P.Bowers Boeing Aircraft since 1916 (Putnam)
MODEL 4 (EA) - The two EAs were the first Boeing landplanes, and were essentially Model 3s with side-by-side seating and conventional wheel undercarriage supplemented by a third 'anti-nose-over' wheel. The power plant was a 100 hp Curtiss OXX-3 engine in place of the Hall-Scott. The designation EA is believed to be a continuation of the alphabetical series of model designations (Model 2 was C, Model 3 could have been D) combined with A-for-Army since they were designed for the US Army. Although the aircraft were delivered in January 1917, the purchase contract was not signed until April, after the United States had entered WW-I.
TECHNICAL DATA - EA
Type: Trainer
Accommodation: 2 side-by-side
Power plant: Curtiss OXX-5, 100 hp
Span: 48 ft 10 in
Length: 24 ft 10 in
Wing area: 479 sq ft
Empty weight: 1,598 lb
Gross weight: 2,185 lb
Max speed: 67 mph
Cruising speed: 60 mph
Climb: 438 ft/min
Service ceiling: 7,000 ft
Range: 280 miles
C/ns: 4,5
Army serial numbers: 536, 537