Martin XB-16


The Martin XB-16, company designation Model 145, was a projected heavy bomber designed in the United States during the 1930s.

Role Bomber
National origin United States
Manufacturer Glenn L. Martin Company
Status Project only – canceled

Design and developmentEdit

The XB-16 was designed to meet the United States Army Air Corps (USAAC) request for a bomber that could carry 2,500 lb (1,100 kg) of bombs 5,000 mi (8,000 km; 4,300 nmi).

The XB-16 (Model 145A) was to use four Allison V-1710 liquid-cooled reciprocating V-engines; contemporary American aircraft used air-cooled radial engines.

In 1935, Martin revised the XB-16 design as the Model 145B. The wingspan was increased from 140 ft (43 m) to 173 ft (53 m), and a set of V-1710 engines added to the trailing edge. This version had a wingspan 20% greater than that of the B-29 Superfortress, the first operational bomber that would fill the role intended for the XB-16.

The XB-16 was canceled for essentially the same reason that the Boeing XB-15 project was: it was not fast enough to meet the requirements set by the Army. Since both were canceled around the same time, Martin did not have time to produce an XB-16.

Specifications (Model 145A)Edit

Data from U.S. bombers, 1928 to 1980s[1]

General characteristics

  • Crew: ten
  • Length: 114 ft 10 in (35 m)
  • Wingspan: 140 ft (43 m)
    Model 145B: 173 ft (53 m)
  • Gross weight: 65,000 lb (29,484 kg)
    Model 145B: 104,880 lb (47,570 kg)
  • Fuel capacity: 4,238 US gal (16,040 l; 3,529 imp gal)
  • Powerplant: 4 × Allison V-1710-3 V-12 liquid-cooled piston engines, 1,000 hp (750 kW) each (Model 145B ×6)


  • Maximum speed: 237 mph (381 km/h, 206 kn) at 20,000 ft (6,100 m)
  • Cruise speed: 140 mph (230 km/h, 120 kn)
  • Range: 5,000 mi (8,000 km, 4,300 nmi)
  • Combat range: 3,200 mi (5,100 km, 2,800 nmi) with 12,180 lb (5,520 kg) of bombs
  • Endurance: 18 hours
  • Service ceiling: 22,500 ft (6,900 m)
  • Rate of climb: 740 ft/min (3.8 m/s)
  • Power/mass: 0.049 hp/lb (0.080 kW/kg)


  • Bombs: 12,180 lb (5,520 kg) of bombs

See alsoEdit

Aircraft of comparable role, configuration, and era

Related lists


  1. ^ Jones, Lloyd S. (1984). U.S. bombers, 1928 to 1980s (4th ed.). Fallbrook, CA: Aero Publishers. ISBN 978-0-81689130-6.

External linksEdit

  • USAF Museum description of XB-16
  • Martin aircraft 146 specifications