Martin Model 145 B-16 XLRB-4
| Type | XB-16 | |
| Note | Two designs were assigned the XB-16 designation. | |
| Type | Long-range experimental bomber | |
| Purpose | To meet requirement of the U.S. Army Air Crops "Project-A" for a long-range bomber | |
| Number built/ converted | 0 | |
| Remarks | Large bomber design; canceled | |
| Design | XB-16 | XB-16A |
| Design | Model 145 Model 145A | Model 145B |
| year | 1933 | 1935 |
| Span | 140 ft (43 m) | 173 ft. 0 in. (53 m) |
| Length | 114 ft 10 in (35 m) | 115 ft. 0 in. |
| Wing area | 2,600 sq ft 241,55 m² | 4,256 sq ft 395.40 m² |
| Empty Weight | 31,957 | 50,660 lbs |
| Gross Weight | 65,000 [29,500 kg] | 104,880 lbs [47,600kg] gross |
| Engines | 4 x Allison V-1710-3 V-12 liquid-cooled piston engines, 1,000 hp (750 kW) each | 6 x Allison V-1710-3 1,000 hp each |
| Maximum speed | 235-237 mph (380 km/h; 200 kn) @ 20,000 ft (6,100 m) | 190 mph ?? 256 mph [Jones] |
| Cruising speed | 140 mph (225 km/h; 122 kn) | 140 mph |
| Landing speed | 60 mph | 77 mph |
| Combat Radius | 3,200 mi (2,780 nmi; 5,150 km)with 12,180 lb (5,520 kg) of bombs ??? | 3,300 miles with 2,500 lb. bomb load |
| Range | 5,040 miles | |
| Service ceiling | 22,500 ft (6,900 m) | |
| Rate of climb | 7,400 ft/10 min 740 ft/min (3.8 m/s) | |
| Crew | 10 | 10-11 |
| Bomb Load | 12,180 lbs [Jones] | 2,500 lbs [Jones] |
| Armament | 2 x 0.50in. machine gun | 4 flexible 0.50-in guns (nose, tail, dorsal, and ventral turrets) |
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