Canadair CL-415

The flying boat that refills in twelve seconds, without ever stopping.

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The hull — this fuselage is a boat

The whole body of the aircraft is a boat hull: aluminium alloy, V-bottomed, 19.82 m (65 ft) long and 2.59 m (8 ft 6 in) across at its widest, with one abrupt ledge 25.4 cm (10 in) deep stepped into the bottom roughly beneath the wing. Inside, it is divided into many sealed compartments.

A water bomber has to put down on lakes and coastal water nobody has surveyed, sometimes a hundred times in a day, at weights up to 17 tonnes. Making the body of the aircraft the boat spreads that impact over a huge wetted area and provides buoyancy without bolt-on floats that would drag through every transit. Two details do the real work. The sealed compartments are the survival feature — if a submerged log punches the bottom, one bay floods instead of the whole aeroplane. And the ledge, called the step, is what lets it leave the water again: water clings to a smooth hull by suction, and suction is what makes an aeroplane-sized boat almost impossible to unstick. The step is a deliberate discontinuity. As speed builds, air is drawn into the void behind it, the aircraft rises onto the front section of hull alone, the wetted area collapses, the drag collapses, and it can accelerate to flying speed. Pilots call this being "on the step".

Hull beam 2.59 m (8 ft 6 in); step depth 25.4 cm (10 in). The aircraft scoops while balanced on that step at 130–150 km/h (70–80 kt), barely above its stalling speed.

The wing

One continuous wing sitting on the roof of the fuselage, 28.60 m (93 ft 10 in) from tip to tip and exactly the same 3.53 m (11 ft 7 in) from front to back all the way out. No taper, no sweep, no twist, and no upward angle at all.

Everything about this wing follows from a single decision: the fuselage is a boat. That is what puts the wing on the roof — the propellers have to clear the spray sheet, and a wing box carried through the middle of the fuselage would run straight through the planing bottom and the water tanks. Mounting it up there then answers the next question for free. Hanging a fuselage underneath a high wing already steadies it in roll, like a pendulum, so the upward angle almost every airliner carries would be redundant here — and worse than redundant, because it would make the aircraft sluggish in the tight, low circuit flown around a fire. That leaves the shape of the wing itself, and the shape follows from speed. This aircraft cruises at 333 km/h (180 kt) and does its actual work at less than half of that, so cruise efficiency was never the prize. A dead-flat rectangle, the same width at the tip as at the root, is cheap to build and — the part that matters at 45 m above a burning ridge — utterly predictable when it is flown slowly.

Span 28.60 m (93 ft 10 in), constant chord 3.53 m (11 ft 7 in), set at +2 degrees to the fuselage reference line — zero sweep, zero dihedral. Wing area 100.3 m² (1,080 sq ft).

Engines and nacelles

Two Pratt & Whitney Canada PW123AF turboprops — jet engines geared down to turn a propeller — each producing 1,775 kW (2,380 shp), carried in streamlined housings, called nacelles, above the wing. The "AF" stands for Amphibious Firefighter: this version of the engine was built for this job and no other.

The original 1960s aircraft used big piston radials that were maintenance-hungry and slow to answer the throttle. Turbines gave more power and far better reliability, but the decisive gain was response: idle to full power in roughly one second. On a scooping run the pilot is feeding in power constantly to stop the speed decaying while six tonnes of water piles on board, so an engine that hesitates is an engine that puts you in the trees at the far end of the lake. The nacelles carry a quieter improvement too — fixed wash-down plumbing built into them, so ground crews can flush salt out of the engine bays without manhandling hoses over an aircraft that is floating at the time.

1,775 kW (2,380 shp) per engine, and about one second from flight idle to full power.

Four-blade reversing propellers

Hamilton Standard propellers, four blades each, 3.97 m (13 ft) across. The blades rotate to any angle the crew asks for, including past flat — so that they push air forwards instead of backwards.

Reverse pitch is not just for stopping on a runway. On water, it is the steering. The CL-415 has no water rudder at all, and once it slows down there is no longer enough airflow over the air rudder for that to work either. From that point the crew steers by putting one propeller into reverse and leaving the other pulling forwards, pivoting the aircraft on the spot like a boat with two engines. The blades also sweep past the side of the fuselage with barely half a metre to spare, which is one of the reasons the wing had to sit so high above the water in the first place.

3.97 m (13 ft) diameter, with only 0.588 m (23.2 in) between the blade tips and the side of the hull.

The rudder

The moving surface picked out here is the rudder, the control that swings the nose left and right. It occupies the entire trailing edge of the fin — the fixed vertical surface it hangs on, which stands 5.18 m (17 ft) above the fuselage and is unusually short and broad rather than tall and slender. The fin blends into the rear hull through a long fillet, so the two read as a single piece of structure; only the rudder actually moves.

That deliberately stubby shape is sized for the worst moments in the job. If one engine quits, fin and rudder together have to hold the aircraft straight all the way down to 156 km/h (84 kt). If the water leaves the tanks unevenly, or one scoop probe bites harder than the other, they have to absorb a sudden slew at very low speed and very low altitude with a shoreline close ahead. A tall, slender fin would be more efficient in cruise — but it would need to be taller than a hangar door, and it would feed more bending load into a structure that already has to survive being slammed onto water again and again all day.

Fin height above the fuselage 5.18 m (17 ft), aspect ratio just 1.56 — broad and stubby. With one engine out, the aircraft can still be held straight down to 156 km/h (84 kt).

Tailplane and elevators

The horizontal wing at the back, 10.97 m (36 ft) across, and the hinged surfaces along its trailing edge that pitch the nose up and down. It crosses the fin partway up, making a cross — a "cruciform" tail. This is not a T-tail: a substantial amount of fin and rudder carries on above it.

Its height is a compromise between two different ways of coming to grief. Mount it low, where most aircraft have it, and it sits in the spray sheet and the wake, and goes under water in a heavy landing. Mount it right on top, as a T-tail, and you invite the deep stall — at a high nose-up angle the dead air spilling off a stalled wing blankets a top-mounted tailplane and the elevators lose their bite entirely. For an aircraft that spends its whole working life a few knots above the stall, that is unacceptable, so it sits partway up, in neither trap. It also has a violent job to do: when 6,137 L (1,621 US gal) of water leaves the aircraft in under a second, this is the surface that keeps the nose where the pilot put it.

Span 10.97 m (36 ft), constant chord 2.64 m (8 ft 8 in), set at +1 degree — and mounted partway up the fin, not on top of it.

The four tailplane finlets

Four small swept fins on the horizontal tail, roughly 2.0–2.2 m (6 ft 7 in – 7 ft 3 in) each side of the centreline — one standing above the surface and one hanging below it, on each side. They do not point straight ahead: each is angled 5 degrees off the line of flight.

These are the fingerprint of the turbine conversion, and they tell the best engineering story on the aircraft. Swapping piston radials for turboprops changed three things at once: more power, engines in a different place, and four narrow blades instead of three broad ones. The corkscrew of air coming off the propellers and washing back over the tail was simply not the same shape any more. And because both propellers turn the same way, that swirl arrives with a permanent sideways bias — one that shifts every time the pilot moves the throttles. The finlets sit right in it, and their 5-degree angle converts the swirl into a corrective push. Mounting them out on the tailplane rather than enlarging the fin also puts stabilising area a long way from the aircraft's balance point, where it has leverage; and as a bonus they act as end-plates, making the tailplane more effective in pitch too.

Four surfaces, not two — above and below the tailplane on each side — each toed 5 degrees off the fore-and-aft line.

Wingtip floats

Two boat-shaped pods on short pylons under the wings, 13.15 m (43 ft 2 in) out from the centreline — just inboard of the actual wingtips. They do not retract. Each will support 862 kg (1,900 lb) before it goes under.

A flying boat sitting on water is balanced on a knife edge; without these it would simply lie over onto one wingtip. The clever part is that when the aircraft floats upright the floats hover just clear of the surface, so they cost almost no drag and make no waves — they take load only when it actually rolls. They are deliberately fixed rather than retractable, because a retraction mechanism would mean weight, complexity and a salt-corrosion trap, and because a float is needed at precisely the moment such a mechanism would be most likely to have failed. Best of all, the pylons are designed to shear off cleanly if a float catches a wave or a submerged obstacle at 150 km/h. Losing a float is survivable. Tearing open the wing spar is not.

Each float displaces 862 kg (1,900 lb) of water, and its pylon is built to break away rather than let the wing be damaged.

Main landing gear

One large wheel on each side, folding up into a shallow well in the side of the hull, with a plate on the leg that closes off the bottom of the well. Wheel track is 5.25 m (17 ft 3 in).

Start with the constraint. The hull bottom beneath these wheels is a planing surface: it carries the whole aircraft every time it touches water, so it cannot be hollowed out to swallow a wheel. That is why the wells are so shallow, and why the tyres stay partly visible from underneath even with the gear tucked up — not an oversight, but the only arrangement a boat hull permits. What that awkward compromise buys is worth it. It makes the CL-415 an amphibian rather than a flying boat, and it deletes an entire category of equipment: pure flying boats like the wartime Catalina needed bolt-on "beaching gear" — wheeled cradles that people had to fit while wading into the water — just to get ashore. The CL-415 drives itself up the ramp, across the apron and into the hangar. For a machine that flies from sunrise to sunset and is serviced overnight, that is the difference between owning a fleet and being able to turn one around.

Track 5.25 m (17 ft 3 in), wheelbase 7.22 m (23 ft 8 in) — and the tyres remain partly exposed when retracted.

Nose gear, and its leaky doors

A steerable, self-centring twin-wheel unit on the hull centreline that retracts backwards into a bay, closed by doors shaped to follow the V of the hull bottom exactly.

There is only one place a nose wheel can go on a boat hull — straight back down the centreline — because the fine bow has no room for a bay. The doors have to trace the hull's V precisely, since on touchdown at 130 km/h a badly fitting bay would take a solid jet of water. The surprising part is that they do not seal at all. Rather than fight the water, the design accepts it into the bay and drains it out through two drains once the aircraft is airborne: a very boat-like answer to an aeroplane problem. It is also why pilots deliberately touch down nose-high — partly to keep these doors out of the worst of it, and partly to stop the sharp edges of the hull bottom digging in and pivoting the aircraft into a "water loop", the marine equivalent of a ground loop.

The doors deliberately do not seal: water floods the bay on landing and drains out through two drains once the aircraft is airborne.

The water scoops

Two small metal probes that pivot down and forward from the hull bottom just behind the step, one feeding each tank. The mouth of each is only 7.6 x 12.7 cm (3 x 5 in) — about the size of a paperback cover.

There is no pump anywhere in this system. The mouths face into the flow, and at 130–150 km/h the sheer pressure of water piling up against them drives it up the ducts and into the tanks against gravity — the same effect as holding your hand flat out of a car window. Refilling this way takes about twelve seconds on a lake the crew is already flying over, instead of a forty-minute round trip to an airbase, and that single fact is why the aircraft exists in the shape it does. The openings are tiny on purpose: a larger mouth would create so much drag that the aircraft could not hold flying speed on the water. Even at this size the drag is brutal — the crew holds around 80% engine torque simply to stop the speed decaying. The probes are also sacrificial, designed to break away rather than tear the hull open if they strike debris, and their size is the reason the persistent legend about scooping up a scuba diver is a physical impossibility.

Each intake measures 7.6 x 12.7 cm (3 x 5 in), yet together the two take on roughly 500 kg of water every second.

Chines and spray strips

The sharp lengthwise edge where the V of the hull bottom meets the near-vertical hull side, running the full length of the aircraft — on a Sécurité Civile machine, the line where the red paint meets the yellow. Channels are formed into it, sometimes called spray suppressors.

This is the defining water-bomber problem. A 17-tonne hull at 150 km/h throws up a colossal sheet of water, and everything it can reach is a target: it erodes propeller blades, it can put the engines out if it reaches the intakes, and it can damage the tail and disturb the controls at the worst imaginable moment. A sharp chine edge makes the water separate cleanly instead of climbing the hull side, and the channels turn what does rise downward and outward. That is why photographs of a scooping run show a low, wide rooster tail well behind the aircraft rather than a cloud swallowing it. The chine is a hazard in its own right, though: dug in too deep at 130 km/h it can pivot the whole aircraft into a "water loop".

The anti-spray channels are formed directly into the chine, to throw water clear of the propellers, the engine intakes and the tail.

Flaps

Large hydraulically driven panels along the trailing edge of the wing that swing down to give more lift at low speed. Each hangs on four brackets that project visibly below the wing, and there are only four settings: 0, 10, 15 and 25 degrees.

The flaps are what let the aircraft fly slowly enough to scoop and to drop accurately. But the interesting number is 15. Crews select 15 degrees and leave it there for all low-level work — scooping, dropping and the circuit in between — so that nobody has to reconfigure the aircraft while manoeuvring 45 m above a burning ridge. You can read the designers' intent straight off the limits table: at 15 degrees the aircraft is cleared to +3.25 g, while 10 and 25 degrees allow only +2.0 g. The hinges hang out in the airflow instead of being buried in tracks inside the wing because external hinges can be inspected, hosed down and replaced — buried tracks, on an aircraft that lives in salt spray, would be corrosion traps.

At 15 degrees of flap the aircraft is cleared from -1.0 g to +3.25 g; at 10 and 25 degrees, only 0 to +2.0 g.

Ailerons

The hinged panels out near each wingtip that roll the aircraft left and right. They are hydraulically powered, each with a geared tab, plus a trim tab on the left-hand one only — and if the hydraulics fail, the pilot can revert to moving them by hand.

On the original piston aircraft every flying control was purely muscular, and the workload was punishing: a machine this heavy, in fire-generated turbulence, gaining six tonnes of water in twelve seconds and shedding it in one, simply wore crews out. Power assistance arrived with the turbine conversion of 1989 and carried over to the CL-415 — but the manual fallback was kept, so that a hydraulic failure is a bad day rather than a fatal one. The trim tab on the left aileron alone is the giveaway for something subtler: both propellers turn the same way, so the aircraft carries a permanent slight roll and yaw bias that the pilot would otherwise be holding off by hand all day long.

Powered flying controls came in with the turbine conversion and carried over to the CL-415; on the piston CL-215, every flying control was moved by hand.

The wing fence

A small blade standing up from the upper surface of the wing and running front to back across it. A fence in the literal sense: a low wall placed in the path of the air.

Air on top of a wing does not travel only backwards. It also drifts sideways, outwards along the span, and it arrives at the wingtip tired and low on energy. That is what makes some wings stall at the tip first — the worst possible place, because the tip is where the ailerons are, so losing it means losing roll control at exactly the moment you need roll control. The fence blocks the sideways drift and keeps the outer wing flying. On an aircraft that spends its working life at 130–150 km/h just above the stall, over water, or 45 m above a burning hillside, keeping the ailerons alive right down to the stall is not a refinement — it is the difference between a wobble and putting a wingtip into the trees.

The fence is one of a whole family of small parts fitted to control where this wing stalls first: there are also leading-edge strakes and further fences beside the engine nacelles, and a row of vortex generators outboard of the fence.

Doors, hatches and windows

Doors and hatches set into the side of a flying-boat hull — a hull built as a series of sealed, watertight compartments — with the cabin windows running along beside them.

On an ordinary aeroplane a door is a hole in the side that has to keep the weather out. Here it is also a hole in a boat. The hull is compartmented so that a punctured bottom floods one bay rather than the whole aircraft, and every opening cut into it has to be closed well enough not to spoil that. The certification basis makes the water case explicit: this type is approved against the ditching rules, which call for an exit above the waterline on each side. That is not a paper exercise. When a CL-415 was wrecked on a lake in Newfoundland in 2013 and came to rest upright with the cockpit partly under water, the first officer climbed out through the overhead escape hatch in the cockpit roof and the captain went out through the sliding window on the left-hand side; both waited on the wing until a boat reached them half an hour later. That roof hatch is worth knowing for a happier reason too: it opens onto a walkway running between the two pilots' seats, and it is how the crew moor the aircraft from the inside — and, on the piston-engined ancestor, how ground crews used to climb up to wash salt off the engine nacelles by hand, a chore the CL-415 designed out by plumbing the wash-down system into the nacelles themselves.

Not every opening in this hull is meant to be watertight. The nose-gear bay doors deliberately do not seal: that bay floods on purpose and drains out once the aircraft is airborne.

History

1944
Canadair is founded in Montreal
Canadair Limited comes into being on 11 November 1944, out of the Canadian Vickers aircraft plant at Cartierville Airport in Saint-Laurent, Montreal, after Vickers asks the Canadian government to relieve it of running the factory. Sources describe the legal mechanism differently — incorporation in one account, a management contract in another — but they agree on the date.
1963
Canada decides it needs a purpose-built water bomber
Until this point every water bomber in the world was a conversion: a wartime bomber or a bush plane with a tank bolted in, carrying the wrong load, handling badly, and with half its fatigue life already spent. Canadair had been studying a utility amphibian as a freighter and redirected the concept after forestry officials in Quebec asked for an aircraft built to carry water. In 1963 the National Research Council's Associate Committee on Forest Fire Protection agreed on the need. The specification that followed called for a multi-engine amphibian able to deliver up to 6,820 L (1,500 imp gal), filled either on the ground or by scooping from a lake or the sea.
1967
First flight of the CL-215
The prototype flies on 23 October 1967 — the first aircraft anywhere designed from a blank sheet of paper with water bombing as its primary role. Power comes from two Pratt & Whitney R-2800 twin-row piston radials of roughly 2,100–2,200 hp each.
1969
First delivery — to France
The first CL-215 is delivered in June 1969 to the French Protection Civile, today's Sécurité Civile, based at Marignane near Marseille. France goes on to operate 15 of them until 1996. Its previous water bombers had been converted Catalina flying boats, flown from 1963 to 1970; two of those were destroyed. It is the second loss — a training crash in November 1967 in which the pilot was killed and the body was not found until the next day — that made the crews trade their green military coveralls for the far more visible orange flight suits French water-bomber crews still wear.
1986
Canadair is privatised and sold to Bombardier
After the Canadian government nationalised Canadair in 1976 and then absorbed record losses on the Challenger business jet, the company is sold to Bombardier for C$120 million plus royalties. The enabling statute receives Royal Assent on 19 December 1986. The date often quoted, August 1986, is when the deal was announced; the exact closing date could not be confirmed.
1989
First flight of the turbine CL-215T
On 8 June 1989 a converted CL-215 flies with Pratt & Whitney Canada PW123AF turboprops in place of the piston radials, along with wingtip endplates, tailplane finlets, powered flying controls, higher weights and a foam injection system. Canadair decides not to build new CL-215Ts, selling conversion kits instead and putting its effort into an all-new aircraft. Spain takes the bulk of those kits and re-engines much of its own fleet from 1990, though published counts of how many differ.
1990
CL-215 production ends after 125 aircraft
Production ran from 1969 to 1990. Many of those airframes are still flying today, a number of them since converted to turbine power.
1993
First flight of the CL-415
The CL-415 flies on 6 December 1993. Against the turbine-converted CL-215T it adds a four-door drop system in place of two doors, an EFIS "glass" cockpit, a slightly larger tank, and higher weights and speeds. Moving the more powerful engines inboard, closer to the fuselage, upset the tail's behaviour, which is why the aircraft carries a small fixed slat, mounted upside down, ahead of its right-hand tailplane only.
1994
Certified — and delivered to France again
Transport Canada approves the type, formally the CL-215-6B11, on 24 June 1994, with European certification following on 27 October. First deliveries are in November 1994, once more to France's Sécurité Civile. French sources date their fleet's entry into service to 1995, which is compatible: delivery and entry into service are not the same event.
1994
Quebec starts lending Super Scoopers to Los Angeles
Under an agreement first struck in 1994, Quebec's government air service leases two CL-415s, with pilots and maintenance crews, to the Los Angeles County Fire Department each year from 1 September for three to six months — Quebec's fire season and Southern California's being conveniently out of phase. The programme is still running, and made headlines again during the January 2025 Los Angeles firestorm.
2015
Bombardier stops the line after 95 aircraft
In October 2015, with no orders to fill for the following year and a cash crisis caused by its CSeries airliner programme, Bombardier ends the line. The aircraft were assembled in Montreal and finished at North Bay, Ontario, and it is the North Bay completion centre that closes. The final total is 95 aircraft: 86 standard CL-415s, 6 CL-415GRs for Greece and 3 CL-415MP maritime patrol versions.
2016
Viking Air buys the programme
Viking Air announces on 20 June 2016 that it is buying the CL-215 and CL-415 type certificates from Bombardier, closing the deal on 3 October. It then launches the CL-415EAF, converting old piston CL-215 airframes to turbine power. Bridger Aerospace of Bozeman, Montana becomes launch customer in May 2018 with a US$204 million contract; the first converted aircraft flies on 9 March 2020.
2022
A new aircraft: the DHC-515 Firefighter
On 31 March 2022 De Havilland Canada launches the DHC-515 — essentially the same airframe brought back into production — with letters of intent for the first 22 aircraft from European customers. Final assembly is at Calgary, Alberta. In August 2024 the European Commission announces a fully EU-financed fleet of 12 amphibious firefighting aircraft under its civil protection mechanism.
2025–2026
Canadian provinces and European nations queue up
Manitoba commits C$80 million for three aircraft in April 2025, Ontario over C$500 million for six in November 2025, and Alberta C$400 million for five in February 2026. The Canadair name itself is already back: De Havilland revived it in October 2024, rebranding the aircraft the "De Havilland Canadair 515" on the grounds that a Canadair is what Europeans still ask for when a fire starts. In March 2026 the company reports the first wing box and forward fuselage complete. France doubles its own commitment in June 2026, ordering two more.
2028
First DHC-515 delivery planned — to Greece
At Farnborough in July 2026 De Havilland reports about 38 aircraft on order — six European nations, three Canadian provinces and Indonesia — with final assembly starting in 2026 and certification and first delivery targeted for 2028. Order totals have been reported inconsistently, from about 30 to 38. No first flight has taken place yet; the company says it is aiming for late 2027 or early 2028.

Full name	Canadair CL-415, certified as CL-215-6B11; widely nicknamed the Superscooper
Role	Amphibious water bomber — it lands on water, refills without stopping, and drops on fires
Crew	2 (pilot and copilot; no flight engineer)
Wingspan	28.60 m (93 ft 10 in)
Length	19.82 m (65 ft 0 in)
Height on its wheels	8.90 m (29 ft 3 in); the manufacturer's own sheet quotes 9.02 m (29 ft 7 in)
Wing area	100.3 m² (1,080 sq ft)
Engines	2 × Pratt & Whitney Canada PW123AF turboprops, 1,775 kW (2,380 shp) each
Propellers	Hamilton Standard 14SF-17 or 14SF-19, 4 blades, 3.97 m (13 ft 0 in) diameter, reversible
Water capacity	6,137 L (1,621 US gal / 1,350 imp gal), about 6.1 tonnes
Foam concentrate	About 680 L (180 US gal), enough for roughly 20 drops
Usable fuel	5,796 L (1,530 US gal) pressure-refuelled, up to 4,626 kg (10,200 lb)
Empty weight	About 12,300–13,000 kg (27,100–28,650 lb) depending on fit
Max takeoff weight, land	19,890 kg (43,850 lb)
Max takeoff weight, water	17,168 kg (37,850 lb) before scooping
Max lift-off weight after scooping	21,364 kg (47,000 lb)
Normal cruise	333 km/h (180 kt / 207 mph)
Maximum operating speed	346 km/h (187 kt / 215 mph)
Stall speed, landing configuration	126 km/h (68 kt / 78 mph)
Scooping speed	130–150 km/h (70–80 kt / 81–92 mph)
Drop speed and height	195–204 km/h (105–110 kt) at 30–46 m (100–150 ft) above the trees
Time to fill the tanks	About 12 seconds, over roughly 410 m (1,345 ft) of water
Minimum water depth	1.83 m (6 ft) minimum, 3 m (10 ft) preferred
Service ceiling	4,481 m (14,700 ft); scooping permitted up to 2,440 m (8,000 ft) pressure altitude
Ferry range	2,333 km (1,260 nautical miles / 1,450 miles)
Delivery rate	7–12 drops per hour with water 6–15 km (4–9 miles) away; up to 125,000 L (33,000 US gal) per hour
Built	95 CL-415s, 1994–2015; 125 piston CL-215s before that

3D model derived from the FlightGear "Bombardier-415" aircraft, used under the GNU General Public License v2.0; the original AC3D source is kept in this repository. The text draws on the EASA type certificate data sheet for the CL-215 family, FAA and Transport Canada documentation, Flight International's flight tests of the type, and Transportation Safety Board of Canada report A13A0075. Where the sources disagree, the text says so rather than picking a winner.