Martin Model 146
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| Model 146 | |
|---|---|
 Martin Model 146 during competition c. 1935, USAF photo |
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| Type | Medium bomber |
| Manufacturer | Glenn L. Martin Company |
| Designed by | Peyton M. Magruder |
| Maiden flight | 1935 |
| Introduced | 1934 |
| Status | Experimental prototype |
| Primary user | United States Army Air Corps (intended) |
| Produced | 1935 |
| Number built | 1 |
| Variants | Martin B-10 |
The Martin Model 146 was an unsuccessful American bomber design that lost to the Boeing Model 299 which spawned the famous B-17 Flying Fortress.
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[edit] Design and development
Although generally satisfied with the speed and bombload of the Martin B-10, the United States Army Air Corps procurement officials wanted a longer ranging bomber. Two competitions were held in 1934-35: one for several hundred fast bombers capable of flying 2,200 miles, and a second for the experimental prototype of a 5,000-mile bomber.
The Martin 146 was built for the first competition, competing with the Boeing Model 299 and Douglas DB-1. The Model 146 bore a striking resemblance to the earlier Martin B-10, with the same configurations of turret and cockpits and even the same two Wright Cyclone engines – "hardly positive selling points for a customer looking for the latest technology" [1].
The Model 146 was not successful but it led the Martin company to begin research into contemporary aviation technology. Some offshoots included the innovative Model 145 proposed for the long range bomber competition as well as the early studies that would lead to the Model 179 (later to emerge as the wartime Martin B-26).
[edit] Specifications (Model 146/ modified B-10A)
General characteristics
- Crew: 3
- Length: 44 ft 9 in (13.6 m)
- Wingspan: 70 ft 6 in (21.5 m)
- Height: 15 ft 5 in (4.7 m)
- Wing area: 678 ft² (63 m²)
- Loaded weight: 14,700 lb (6,680 kg)
- Max takeoff weight: 16,400 lb (7,440 kg)
- Powerplant: 2× Wright R-1820-33 "Cyclone" radials, (578 kW) each
Performance
- Maximum speed: 215 mph (187 kt, 346 km/h)
- Cruise speed: 183 mph (159 kt, 294 km/h)
- Range: 1,370 mi (1,190 nm, 2,200 km)
- Service ceiling 24,200 ft (7,380 m)
- Wing loading: 21.7 lb/ft² (106 kg/m²)
- Power/mass: 0.105 hp/lb (173 W/kg)
Armament
- Guns: 3× .300 in (7.26 mm) Browning machine guns
- Bombs: 2,260 lb (1,030 kg)
[edit] References
- Baugher, Joe. "Martin B-10". Encyclopedia of American Aircraft. [1] Access date: 4 July 2007.
- Taylor, John W. R. "Martin B-10". Combat Aircraft of the World from 1909 to the Present. New York: G.P. Putnam's Sons, 1969. ISBN 0-425-03633-2.
[edit] External links
[edit] See also
Comparable aircraft
Related lists
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