Aeromarine 39

Aeromarine 39
Role - Land or water-based trainer
Manufacturer - Aeromarine Plane and Motor Company
Primary user - United States Navy
Number built - 150

The Aeromarine 39 was an American two-seat training seaplane ordered by the US Navy in 1917 and built by the Aeromarine Plane and Motor Company of Keyport, New Jersey. Of conventional biplane configuration and construction, the aircraft was designed so that its pontoons could be speedily detached and replaced with wheeled undercarriage for shore operations.
History
Fifty of the original design (later referred to as the 39A) were produced, featuring twin floats and powered by a Hall-Scott A-7 engine. A redesign followed, increasing the wingspan to create more lift for water take-offs. This became known as the 39B. Other changes included a change to a single pontoon with outrigger floats, an enlarged vertical tail, and a change of powerplant to the Curtiss OXX.
On October 26, 1922 Godfrey DeCourcelles Chevalier landed a 39B on a moving ship, USS Langley, the first time this had been achieved on an American aircraft carrier. Trials of underway carrier takeoffs and landings continued through 1922 and 1923.
Survivors
An example of a 39B is preserved at the Old Rhinebeck Aerodrome, although it has been severely damaged by two fires, one in 1966 and one in the early 1980s.

Operators
1) United States
United States Navy

Specifications (Aeromarine 39B)

General characteristics
Length: 30 ft 4.25 in (9.25 m)
Wingspan: 47 ft 0 in (14.32 m)
Height: 13 ft 2 in (4.01 m)
Wing area: 494 sq ft (45.89 m2)
Empty weight: 1,939 lb (880 kg)
Gross weight: 2,050 lb (931 kg)
Max takeoff weight: 2,505 lb (1,136 kg)
Powerplant: 1 × Curtiss OXX-6 Vee piston, 100 hp (75 kW)
Performance
Maximum speed: 73 mph (117 km/h, 63 kn)
Range: 273 mi (439 km, 237 nmi)
Service ceiling: 8,200 ft (2,500 m)
Power/mass: 0.049 hp/lb (80 W/kg)

Aeromarine 40

Aeromarine 40F
Role - Flying-boat trainer
Manufacturer - Aeromarine Plane and Motor Company
First flight - 1919
Primary user - United States Navy
Number built - 50

The Aeromarine 40F was an American two-seat flying-boat training aircraft produced for the US Navy and built by the Aeromarine Plane and Motor Company of Keyport, New Jersey. Fifty out of an original order for 200 were delivered before the end of World War I, with the remainder cancelled due to the armistice.
The aircraft was a biplane with a pusher propeller. The pilot and instructor sat side by side. The Aeromarine 41 developed from the Aeromarine 40. At least some of the Model 40s were later converted to Model 41s.

Operators
1. Brazil
Brazilian Naval Aviation
2. United States
United States Navy

Variants
Model 40, 40B - Civilian 140 hp Hispano Suiza
Model 40C - 150 hp Aeromarine
Model 40L - 140 hp Aeromarine L
Model 40T - 100 hp Curtiss OXX-6
Model 40U - 100 hp Aeromarine U-6

Specifications (40F)

General characteristics
Crew: two, pilot and instructor
Length: 28 ft 11 in (8.8 m)
Wingspan: 48 ft 6 in (14.8 m)
Height: m ( ft in)
Wing area: ft2 ( m2)
Empty weight: 2,061 lb (935 kg)
Maximum weight: 2,592 lb (1,175 kg)
Powerplant: 1 × Curtiss OXX V-8, 100 hp (72 kW)
Performance
Maximum speed: 71 mph (114 km/h)
Range: 250 miles (403 km)
Service ceiling: 3,500 ft (1,067 m)
Rate of climb: ft/min (m/min)

Aeromarine 50

Aeromarine 50
Role - Seaplane
National origin - United States
Manufacturer - Aeromarine
First flight - 1919
Introduction - Chicago Air Show

The Aeromarine 50, also called the Limousine Flying Boat, was a luxury seaplane.
Design and development
After the First World War, Aeromarine had completed over 300 aircraft. Production was centered on seaplanes for sport and commercial use. President Inglis M. Uppercu, marketed the seaplane based in its luxury interior.
The aircraft was a biplane seaplane with a two-pilot open cockpit and enclosed seating for three passengers. The engine was mounted in a pusher configuration.
Operational history
One Aeromarine 50 was purchased by Aero Limited for New York-Atlantic City flights. Aeromarine Airways also operated Model 50 flying boats.

Variants
Aeromarine 50B
Fully enclosed variant.
Aeromarine 50C
150 hp (112 kW) Hispano Suiza powered version.
Aeromarine 50 "S"
A commercial passenger variant.

Specifications (Aeromarine 50)
Data from Mississippi Valley Magazine

General characteristics
Crew: 2
Capacity: 3
Upper wingspan: 48 ft 6 in (14.78 m)
Lower wingspan: 37 ft 8 in (11.48 m)
Height: 12 ft 7 in (3.84 m)
Empty weight: 2,280 lb (1,034 kg)
Gross weight: 3,000 lb (1,361 kg)
Fuel capacity: 40 U.S. gallons (150 L; 33 imp gal)
Powerplant: 1 × Aeromarine V-8 , 130 hp (97 kW)
Performance
Maximum speed: 65 kn (75 mph, 121 km/h)
Stall speed: 38 kn (44 mph, 71 km/h)
Endurance: 3.5 hr
Rate of climb: 220 ft/min (1.1 m/s)

Felixstowe F5L
(Aeromarine 75)

F5L
Role - Military flying boat
National origin - United Kingdom
Manufacturer - Naval Aircraft Factory (137) / Curtiss Aircraft (60) / Canadian Aeroplanes Limited (30)
Designer - John Cyril Porte
First flight - 15 July 1918
Introduction - November 1918
Retired - 1928
Primary users - United States Navy / Aeromarine Plane and Motor Company (Aeromarine 75)
Number built - 227
Developed from - Felixstowe F.5
Variants - Naval Aircraft Factory PN

The twin-engine F5L was one of the Felixstowe F series of flying boats developed by John Cyril Porte at the Seaplane Experimental Station, Felixstowe, England, during the First World War for production in America.
A civilian version of the aircraft was known as the Aeromarine 75.
Design and development
Porte had taken the Curtiss H-12, an original design by the American Glenn Curtiss, and developed it into a practical series of flying boats at the Felixstowe station. They then took their F.5 model and further redesigned it with better streamlining, a stronger hull using veneer instead of doped linen and U.S.-built 330 hp (later 400 hp) Liberty 12A engines. The prototype was built and tested in England and the design then taken over by the Naval Aircraft Factory, Philadelphia, where further modifications were made to suit their production methods under wartime conditions. The American-built version was also known as the Curtiss F5L and (in civilian operation) as the Aeromarine 75.
The F5L was built by the Naval Aircraft Factory (137), Curtiss (60) and Canadian Aeroplanes Limited (30). Some were converted for civilian use by the Aeromarine Plane and Motor Company in 1919.
Operational history
The F5L entered U.S. service at the end of the war and was the U.S. Navy's standard patrol aircraft until 1928, when it was replaced by the PN-12. In civil service, named the Aeromarine 75, the Felixstowe F5L could accommodate 10 passengers and was operated by Aeromarine Airways on flights from Key West to Havana, carrying the first U.S. Post Office international air mail on flights from New York City to Atlantic City, and from Cleveland to Detroit.

Operators
1) Argentina
Argentine Naval Aviation
2) Brazil
Brazilian Naval Aviation - Curtiss F5L
3) United States
United States Navy
Aeromarine Airways

Accidents and incidents
On 13 January 1923, the Aeromarine Airways Aeromarine 75 Columbus suffered engine failure during a flight from Key West to Havana and landed in the Florida Strait. Buffeted by 10-to-15-foot (3-to-4.5-metre) waves, its hull began to fill with water. Four passengers died, but the ferry ship H. M. Flagler saved the other three passengers and both crew members.
Survivors
Both a hull and float from a US Navy F5L are preserved at the National Air and Space Museum (Smithsonian). The hull is only partially skinned with wood to reveal structure. Both artefacts are presently in storage and not available for public display.

Specifications
Data from Flight 31 July 1919, Smithsonian National Air and Space Museum:Felixstowe

General characteristics
Crew: 4
Capacity: 5,224 lb (2,370 kg) useful load
Length: 49 ft 4 in (15.04 m)
Upper wingspan: 103 ft 9.25 in (31.63 m)
Lower wingspan: 74 ft 4 in (22.66 m)
Height: 18 ft 9.25 in (5.72 m)
Wing area: 1,394 sq ft (129.5 m2)
Empty weight: 8,720 lb (3,955 kg)
Gross weight: 14,334 lb (6,502 kg)
Powerplant: 2 × Liberty L-12A V-12 water-cooled piston engines, 400 hp (300 kW) each
Propellers: 2-bladed fixed-pitch propellers
Performance
Maximum speed: 90 mph (140 km/h, 78 kn)
Cruise speed: 74 mph (119 km/h, 64 kn)
Stall speed: 57 mph (92 km/h, 50 kn)
Range: 830 mi (1,340 km, 720 nmi)
Rate of climb: 260 ft/min (1.3 m/s)
Time to altitude: 2,600 ft (792 m) in 10 minutes
Wing loading: 9.5 lb/sq ft (46 kg/m2)
Armament
Guns: 2 x machine guns
Bombs: provision for bombs

Related development
Felixstowe F.2
Felixstowe F.5
Naval Aircraft Factory PN
Hall PH

Aircraft of comparable role, configuration, and era
Phoenix P.5 Cork
Vickers Valentia
Supermarine Swan
English Electric Kingston
Hiro H1H
Supermarine Southampton

Aeromarine 700

Model 700
Role - Floatplane
National origin - United States of America
Manufacturer - Aeromarine
First flight - 1917
Primary user - US Navy
Number built - 2

The Aeromarine 700 was an early US Navy seaplane developed in 1917 to investigate the feasibility of using aircraft to launch torpedoes. The aircraft itself was a large biplane of conventional three-bay configuration equipped with two pontoons, powered by a 100 hp (75 kW) Aeromarine K-6. Only two examples were built.

Operators
1. United States
US Navy

Aeromarine AM-1

AM
Role - Mail plane
National origin - United States of America
Manufacturer - Aeromarine
Designer - Paul Zimmerman
First flight - September 1923
Developed from - Aeromarine AMC

The Aeromarine AM-1 was a biplane built to pursue a US Air Mail Service requirement for a nighttime transport.
Design and development
The AM-1 was completed 122 days from the announcement of a 1924 requirement for a nighttime mail plane capable of hauling 300 lb (136 kg) of mail. The contest was lost to Douglas aircraft.
The AM-1 was a biplane with conventional landing gear, it featured an all-metal fuselage with metal covering .32 in (8.13 mm) thick. The engine was fully cowled with the exhaust stacks stretching behind the pilot. The water-cooled engine used a centrally mounted radiator mounted above the top wing for visibility. Two streamlined fuel tanks sat on top of the wings. The upper wing was larger than the lower wing, each using spruce spars. The tail surfaces were aluminum framed with fabric covering. Many components were common with the design of the Aeromarine AMC flying boat.

Variants
Aeromarine AM-1
Base version.
Aeromarine AM-2
A slight redesign to address nose drop with engine out, and drag. The aircraft was the same as an AM-1 except the radiator was relocated under the fuselage.
Aeromarine AM-3
Radiator moved to the front of the engine, tested with 350hp engine, found to be under-performing.

Specifications (Aeromarine AM-1)
Data from Skyways

General characteristics
Capacity: 1
Length: 32 ft 11 in (10.03 m)
Upper wingspan: 50 ft (15 m)
Lower wingspan: 45 ft 10 in (13.97 m)
Height: 12 ft 9 in (3.89 m)
Wing area: 541 sq ft (50.3 m2)
Airfoil: Aeromarine airfoil section 2A
Empty weight: 2,875 lb (1,304 kg)
Gross weight: 4,450 lb (2,018 kg)
Fuel capacity: 100 US gallons (380 l; 83 imp gal)
Powerplant: 1 × Liberty 12 12 cylnder, 400 hp (300 kW)
Propellers: 2-bladed, 9 ft 6 in (2.90 m) diameter
Performance
Maximum speed: 100 kn (115 mph, 185 km/h)
Stall speed: 39 kn (45 mph, 72 km/h)
Endurance: 3 hrs
Service ceiling: 17,000 ft (5,200 m) service
Rate of climb: 800 ft/min (4.1 m/s)
Wing loading: 8.27 lb/sq ft (40.4 kg/m2)

Aeromarine AMC

AMC (Aeromarine Metal Commercial)
Role - Commercial flying boat
National origin - United States
Manufacturer - Aeromarine
First flight - 1 June 1923
Introduction - 1923
Number built - 1

The Aeromarine AMC was the first American all-metal hulled commercial flying boat.
Development
Design work on the AMC started in 1921 with the goal of producing an aluminum-hulled flying boat that would be more durable than contemporary all-wood construction. Aeromarine's wooden-hulled boats required drying out when waterlogged. The excess weight of a waterlogged hull could be as much as 456 lb. A model of the AMC was wind-tunnel tested at MIT before choosing an open cockpit design.
Design
The AMC was a two-bay biplane flying boat with an aluminum hull. The spruce woodspar wings were fabric covered with small tip floats for stability. The engine was mounted just below the top wing in a pusher configuration with a forward-mounted radiator. Two 50-gallon streamlined main fuel tanks sat on the top wing on either side of the engine with a 70-gallon fuselage-mounted reserve. The hull was constructed of eighteen forms and five watertight bulkheads. It had two rows of small bench seats for passengers in the front. The pilot and mechanic sat slightly raised in individual open cockpits behind the passengers, beneath the main wing. The hull used Alcoa 17S aluminum treated with potassium nitrate with Canton flannel/Asphalt watertight seals and Valspar aluminum paint.
Operational history
The AMC was intended to replace the Aeromarine 75 flying boats used by Aeromarine Airways in service between New York, San Juan, and Puerto Rico. Within three days of its first flight on 1 June 1923, the aircraft was flown from Keyport, New Jersey to New York to try to find additional customers. The aircraft flew 800 passengers on 186 flights before delivery to Aeromarine Airways in December 1923. The aircraft was christened the Morrow Castle II and flew on record-setting long-distance flights between New Jersey, Cuba, San Juan, and Puerto Rico totalling fifteen thousand miles before returning to New Jersey. Aeromarine ceased service in late 1924, without a customer base for sales, only the one AMC was completed.
The sole AMC was sold to Fairchild Air Transport (Fairchild Aerial Surveys Co of Canada Ltd ) on 25 May 1926 for use on Canadian passenger service and aerial photography. It was dismantled on 28 February 1930.

Specifications (AMC)
Data from Skyways

General characteristics
Crew: two
Capacity: five-seven
Length: 35 ft 10 in (10.92 m)
Upper wingspan: 65 ft (20 m)
Lower wingspan: 48 ft 6 in (14.78 m)
Height: 13 ft 6 in (4.11 m)
Airfoil: (upper) Aeromarine No. 6, (lower) Aeromarine No. 2
Empty weight: 3,660 lb (1,660 kg)
Max takeoff weight: 6,100 lb (2,767 kg)
Fuel capacity: 170 U.S. gallons (640 L; 140 imp gal)
Powerplant: 1 × Liberty L-12 , 400 hp (300 kW)
Propellers: 2-bladed
Performance
Maximum speed: 91.1 kn (104.8 mph, 168.7 km/h)
Cruise speed: 70 kn (80 mph, 130 km/h)
Stall speed: 41 kn (47 mph, 76 km/h)
Endurance: 7 hours
Service ceiling: 14,000 ft (4,300 m)
Rate of climb: 3,300 ft/min (17 m/s)

Aeromarine AS

AS
Role - Scout Biplane
National origin - United States
Manufacturer - Aeromarine
Primary user - US Navy
Number built - 3 (1 AS-1, 2 AS-2)

The Aeromarine AS was a seaplane fighter aircraft evaluated by the US Navy in the early 1920s.
Development and design
Other than the vertical stabilizer, it was configured as a conventional two-bay biplane on twin pontoons, with two seats. The sole example of the original design, designated AS-1 had an inverted fin. After evaluation testing, the Navy ordered two aircraft, designated AS-2. The AS-2 had cruciform tails and larger radiators, and ailerons on both upper and lower wings.

Variants
A.S.-1 1 built
A.S.-2 2 built

Specifications (AS-1)
Data from Angelucci, 1987. pp. 35-36.

General characteristics
Crew: 2
Length: 30 ft 10 in (9.40 m)
Wingspan: 37 ft 6 in (11.43 m)
Height: 10 ft 10 in (3.30 m)
Wing area: 386 sq ft (35.9 m2)
Empty weight: 2,298 lb (1,042 kg)
Gross weight: 3,233 lb (1,466 kg)
Powerplant: 1 × Wright-Hispano E , 300 hp (220 kW)
Performance
Maximum speed: 117 mph (188 km/h, 102 kn)
Stall speed: 56 mph (90 km/h, 49 kn)
Endurance: 3 h
Service ceiling: 16,000 ft (4,900 m)
Rate of climb: 750 ft/min (3.8 m/s)
Armament
2x machine guns

Aeromarine AT

AT
Role - Biplane transport
National origin - United States
Manufacturer - Aeromarine
Produced - 0

The Aeromarine AT (Army Transport) was a proposed passenger biplane from Aeromarine.
Design
The Aeromarine AT was a six-passenger enclosed biplane with an open cockpit for the pilot. The aircraft featured an upper wing with a large nine-foot chord, and a thinner lower wing with a two-foot chord. The cabin featured oval windows with a small overwing cabin door.

Specifications (AT)
Data from Skyways

General characteristics
Crew: 1
Capacity: 6
Length: 38 ft 9 in (11.81 m)
Height: 13 ft 3 in (4.04 m)
Propellers: 2-bladed

Aeromarine BM-1

BM-1
Role - Mail plane
National origin - United States
Manufacturer - Aeromarine
Designer - Boris v. Korvin-Kroukovsky
Status - Design stage only
Number built - none

The Aeromarine BM-1 was a new mail plane design to meet a request for proposal by the US Postal Service.
Design and development
Aeromarine developed the AM-1, AM-2, and AM-3 designs in 1923 for an earlier proposal. The BM-1 was a clean-sheet design for the new effort.
The BM-1 was a single place biplane with conventional landing gear and a steerable tail skid. The aircraft used a dropable main fuel tank between the main gear to meet crashworthiness requirements and a small header tank of 10 gallons in the upper wing. Control cables were designed not to use pulleys. The wings had optional metal or wood spars with doped aircraft fabric covering. The fuselage used an all-metal aluminum girder structure with aluminum covering. The horizontal stabilizer used a jack screw for trim adjustment. The engine featured a radiator mounted to the front with a pass-through for the propeller shaft.
The BM-1 did not progress beyond design phase.

Specifications (Aeromarine BM-1)
Data from Skyways

General characteristics
Crew: 1
Length: 30 ft 6 in (9.30 m)
Upper wingspan: 47 ft (14 m)
Lower wingspan: 44 ft (13 m)
Height: 11 ft (3.4 m)
Wing area: 514 sq ft (47.8 m2)
Airfoil: Aeromarine airfoil series 2a
Empty weight: 2,822 lb (1,280 kg)
Gross weight: 4,755 lb (2,157 kg)
Fuel capacity: 100 U.S. gallons (380 L; 83 imp gal)
Powerplant: 1 × Liberty 12 , 420 hp (310 kW)
Performance
Maximum speed: 109 kn (125 mph, 201 km/h)
Stall speed: 43 kn (50 mph, 80 km/h)
Service ceiling: 17,000 ft (5,200 m)
Rate of climb: 850 ft/min (4.3 m/s)

Aeromarine EO

EO
Role - Seaplane
National origin - United States
Manufacturer - Aeromarine Plane and Motor Company
First flight - June 1924
Number built - 1
Developed from - Aeromarine AMC

The Aeromarine EO was a light sport flying boat that was built in the mid-1920s.
Design and development
The Aeromarine EO was designed as an updated replacement of the Aeromarine Model 44 for the customer Earl Dodge Osborn. Osborn was a former accountant for Aeromarine, assistant editor of Aviation magazine and future founder of Edo Aircraft Corporation. The aluminum hull was scaled down from the Aeromarine AMC design, offering advantages in durability, weight and the inability to become waterlogged.
The EO was an open-cockpit aluminum-hulled biplane seaplane with a single tractor engine center mounted in a nacelle on the top wing which also housed the fuel tank and oil tank. The upper wing was staggered well forward of the lower wing. The wings were constructed with spruce I-beam spars and ribs with aircraft fabric covering. The hull was built with four watertight compartments. The tip floats were all-aluminum. A cross-through tube accepted a wheel assembly for ground movement.
Operational history
The first flight tests were performed by Osborn in June 1924. The sole EO was used for demonstration flights for the EDO company. It then transferred ownership several times with a planned flight to Puerto Rico. It was listed as "Washed Out" at Cape May, New Jersey and its registration was cancelled on 21 January 1932.

Specifications (Aeromarine EO)
Data from Skyways

General characteristics
Crew: one
Capacity: two
Length: 25 ft 2 in (7.67 m)
Upper wingspan: 38 ft (12 m)
Lower wingspan: 34 ft (10 m)
Height: 8 ft 7 in (2.62 m)
Wing area: 145 sq ft (13.5 m2)
Airfoil: Aeromarine Nbr. 2a upper, Aeromarine Nbr. 6 lower
Empty weight: 1,040 lb (472 kg)
Gross weight: 1,750 lb (794 kg)
Fuel capacity: 25 U.S. gallons (95 L; 21 imp gal)
Powerplant: 1 × Anzani 6.A.3 Double row radial, 80 hp (60 kW)
Performance
Maximum speed: 65 kn (75 mph, 121 km/h)
Stall speed: 30 kn (35 mph, 56 km/h)
Endurance: 4 hours
Service ceiling: 16,500 ft (5,000 m)
Rate of climb: 280 ft/min (1.4 m/s)
Wing loading: 6.58 lb/sq ft (32.1 kg/m2)

Aeromarine M-1

M-1
Role - Trainer
National origin - United States
Manufacturer - Aeromarine
Designer - Charles F. Willard
First flight - 1917
Primary user - Aviation Section, U.S. Signal Corps
Number built - 6
Variants - Aeromarine 39

The Aeromarine M-1 was a two-seat training biplane ordered by the US Army's Aviation Section, U.S. Signal Corps (USAAS) in 1917 and built by the Aeromarine Plane and Motor Company of Keyport, New Jersey.
Design and development
Originally known as Aeromarine Training Tractor, Aeromarine's chief designer, Charles F. Willard, designed a two place trainer in both land-plane and seaplane configuration. The land plane was designated the Aeromarine M-1 and was produced to US Army Specification No.1001. The seaplane version was later called the Aeromarine 39 and sold to the United States Navy (USN). Both aircraft shared much in common, aside from the undercarriage, the primary difference was that the M-1's wingspan was shorter than the Aeromarine 39.
Operational history
Six aircraft were produced and assigned serial numbers 265/270. During Army testing, the aircraft proved to be unsuitable for a training. "Preliminary tests showed that the M1 was unstable in anything but level flight, and most spent the war years packed in their crates."
In 1920, there was a proposal to re-engine these aircraft with the Aeromarine 100hp motor.

Specifications (Aeromarine M-1)

General characteristics
Crew: 2
Length: 25 ft 6 in (7.77 m)
Upper wingspan: 37 ft 0 in (11.28 m)
Lower wingspan: 33 ft 0 in (10.06 m)
Wing area: 425 sq ft (39.5 m2)
Airfoil: RAF 6
Empty weight: 1,200 lb (544 kg)
Gross weight: 1,900 lb (862 kg)
Powerplant: 1 × Hall-Scott A-7 4-cylinder water-cooled in-line piston engine, 100 hp (75 kW)
Propellers: 2-bladed
Performance
Maximum speed: 78 mph (126 km/h, 68 kn)
Time to altitude: 10 minutes to 3,500 ft (1,066.80 m)

Aeromarine PG-1

PG-1
Role - Pursuit and ground attack aircraft
National origin - United States
Manufacturer - Aeromarine
Design group - U.S. Army Engineering Division
First flight - 22 August 1922
Number built - 3

The Aeromarine PG-1 was an American single-seat pursuit (fighter) and ground attack (PG) biplane developed by the Engineering Division of the United States Army and manufactured by the Aeromarine Plane and Motor Co.
Development and design
The PG-1 was intended to fulfill both ground strafing and aerial defense roles, the contract for construction was won by Aeromarine in May 1921.
Armed with a single 0.5 in (12.7 mm) machine gun as well as a 37 mm Baldwin cannon firing through the propeller hub; the cockpit had 1⁄4-inch (6.35 mm) armour. The wings were dissimilar, with a wide-chord upper wing with ailerons, and a closely spaced narrow-chord lower plane with dihedral that placed the tips close to the upper wing. The upper wing was mounted close to the top of the fuselage with a cut-away forward section to accommodate the cockpit, and attached to the lower plane via V-type struts.
Power was to have been provided by the eight-cylinder, water-cooled 330 hp (250 kW) Wright K-2 engine but the first two prototypes were fitted with 346 hp (258 kW) Packard 1A-1116 units due to delays in clearing the K-2 for flight testing. A third prototype was also built and testing was eventually carried out using both the K-2 and Packard 1A-1237 at McCook Field. Prototype aircraft suffered disappointing performance, high levels of vibration and poor visibility. The aircraft had a tendency to spin when stalled. Development was abandoned in 1922.

Specifications
Data from Angelucci, 1987. pp. 35-36.

General characteristics
Crew: 1
Length: 24 ft 6 in (7.47 m)
Wingspan: 40 ft 0 in (12.19 m)
Height: 8 ft 0 in (2.44 m)
Wing area: 389 sq ft (36.1 m2)
Empty weight: 3,030 lb (1,374 kg)
Gross weight: 3,918 lb (1,777 kg)
Powerplant: 1 × Packard 1A-1116 , 346 hp (258 kW)
Performance
Maximum speed: 130 mph (210 km/h, 110 kn)
Range: 195 mi (314 km, 169 nmi)
Service ceiling: 19,000 ft (5,800 m)
Rate of climb: 684 ft/min (3.47 m/s)
Armament
Guns: 1x 37 mm (1.457 in) Baldwin cannon + 1x 0.50 in (12.7 mm) machine gun

Aeromarine aircraft
1909 Flying Boat / 8 / 39 / 40 / 50 / 52 / 55 / 75 / 80 / 85 / 700 / AM-1 / AM-2 / AM-3 / AMC / AS / BM-1 / CO-L / DH-4B / EO / ED0 Model B / HS / M1 / NBS-1 / PG-1 / WM / Limousine Flying Boat / Navy Flying Cruiser / Messenger / Sea Scout / Seaplane / Sportsman
Aero engines - 85 hp / AR-3 / AR-3-4 / AR-5 / B-45 / B-90 / D-12 / K-6 / L-6-D / L-6-G / L8 / RAD / T-6 / U-6 / U8D