Goose CS-110 and Encapsulator CS-111 fly one ballistic arc from one shared tube. CS-120 is the line's second and heavier interceptor class: fifteen kilograms, its own Ø96 mm launcher, a tail motor and a bow-thruster ring that hold it in flight, and a person correcting it down an optical fibre.
The lead round spends nothing after the muzzle because it carries nothing. This one carries a motor, a battery and a computer, and the mass it took to make that work sets everything else about it.
Goose CS-110 and Encapsulator CS-111 are one round in one tube: unpowered, ballistic, live only for the fraction of a second the launcher gives them. CS-120 is the line's second and heavier class, and it is built to stay live after the muzzle. It carries a tail sustain motor, a four-fan bow-thruster ring, a battery and a flight computer, and it trails an optical fibre so a person can correct it in flight. It shares the family's doctrine, its pneumatic architecture and its safety spine. It does not share a bore, a launcher or a magazine with the lead round, and the two do not interchange.
Three decisions settle the round: what it weighs, what bore it fires from, and how fast it leaves the tube. All three follow from one another, and the reasoning is arithmetic before it is anything else. The rest of this page is what that arithmetic bought.
Mass, bore and launch velocity are one decision on a powered round, not three. The sustain-power arithmetic was worked across the whole mass range before fifteen kilograms was chosen.
A powered round has to carry its own battery, and the lighter the round, the harder that battery has to work to hold it in the air. At 1.6 kg — Goose's mass — sustaining flight takes roughly 22 kW, and the round simply cannot carry a battery that size. At 8 kg the draw eases to about 2.0 kW, still demanding on a round that has grown heavier without gaining much it can carry. At 15 kg the sustain load falls to roughly 0.78 kW, and a battery, a motor and a flight computer carry that between them without difficulty. Twenty kilograms is easier again, but it is more round than the job needs.
The curve does not fall in a straight line: it drops fastest at the light end and flattens out above twelve kilograms, so a further gain in mass buys progressively less ease past the point CS-120 sits at. Fifteen kilograms is the mass CS-120 is built at, and what changed was the mass: powered flight did not fail on Goose because the idea was wrong; it failed because the mass was wrong.
| All-up mass | Sustain power at cruise |
|---|---|
| 1.6 kg | ~22 kW |
| 4 kg | ~5.7 kW |
| 8 kg | ~2.0 kW |
| 12 kg | ~1.1 kW |
| 15 kg | ~0.78 kW |
| 20 kg | ~0.51 kW |
The power valley across the mass range the design definition worked. CS-120 is built at 15 kg.
CS-120 does not fire from Goose's tube. Its bore, its pressure and its stroke are its own, sized for its own mass and its own velocity.
Putting CS-120's 72 kJ of launch energy into a 15 kg round at Goose's own pressure and stroke — 30 bar over 3.0 m — would need a bore near Ø143 mm, which is unwieldy. Raising the charge pressure to 50 bar and the stroke to 4.0 m instead brings the bore down to Ø96 mm, and that is the tube CS-120 is built around. The figure lands close to Goose's own Ø90 mm bore, but only by coincidence of the pressure and stroke chosen for a heavier round: the two are not one tube built to two masses. They are two bore-and-pressure classes, each sized for the round that fires from it, and the rounds are not interchangeable.
CS-120 shares the line's doctrine, its pneumatic architecture and its safety spine — covered on The Launch Platform for the shared bore that Goose CS-110 and Encapsulator CS-111 fire from. What CS-120 does not share is that barrel, that magazine or that launcher. Its own launcher is a separate design on the same pneumatic architecture, built to its own bore.
Every gram of CS-120's mass is spent somewhere specific: on the effector, the airframe, the motor, the batteries and the fibre it flies on.
The mass budget sums to exactly 15.00 kg across nine line items, from the nose effector and structure through to the obturator and sabot that seal the bore at launch. Each figure carries its own line in the mass budget.
| Item | Mass |
|---|---|
| Nose effector and structure | 6.00 kg |
| Body and airframe, moulded and CF | 3.50 kg |
| Tail sustain motor and prop | 1.20 kg |
| Four-fan bow-thruster ring | 1.00 kg |
| Battery | 0.40 kg |
| Flight computer, servos and wiring | 0.60 kg |
| Fibre payout spool | 0.50 kg |
| Fins and boom | 1.20 kg |
| Obturator and sabot | 0.60 kg |
Nine line items, summing to 15.00 kg.
Nose effector and structure alone account for 6.00 kg of the total. Fins, boom, obturator and sabot are the same engineering problems Goose's own round solves, carried here at a different mass for a different bore. What the effector share means next to Goose's own mass budget is its own section, below.
CS-120 is the first round on this line to carry power and electronics into the air. What it carries is propulsion and guidance. What it carries is never a weapon.
A tail sustain motor and propeller keep CS-120 in the air after the launch phase, instead of committing it to the single arc Goose's fixed fins fly.
A four-fan bow-thruster ring gives the round authority to correct its own line in flight, driven by the same on-round electronics the fibre link commands.
A battery pack and a flight computer run the motor, the thruster ring and the servos aboard, and are the reason this round needs the family's first on-round wiring harness.
A fibre payout spool pays out the optical tether a person commands the round down — the physical link this line's Tier 2 guidance runs on.
No warhead, no fuze, no energetic material. CS-120 carries a motor, a battery and a nose effector — nothing that operates a weapon.
Every item on this list gets CS-120 into the air and keeps a person deciding what it does once it is there.
Goose's round is unpowered and takes 1,159 g at the peak without complaint. CS-120 carries a battery and a flight computer, and its launch is built to a different number.
Every fixed quantity in Goose's launch is chosen for a round with nothing to protect: no battery, no motor, no circuit board, so a peak of 1,159 g is simply a structural number, sized into six bonded fins and a steel nose. CS-120 carries a battery, a flight computer and servos into the same kind of launch pulse, and its own bore, pressure and stroke put the peak at roughly 240 g — a fifth of Goose's figure. It is the same mass-budget argument as the section above, read in reverse: Goose spent its whole design on taking a hard launch and carrying nothing else; CS-120 spent some of its launch energy back, buying a launch its own electronics can survive.
Every launcher on this line has always needed a harness. CS-120 is the first round that needs one of its own.
Every wiring document on this line up to now has belonged to a launcher. Goose CS-110 and Encapsulator CS-111 carry no battery, no motor and no receiver, so neither round has an electrical system to wire. CS-120 changes that: with a tail sustain motor, a bow-thruster ring, a battery, a flight computer and servos aboard, it is the first round in the line that needs a wiring harness of its own.
The harness is a Wired Industries assembly, built to the same discipline the launcher harnesses already use on this line: power kept clear of signal, every connector mated and checked before the round is trusted with a launch. It is new work for the round, not new work for the company — Wired Industries already builds the launcher's own harnesses, and CS-120 is the first round in the line built to carry one.
CS-120 flies primary on Tier 2: a physical fibre a person commands it down. No part of it is a radio channel.
Three guidance tiers run across this line and none of them puts anything into the radio spectrum. CS-120 flies the middle tier, Tier 2, fibre-guided, and it flies it as the primary mode, not a backup: the round trails an optical fibre from its own payout spool, and a person at the far end commands it down the wire for the whole flight. A fibre radiates nothing, so there is nothing for a jammer or a direction-finder to work on. A radio channel gives both of them something, and this line does not use one.
Tier 1 preset is not a separate mode CS-120 also happens to fly. It is the tier CS-120 degrades to. The round leaves the muzzle carrying the same kind of computed firing solution every round on this line carries, so losing the fibre is a defined degrade to a guidance mode the round already has, never an uncontrolled loss of guidance.
The full ladder is set out in one place on Guidance on This Line.
Goose puts most of its mass into the steel that does the work at the target. CS-120 spends the same budget differently.
Nose effector and structure together are 6.00 kg of CS-120's 15.00 kg all-up mass — a 40% effector fraction, against Goose's 77.1%. The other 60% is not spent doing less: it is the tail sustain motor and prop, the four-fan bow-thruster ring, the battery, the flight computer and servos, and the fibre payout spool that between them let CS-120 stay live and correctable after the muzzle, instead of committing to the one ballistic arc Goose flies. Every kilogram that is not effector on this round is a kilogram spent buying flight.
Most of this line's answers are Goose. CS-120 is the answer when the job specifically needs a powered, correctable round.
The conversation starts with a screened enquiry, the same as anywhere else on this line. Nothing on this page is an offer.
Bring the engagement problem you are solving, the launch environment it has to work in, and the point at which Goose's ballistic round stops answering it. Every enquiry is screened before any discussion; supply is subject to Canadian export permits issued per shipment, and export posture is counsel-first. The reply comes in writing, from a person.
The line as a whole, with Goose CS-110 and Encapsulator CS-111 beside CS-120, is on CDNS UAV Platforms. The shared bore and its pneumatic chain are on The Launch Platform. The full guidance ladder is on Guidance on This Line. The interlock chain, the exclusion zones and the human arm action every shot needs are on Safety on the Launch Line.
All CDNS UAV Platforms designs are patent pending; international transfer is export-controlled and subject to Canadian government permits taken per shipment, and nothing on this page is an offer.
