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|National origin||United States|
|Manufacturer||Glenn L. Martin Company|
|Status||Project only – canceled|
The Martin XB-16, company designation Model 145, was a projected heavy bomber designed in the United States during the 1930s.
Design and development
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).
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 B-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)
Data from U.S. bombers, 1928 to 1980s
- 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 (225 km/h; 122 kn)
- Range: 5,000 mi (4,345 nmi; 8,047 km)
- Combat range: 3,200 mi (2,781 nmi; 5,150 km) 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
Aircraft of comparable role, configuration and era
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