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The Huff-Daland XLB-3 was one of three attempts to turn the same company’s single engined LB-1 into a twin engined aircraft. As originally built the XLB-3 was simply a LB-1 but with the engine removed from the nose and two Liberty inverted V engines mounted on the lower wing close to the fuselage. The resulting aircraft was slower than the LB-1, and could carry a smaller bomb load over a shorter range.
Huff-Daland made two more attempts to produce a twin-engined LB-1. The XLB-3 was given new engines and a new designation, becoming the Keystone XLB-3A, while different Liberty engines were used to produce the Huff-Daland XLB-5, which would enter production as the Keystone LB-5.
Engine: Two Liberty V-1410 air cooled inverted V inline engines
Power: 420hp each
Crew: 5
Span: 66ft 6in
Length: 46ft 2in
Height: 14ft 11in
Gross Weight: 12,000lbs
Maximum Speed: 105mph at sea level
Cruising Speed:
Climb rate:
Ceiling: 8,000ft
Range: 550 miles will full bomb load
Guns: Five 0.30in machine guns
Bomb load: 2,200lbs
See also: Huff-Daland Airplanes Incorporated