Owl · CS-140 · Silent / Night ISR Platform

HEARD BY NO ONE.
HOME BEFORE THE LIGHT.

Name: Owl CS-140
Brand: Canadian Shield
SKU: CS-140

A big, slow propeller and an IR-biased eye — orbiting instead of hovering, unheard, unseen, unjammed.

Perimeter Watch · Route Overwatch · Night ISR · Site Surveillance

Contact Canadian Shield → Watch the Goose Film → Back to the Air Family

Patent pending Export-controlled — international transfer subject to Canadian government permits Passive-sensor carrier — no warhead, no effector, no RF payload

~2.1 H

Endurance on station

Ø0.55 M

Propeller — the quiet budget's variable

~86 M/S

Propeller tip speed (~M0.25)

Transmitters aboard, in any configuration

What It Is

A Quiet Fixed-Wing Watcher.
The Air Family's Night Eye.

Owl CS-140 is a quiet, fixed-wing electric aircraft built to orbit a route, perimeter or site through the night — unseen and unheard. It is a passive-sensor carrier, not an interceptor: no warhead, no energetic payload, nothing aboard that can strike, drop or designate.

It takes its place among four other airframes on the same launcher-and-doctrine logic. Kestrel is the cheap, attritable scout; Loon is the long-endurance, long-range eye; Raven is the family's deliberate radio exception — comms relay, decoy, electronic support. Owl is the one built purely for quiet: acoustic and thermal restraint carried ahead of reach or speed. It does not perch on the target; it circles above it. The platform's own hover cross-check makes the reason arithmetic rather than opinion — a same-mass quadrotor would burn roughly five to six times more power to hover than the Owl burns to cruise, so an orbiting fixed wing beats a loitering rotor on this mission.

The doctrine goes one step past the fleet's usual carriers-not-munitions rule. Owl does not just avoid explosives — it carries no effect of any kind. It does not ram, drop, designate for, or trigger anything. It carries sensors, and only sensors. Record-and-return is the baseline data path — perfectly silent, nothing radiated — with an optional trailing fibre for a live, human-in-loop feed on missions that need one. No RF payload of any kind: emission is deliberately left to Raven, so the family's one aircraft built for radio silence never becomes its own exception.

The Claim

Not perched. Orbiting.

Hover would cost five to six times cruise power on this airframe — arithmetic, not opinion. So the Owl never lands on the target; it circles above it, quietly, on a big slow propeller, until the battery says it's time to go home.

No transmitter — every frame records onboard; the only live option is a trailing fibre with a human in the loop.
No effector — it does not ram, drop, designate for, or trigger anything; sensors, and only sensors.
No prepared ground — a ~4 m bungee rail out, a deep-stall or belly-skid landing home.

01 How It Works · The Quiet Chain

LAUNCH QUIET. CLIMB QUIET. WATCH QUIET.

A bungee-elastic rail — about four metres, on unprepared ground — takes the Owl to stall-plus speed at a benign ~1.8 g: far gentler than the shock the fleet's tube-launched interceptors are built to survive. No pyrotechnics, no compressed-gas requirement, no shock-hardening program. That gentleness is also why COTS sensor and avionics hardware is credible on this platform at all.

Once airborne, one engineering control governs the quiet budget, and only one: propeller tip speed. A big propeller turning slowly moves the same air as a small one screaming — roughly 86 m/s at the tip, about Mach 0.25 — and classical propeller acoustics puts rotational noise near the fifth power of that number. No dB(A)-at-distance figure is published for this aircraft, for either the cruise condition or the launch transient: that number comes from a calibrated ground-acoustics measurement, not from arithmetic, and Canadian Shield does not publish arithmetic as measurement.

On station the nose or belly bay carries a passive EO/IR sensor biased toward infrared — the name mission is night watch off motor-and-battery contrast — and every frame is recorded onboard. There is no transmitter on this aircraft, in any configuration: the only live option is an optional trailing fibre for a human-in-loop feed. When the sortie ends, the Owl comes down on a deep-stall or belly-skid landing, on ground it never needed prepared, and the record comes home with the airframe.

NIGHT ORBIT CS-140 · big prop, low RPM — orbiting a watch point on the quiet budget

Full Specification Sheet

Every Number, Grouped for the Walk-Around.

The complete data card for the Owl — dimensions, performance, launch and recovery, propulsion, sensors, construction and compliance, grouped the way a fleet buyer compares them.

Owl CS-140 · Silent / Night ISR Platform Air Family · Sensor Carrier · Night Watch

01Dimensions & Mass

All-up mass: 4.5 kg
Wingspan (aspect ratio 10): ~2.0 m
Wing area / mean chord: ~0.40 m² / ~0.20 m
Airframe structure: ~1.5 kg (~33% of all-up mass)
Configuration: Fixed wing · segmented wing over a continuous carbon spar · electric drive

02Performance

Cruise speed: 16 m/s (~58 km/h)
Stall speed: ~12 m/s
Endurance: ~2.1 h (~1.8–2.4 h across the lift-to-drag sweep)
Endurance, cold-soaked at −20 °C: ~1.5–1.7 h
Cruise electrical power: ~98 W (~113 W bus draw incl. 15 W avionics and payload)
Hover cross-check, same mass: ~580 W · ~25 min — ~5–6× cruise power; why the Owl orbits
Continuous watch-point coverage: ~3 aircraft per point, ~20 min turnaround

03Launch & Recovery

Launch method: Bungee / elastic rail, ~4 m, unprepared ground
Launch acceleration: 18 m/s² (~1.8 g)
Recovery: Deep-stall / belly-skid landing on unprepared ground; replaceable rPET skid

04Propulsion & Power

Propeller diameter: Ø0.55 m
Propeller speed / tip speed (cruise): ~3,000 rpm / ~86 m/s (~M0.25)
Battery pack: Swappable COTS cells, ~1.58 kg (~35% of all-up mass)
Battery energy, usable: ~241 Wh (180 Wh/kg pack-level, 85% depth)
Propulsion (motor / ESC / prop): ~0.4 kg

05Sensors & Data

Sensor bay: One common bay, five swappable variants — LWIR night watch, low-light EO, dual EO/IR gimbal, acoustic listener, ballast/trainer
Sensor payload allocation: ~0.5 kg
Data path: Record onboard; optional trailing fibre — Tier 2, human-in-loop
Emissions in flight: None — no transmitter, no RF payload; passive receivers only

06Materials & Construction

Body / airframe: Moulded GF-nylon fuselage and wing shells — the wing split into three or four segments so each mould stays small
Primary structure: COTS pultruded carbon spar tube, full span
Recycled content: rPET non-structural only — belly skid, bay liners, ballast/trainer article
Tooling: Dies cut on Canadian Shield’s own 5-axis floor

07Compliance

Patent status: Patent pending
Export control: Export-controlled — international transfer subject to Canadian government permits; export posture is counsel-first
Munitions classification: Passive-sensor carrier — no warhead, no energetic payload, no kinetic-defeat role
RF payload scope: Raven CS-130 — emission is never Owl’s job

Endurance is stated at the 4.5 kg configuration with the lift-to-drag sweep beside it; bus power includes a 15 W avionics-and-payload allowance. No dB(A)-at-distance acoustic figure is published for either the cruise condition or the launch transient.

In the Doctrine

No Radio. No Warhead.
Just Eyes, Quietly, All Night.

The fleet's no-radio rule runs all the way through the Owl: passive optical sensing only, nothing radiated, and data that comes back with the airframe — by record-and-return, or over an optional trailing fibre with a human in the loop. There is nothing aboard for a jammer to find, because nothing aboard transmits.

Owl's product is the picture, not the effect. It hands what it sees to the systems that act — a route-watch frame that cues a ground patrol, a perimeter track that hands off to the interceptor family. Goose and Gyrfalcon get their shot cued by products like the Owl's; the Owl itself never rams, drops, designates for, or triggers anything. Looking and acting stay separated by design, on two different airframes, in two different roles.

The manufacturing thesis rides along. Moulded GF-nylon fuselage and wing shells — the division's first flying wing rather than a cylinder, split into three or four segments so each mould stays small — over a single non-moulded primary structure, a COTS pultruded carbon spar tube running the full span. Recycled rPET stays honestly confined to non-structural parts: the belly skid, bay liners, the ballast/trainer article. Cut on the same Canadian 5-axis floor as the rest of the fleet.

The Boundary

Look. Never act.

The Owl carries sensors and nothing else — no kinetic mass, no capture chemistry, no net, no dropped store, no laser designator, no RF payload. If the fleet ever needs an aircraft that transmits, that aircraft is called Raven, not Owl.

Deployment

A Night Watch, Walked Through.

One night watch, walked end to end — illustrative of how the aircraft is used, not a mission record.

01 · Launch

Off the Rail, No Prepared Ground

A bungee-elastic rail, roughly four metres, takes the Owl to flying speed at a benign ~1.8 g — no pyrotechnics, no compressed-gas step, no infrastructure beyond the rail and its shuttle. The sortie is preset before the rail; nothing checks in over a link, because there is no link to check.

02 · Watch

The Orbit Over the Point

The aircraft climbs out and settles into an orbit over the route, perimeter or site, its IR-biased eye recording onboard through the night. A single airframe is good for roughly two hours on station; continuous coverage is bought by rotation — about three aircraft per watch point, one up, one turning, one in reserve — not by asking one aircraft to do more than its battery allows.

03 · Recover

Down Quiet, Home With the Record

A deep-stall or belly-skid landing brings the Owl down on the same unprepared ground it left from; the replaceable rPET skid takes the wear. The battery pack swaps for the next sortie, and the sensor record comes off with the airframe — intelligence latency equal to sortie length, and nothing exposed to the air in between.

The Air Family · At a Glance

One Doctrine. Many Registers.

Owl is the Air family's night eye. Three siblings fly the same no-radio thesis in different registers — the cheap scout, the far-ranger, and the family's one deliberate radio exception. Same doctrine, different jobs.

This aircraft

CS-140 · Night ISR

Owl

The quiet night watcher — orbits a route, perimeter or site after dark on a big, slow propeller.

Download PDF ↓

CS-160 · Expendable scout

Kestrel

The cheap, attritable scout — tube-launched, priced to lose, sent anyway.

Download PDF ↓

CS-150 · Far-ranger

Loon

The long-endurance, long-range eye — hours on station, hundreds of kilometres out.

Download PDF ↓

CS-130 · Radio exception

Raven

The family's deliberate radio exception — comms relay, decoy and electronic support.

Download PDF ↓

Proof, Not Promotion

Silent Watch.
No Emissions. Back Before Dawn.

If you buy, build, integrate or regulate uncrewed night ISR for Canada or its allies, the Owl is on the table.

Contact Canadian Shield → The Goose Film → The Air Family The Fleet

Full Marketing Package

The Rest of the Fleet.

Every Canadian Shield platform has a brochure like this one — same depth, same status discipline, same refusal to publish a number we cannot source. Organized by family below.

Air · 8