worst at low elevation, where the reaction is almost wholly horizontal.
| Per barrel | Value | Basis |
|---|---|---|
| Gas load on the breech | 18,441 N | Calculated |
| Peak net reaction into the mount | 18,191 N | Calculated; it reproduces the source's peak base force |
| Mean base force over the stroke | 9,546 N | Calculated |
| In-bore impulse | 357.3 N·s | Calculated |
| Equivalent static load | 36,382 N | Calculated, at a step factor of 2.0 |
| Factored load for member checks | 72,764 N | Calculated, at a safety factor of 2.0 on top |
| Base overturning moment | 110.3 kN·m | Calculated, at the modelled trunnion height |
A pod of six to sixteen tubes is an order heavier than the reference four-tube cradle, and the shot torque it puts on the axes is orders above any laying torque. The two are different jobs, done by different parts.
A single centred pod's polar moment about the azimuth axis runs from 646 kg·m² at six tubes to 1,738 kg·m² at sixteen. Putting the pods out to twin heads at an illustrative half-metre offset raises the sixteen-tube case to 2,054 kg·m². Those are the numbers the drives work against, and the pointing performance the line offers is a decision that follows from them rather than one this sheet fixes.
The shot is a separate matter. A barrel whose bore line sits off the axis applies the peak reaction on that lever: 2,183 N·m at six tubes, 3,274 N·m at sixteen on a centred pod, and 12,370 N·m on twin eight-tube pods at half a metre. The brakes are sized at twice the worst torque of the configuration fitted, and the fire command waits on both of them engaged. The single centred pod is cheaper in brakes by about a factor of four, which is the strongest engineering argument in the pod decision.
If a brake were to let go for one shot, the angular impulse would turn a sixteen-tube head at 2.1°/s and a six-tube head at 3.8°/s. Over the time the round is in the bore that is well under a tenth of a degree, so the shot in flight is unaffected. What a slipping brake does is back-drive the reducer and the motor, and move the lay for the next shot. The brake is sized on torque, and it is tested for holding.
| Single centred pod | 6 tubes | 9 | 12 | 16 |
|---|---|---|---|---|
| Azimuth moment of inertia, kg·m² | 646 | 969 | 1,303 | 1,738 |
| Elevation moment of inertia, kg·m² | 642 | 969 | 1,292 | 1,738 |
| Worst shot yaw torque, N·m | 2,183 | 2,183 | 3,274 | 3,274 |
| Worst shot pitch torque, N·m | 1,091 | 2,183 | 2,183 | 3,274 |
| Design brake torque, kN·m | 4.4 | 4.4 | 6.5 | 6.5 |
| Rotating mass, kg | 648 | 958 | 1,267 | 1,679 |
At the fixed limits of both axes, independent of everything above them.
On both axes, wired into the sector permissive ahead of the arm relay. The cam set is site hardware, cut from the site's surveyed footprint map, sealed and recorded.
A laying solution outside the envelope is refused before the drives move.
Loaded into the laying software as a cross-check. It never replaces the cam switches.
The mount inherits the Launch Platform's four series permissives and adds four of its own, with a fifth at a site that requires canopy rounds, all hard-wired ahead of the arm relay. Any one of them open leaves the relay de-energized and the mount safe.
To a series chain a cut wire and a pressed stop are the same event, which is why the chain is hard-wired and dual-channel and never sits on a network. With every permissive in the chain made the arm relay energizes, and fire is a local operator action. The relay then drops when the fire command completes, so the key is turned again for the next shot and the mount returns to SAFE between shots. Each arm action releases one barrel, and one solenoid is energized at a time.
Where a site requires canopy rounds, a further interlock reads a mechanical round-type key at the breech and confirms the selected tube holds one, and the site's cam set carries the minimum lay elevation the canopy's release threshold implies. The sector cam set, the tilt switch and the anemometer are all hardware, independent of the laying software and of the encoders.
| Permissive | Kind | What it confirms |
|---|---|---|
| Emergency stop, dual channel | Inherited | Two normally closed channels agree that no stop is pressed |
| Area-clear key | Inherited | A named person has walked the near zone, as defined for the site, and turned the key |
| Muzzle cover | Inherited | The cover is off the muzzle |
| Relief proven | Inherited | The relief path is proven before the mount will arm |
| Sector permitted | Added | Cam switches on both axes confirm the tubes point into a permitted cell of the site's cam set |
| Enclosure closed | Added | Every cabinet door and pod cover is shut and sensed |
| Base level | Added | A tilt switch confirms the base is within tolerance |
| Wind within limit | Added | A wired anemometer and a threshold relay |
| Round type permitted | Added, at a site that requires canopy rounds | A breech switch reads the round-type key and confirms the selected tube holds a canopy round |
| Brakes set | Added, fire permissive | Both axis brakes are engaged before the breech may open |
Bearing, range and height cross the cue interface as a permissive. No fire command crosses it, no workstation elsewhere on the network can arm or fire, and any loss of power, bus, arm relay or interlock returns the mount to SAFE with the breech closed.
Detect, track, classify and cue are Canadian Shield's own. The head is passive but for an eye-safe rangefinder under emission control, and every link off it is fibre.
The head carries a day camera with zoom for identification, a long-wave infrared imager for night detection and track, a wide-field situational camera for the near zone and the key holder's view, and an eye-safe laser rangefinder for range. A passive acoustic array is optional, and earns its place as a bearing-only cue that tells the optics where to look. It carries no radar, no radio-frequency detector, no GNSS receiver and no antenna, and the design reserves nothing for one.
The design definition sets two requirements on the optics rather than naming any product. The first is that every channel's clear aperture is large enough that its detector, and not diffraction, sets its resolution — which at long-wave infrared is a demanding number, and it sizes the head, its mass and its window heaters. The second is that the rangefinder is Class 1 at the aperture to IEC 60825-1, classified by an accredited laboratory: an eye-safe wavelength is a necessary condition, not a sufficient one, and the class depends on pulse energy, divergence, pulse rate and aperture.
No detection range is given, and the design definition gives none. The figures it works are limits set by optics on a clear day against a target of known size and aspect. They leave out atmospheric transmission, contrast against sky or ground, thermal contrast on a battery-electric multirotor, target aspect and the search problem. A detection range for a named target class comes from trials.
Day, night, near zone and range, on one boresighted head, with a passive acoustic array optional.
The design carries none of them. Every data path on the mount is wired or fibre, and no copper leaves the head but its supply and its bond.
Detection is limited by fog, snow and rain, and without radio-frequency detection there is no warning of a drone before it can be seen. The design definition states the cost so the decision is made knowing it.
One three-phase load, one segregated control bus, one hard-wired safety chain, and fibre for every data run off the mount.
The compressor is the three-phase load. The reference design is drawn to 480 V, and the motor and supply are specified per site, because Canadian institutional sites commonly carry 600 V or 208 V and many sites abroad run at 50 Hz. Everything else runs on a 24 VDC bus kept physically apart from the three-phase side, sized to the fitted configuration inside a 3 % drop limit. An uninterruptible supply on that bus carries an orderly return to SAFE and keeps the sensor head running; loss of supply is safe regardless, because the breech is normally closed.
On the air side the compressor charges a certified, registered vessel through a filter, a dryer and a check valve. A relief valve set at 33 bar, 110 % of working pressure and sized for full compressor flow, stands above it and is proven by a switch in the arm chain. A transmitter reads the bank for the controller, a local gauge reads it for a person, and a manual isolation valve, vent and drain take the stored air out of the machine. The dryer is not optional at a site that sees −30 °C: compressed air carries water, and water freezes.
The network runs in three parts that never meet. The safety chain is hard-wired and dual-channel. The control link is a point-to-point CAN bus from the controller to the operator station, over fibre beyond the copper run. Video and track run on segregated Ethernet over fibre, one way and view only to site security. There are no external data ports on the mount, and the cue interface is physically capped when not in use.
| Element | What it is | Basis |
|---|---|---|
| Compressor | Electric, 17 kW shaft power, on three-phase | Calculated from the pneumatic work |
| Site supply | Specified per site; the reference design is drawn to 480 V | The electrical schematic and the design definition |
| Control bus | 24 VDC, segregated, inside a 3 % drop limit | A requirement of the design definition |
| Relief valve | 33 bar set point, full compressor flow, proven in the arm chain | 110 % of working pressure |
| Stored energy in the bank | 4.66 kJ per litre at 30 bar | Calculated, adiabatic expansion energy |
| Vessel | Certified and registered, with a Canadian Registration Number on the vessel and the relief device | The pressure-equipment note on the pneumatic schematic |
| Safety chain | Hard-wired, dual-channel, never on a network | A requirement of the design definition |
| Data off the mount | Fibre, segregated, view only to site security | A requirement of the design definition |
The occupied-site human-safety case is this line's first design driver, and it is open. What follows is what the engineering says about the ground a miss can reach, and the conditions the charter sets before any page may go further.
The safety case treats every round fired as a miss, because no hit or capture probability has been measured. On that basis, and at the round's design drag coefficient of 0.35 from ground level in still air at sea level, a missed round lands out to 1,659 m from the mount, and no elevation in the envelope lands one below 7.3 kJ. The round's terminal velocity is 137.9 m/s, so it never slows below about 95 m/s on any arc. A flat lay puts the round down further away; a steep lay puts it down nearer, not softer, returning from nearly a kilometre up.
The drag coefficient is the weakest figure in the chain. If the fairing the round's design definition names as a live option halved it, the reach would grow to 2,215 m, so a site survey carries the halved-drag radius until the drag is measured. Every footprint figure here is only as good as that coefficient, and it is given with it.
What the mount does about it is hardware. The sector cam set is cut from a surveyed footprint map for that one site and sealed; the mount will not arm with the sector permissive open; and no mount is armed at a site without both. Sectors change where a miss lands, not how hard it lands, and the safety case says so in terms.
| The miss, at Cd 0.35 | Value |
|---|---|
| Maximum range across the envelope | 1,659 m, at 39° |
| Minimum impact energy across the envelope | 7.3 kJ, at about 30° |
| Impact energy at 5° | 16.7 kJ, at 525 m |
| Impact energy at the +75° mount limit | 9.7 kJ, at 788 m, from an apogee of 962 m |
| Terminal velocity of the round | 137.9 m/s |
| Survey radius if the drag were halved | 2,215 m |
What the charter allows this sheet to say.
What it does not say, and why.
On the owner's ruling of 2026-09-11 the line opened a miss canopy as an option on the round rather than as a new round. It is engineering with a test list attached, and this sheet gives its constraints and not its results.
The option is a packed canopy in the round's forward body bay, aft of the nose and head interface, so one option serves the kinetic head and the Encapsulator head alike. It carries no energetic material, no electronics and no power source. It opens by a positive mechanical action and initiates nothing: what it opens is a fabric bay. The round stays at 1.600 kg with the same envelope, the same magazine pitch and the same launch case, and the option's mass comes out of the Goose nose or the Encapsulator ballast rather than being added.
Two things bind it. The first is that every automatic post-launch release needs a lock driven by the launch itself, and a lock plus a release condition is the architecture a fuze's safety-and-arming device uses. That the mechanism opens a fabric bay and starts nothing is the company's own distinction, and no regulator has yet ruled on it; counsel answers before any trigger is chosen. The second is stability: the option's mass is capped by the round's static margin rather than by the mass budget, and the design definition holds it to 150 to 250 g with the margin staying inside the 1.5 to 2.5 calibre band on both baselines.
A canopy round is a steep-lay round. No release has been chosen. The one the design definition recommends for study trips as airspeed decays, and were it set at a 60 m/s threshold it would open before landing only above 54.5° of quadrant elevation, with the round below that landing as any miss would. Where a site requires canopy rounds, the cam set enforces in hardware the minimum elevation the chosen release implies, and the round-type key at the breech enforces the round.
| What the engineering fixes | Value | Basis |
|---|---|---|
| Round mass, unchanged | 1.600 kg | A requirement of the design definition |
| Option mass band at R0.3 | 150 to 250 g | Built up by element and capped by the static margin |
| Static margin with the option fitted | 1.56 to 1.91 calibres across every case | Calculated; the design band is 1.5 to 2.5 calibres |
| Free volume in the forward body bay | 315 cm³ | Calculated from the bay's bore and clear length |
| Minimum lay elevation at a 60 m/s threshold | 54.5° | Calculated from the modelled arcs, for the airspeed-decay release recommended for study |
| Steady opening load at that threshold | 2.26 kN | Calculated, before any opening-shock factor |
| What a drogue stage would take off that load | A factor of 5.8 | Calculated, for a drogue slowing the round to 25 m/s first |
| Energetic material in the option | None; a reefing cutter is barred with it | A requirement of the design definition |
A Pedestal Mount is bought by the authority that owns the site, surveys the ground around it, accepts what the survey shows and holds the arm key.
What a buyer brings.
What the mount is not.
What changes between builds is the number of tubes, how they are grouped, how the mount stands on the ground, how it is loaded and where the shot volume sits. The bore, the charge pressure and the stroke do not change with any of them.
The design definition works every load, mass, inertia and brake figure across all four and rules none of them. Tube count moves the rotating mass from 648 kg to 1,679 kg, the azimuth moment from 646 to 1,738 kg·m² and the design brake torque from 4.4 to 6.5 kN·m. It does not move the balance point or the trunnion height.
Twin pods move each pod's mass out from the azimuth axis, which raises the polar moment and, far more sharply, the shot yaw torque: 12,370 N·m against 3,274 N·m at the same tube count. The brakes then cost about four times as much, which is the engineering argument for the single centred pod.
A bolted anchor on a concrete plinth uses cast-in headed rods, a base plate on levelling nuts and non-shrink grout, with the nuts under a locked shroud. An embedded steel socket cast into a reinforced pier puts the anchors out of reach from outside and gives a stiffer, lower base, at the cost of being permanent. Four screw-jack legs on pads suit a transportable build and must be ground-anchored or ballasted, because legs creep and a base that walks under a shot is not a base.
The reference auto-index magazine holds twenty-four rounds behind a lock, with a motor and an encoder and no pyrotechnics. Pre-loaded pods hold one ready round per tube behind a locked, sensed pod cover and reload at the breech or by pod exchange; there is then no indexer to design, and the ready rounds sit in the tubes.
A reservoir at each breech keeps the shot volume where the interior-ballistics model puts it, at the cost of a certified, registered, individually inspected vessel on a rotating head for every tube. One shared plenum on the head, fed through the azimuth by a hose loop, is far lighter and needs no rotary union for the ±170° travel, but it must refill between shots. The flow analysis that decides it needs a line and valve geometry that does not exist.
A packed canopy in the round's forward body bay, with a mechanical release, no energetic material, no electronics and no power source. It sits aft of the nose interface, so one option serves both heads. Where a site requires it, the round-type key and the cam set enforce both the round and its minimum lay elevation.
The lines the mount holds on every build and for every customer, and the one thing this sheet does not say.
The page this sheet specifies, and the sheets beside it in the line.
The page this sheet specifies, with the pictures and the reasoning.
A launch mount on a building roof, carried into the primary structure.
Every product and platform on one sheet each, on the web and as a PDF.
A first conversation needs the site, the three-phase power already on it, the ground within the survey radius and who owns it, the authority that will accept the residual risk, and who would hold the arm key.
Not an offer. Enquiries are screened, international transfer is subject to Canadian export permits taken per shipment, and all designs, systems and technologies shown are patent pending.
