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Aeromarine 40

Flying Boat Trainer Biplane Aircraft

United States | 1918

"The Aeromarine 40 floatplane series saw only 50 built from the original 200-strong production contract thanks to the end of World War 1."

Authored By: Staff Writer | Last Edited: 02/25/2020 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The Aeromarine Model 40 (or simply "Aeromarine 40") was a two-seat flying boat trainer aircraft serving the United States Navy. The aircraft was produced by the Aeromarine Plane and Motor Company of Keyport, New Jersey, and had already made a name for itself by supplying the US Navy with its first carrier-landed aircraft in the Aeromarine Model 39, detailed elsewhere on this site. Whereas the Model 39 could be utilized as a land-based and flying boat aircraft equally (requiring the conversion of the undercarriage to suit each task), the Model 40 was a dedicated flying boat.

Design was conventional for the time, consisting of a contoured boat-like hull fitted to a boxy fuselage mounting a large unequal-span biplane wing configuration. Single pontoons were fitted as outrigger floats, one per each lower wing assembly. The upper and lower wing assemblies were joined by parallel struts making up two bays and fitting appropriate cabling. The student and instructor sat side-by-side just behind the nose and in front of the wing structure in an open-air cockpit. The view was superb from this position with their forward views protected by two simple curved windscreens. The empennage was adorned with a conventional large-area vertical fin and horizontal tailplane system showcasing rounded edges. The powerplant was placed within a strut configuration supporting the upper and lower wing assemblies at mid-span. The engine was situated well above and just behind the pilots, sporting a two-bladed pusher propeller system powered by a single Curtiss OXX-6 series V-8 water-cooled engine producing an output of roughly 100 horsepower (some later Model 40's were known to fit a Hispano-brand engine in its place). Performance from this pusher arrangement allowed for speeds of up to 71 miles-per-hour with a service ceiling of nearly 1,900 feet. Endurance was listed at about 4.5 hours of flight time.

200 Model 40's were initially ordered by the US Navy in 1918. The end of the war in November ultimately signified the end of the production contract, leaving only 50 Model 40 examples produced. Model 40's still managed to see service in the post-war world solely with the United States Navy, encompassing the early and fascinating inter-war years in America. Overall, their operational use proved the airframe too fragile for the constant rigors of water-born operations, to which these results helped in future American flying boat designs. The Aeromarine Model 40 was further developed into the Model 41 to which some existing Model 40's were converted to this newer design.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Aeromarine 40F Flying Boat Trainer Biplane Aircraft.
1 x Curtiss OXX V-8 water-cooled engine developing 100 horsepower driving a two-bladed wooden propeller in pusher configuration.
71 mph
114 kph | 62 kts
Max Speed
1,903 ft
580 m | 0 miles
Service Ceiling
314 miles
506 km | 273 nm
Operational Range
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
The nose-to-tail, wingtip-to-wingtip physical qualities of the Aeromarine 40F Flying Boat Trainer Biplane Aircraft.
28.9 ft
8.80 m
O/A Length
48.6 ft
(14.80 m)
O/A Width
11.5 ft
(3.50 m)
O/A Height
2,061 lb
(935 kg)
Empty Weight
2,590 lb
(1,175 kg)
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
Notable series variants as part of the Aeromarine 40 family line.
Aeromarine Model 40F
Aeromarine Model 41 - Further development of the Model 40.
Global customers who have evaluated and/or operated the Aeromarine 40. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 50 Units

Contractor(s): Aeromarine Plane and Motor Company - USA
National flag of the United States

[ United States ]
Relative Max Speed
Hi: 100mph
Lo: 50mph
Aircraft Max Listed Speed (71mph).

Graph Average of 75 MPH.
Era Crossover
Pie graph section
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
Aviation Timeline
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Image of the Aeromarine 40
Close-up detail view of the bow of the Aeromarine 40 flying boat
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Image of the Aeromarine 40
Rear left side view of the Aeromarine 40 flying boat at rest on water
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Image of the Aeromarine 40
CLose-up detail view of left side of the Aeromarine 40 flying boat at rest; note struts, engine and cable work
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Image of the Aeromarine 40
An Aeromarine 40 flying boat on water preparing for flight
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Image of the Aeromarine 40
An Aeromarine 40 flying boat in flight
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Image of the Aeromarine 40
An Aeromarine 40 flying boat in flight - distance shot
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Image of the Aeromarine 40
A crashed Aeromarine 40 flying boat in the water - close up
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Image of the Aeromarine 40
A crashed Aeromarine 40 flying boat with help on the way

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Aeromarine 40 Flying Boat Trainer Biplane Aircraft appears in the following collections:
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