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