| Manufacturer |
Douglas Aircraft Corporation |
Glenn L. Martin Company |
| Description |
The Douglas XB-19 was a four-engined, piston-driven heavy bomber produced by the Douglas Aircraft Company for the United States Army Air Forces (USAAF) during the early 1940s. |
The Martin JRM Mars is a retired large, four-engined cargo transport flying boat designed and built by the Martin Company for the United States Navy (US Navy). |
| ICAO Code |
|
MARS |
| First Flight |
1941-06-27 |
1942-06-23 |
| Entry Into service |
|
1943-11-30 |
| Production End |
|
1948-01-01 |
| Service End |
1946-08-17 |
1956-01-01 |
| Designer |
Douglas Aircraft Corporation |
Glenn L. Martin Company |
| Type |
Heavy bomber |
Flying boat |
| Length (m) |
40.2336 |
35.6616 |
| Height (m) |
12.8016 |
11.5824 |
| Cockpit Crew |
16 |
|
| Max Seating |
|
133 |
| Max Speed (km/h) |
360.4931 |
355.665 |
| Cruise Speed (km/h) |
217.2614 |
305.7754 |
| Max Ceiling (m) |
7010.4 |
4450.08 |
| Rate of Climb (m/s) |
3.302 |
|
| Armament |
:*5 × 0.5 in M2 Browning machine guns :*6 × 0.3 in M1919 Browning machine guns :*2 × 37 mm M4 autocannon; 18700 lb internal; maximum bomb load of 37100 lb including external racks with reduced fuel load |
|
| Capacity Description |
|
JRM Mars - 133 troops, or 84 litter patients and 25 attendants or 32,000 lb payload, including up to seven Willys MB jeeps; Water/foam load: Mars waterbomber - 60,000 lb |
| National Origin |
United States of America |
United States of America |
| Number Built |
1 |
7 |
| Powerplant Description |
4 × Wright R-3350-5 Duplex Cyclone 18-cylinder air-cooled radial piston engines, 1491 kW (2000 hp) each |
4 × Wright R-3350 Duplex-Cyclone 18-cylinder radial engines, 1864 kW (2500 hp) each |
| Primary Users |
United States Army Air Corps |
United States Navy (historical), Forest Industries Flying Tankers (FIFT) (historical); Coulson Aviation (historical) |
| Status |
Scrapped |
Retired |
| Wikipedia Article (URL) |
en.wikipedia.org/wiki/Douglas_XB-19 |
en.wikipedia.org/wiki/Martin_JRM_Mars |
| Flat Wing Span (m) |
64.6176 |
60.96 |
| Flat Wing Area (m²) |
398.0895 |
342.4406 |
| Wake Category |
|
M |
| Aircraft Engine |
|
Wright R-3350 Duplex-Cyclone |
| Number of Engines |
4 |
4 |