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Aeromarine EO Turtle



The Aeromarine aluminum hulled EO was built in 1924 and first flown in that June, with a shoulder mounted 80 hp Anzani radial engine. Developed from the Aeromarine AMC, the EO was a sesquiplane, the wings were braced by V-struts.

The EO is 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 is staggered well forward of the lower wing. The wings are constructed with spruce I-beam spars and ribs with aircraft fabric covering. The hull is built with four watertight compartments. The tip floats are all-aluminum. A cross-through tube accepted a wheel assembly for ground movement.

The Aeromarine EO was designed as an updated replacement to 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.

One EO is known to have been completed in 1924, re-engined with a 90 hp Kinner K-5 in 1929 and was destroyed in a crash at Cape May NJ on 12/15/31.

The first flight tests were performed by Osborn in June 1924. The EO was used for demonstration flights for the EDO company. It then transferred ownership several times with a planned flight to Peurto Rico. It was listed as "Washed Out" at Cape May, New Jersey and its registration was cancelled on 21 January 1932.

A reported second or modification to a larger fin, and increased dihedral may have become the Edo Model B.




Aeromarine EO
Engine: 1 × Anzani 6.A.3 Double row radial, 80 hp (60 kW)
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 sq.m)
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)
Maximum speed: 65 kn; 121 km/h (75 mph)
Stall speed: 30 kn; 56 km/h (35 mph)
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)
Seats: 3



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