| Manufacturer |
Northrop Corporation |
Glenn L. Martin Company |
| Description |
The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. |
The Martin 4-0-4 is a pressurized, all-metal, low-wing 40 passenger American airliner built by the Glenn L. |
| ICAO Code |
|
M404 |
| First Flight |
1963-04-18 |
1950-10-21 |
| Entry Into service |
|
1951-01-01 |
| Production End |
|
1953-01-01 |
| Service End |
1968-01-01 |
|
| Designer |
Northrop Corporation |
Glenn L. Martin Company |
| Type |
Experimental aircraft |
Short/medium range airliner |
| Length (m) |
22.94 |
22.5552 |
| Height (m) |
7.8 |
8.5344 |
| Cockpit Crew |
|
3 |
| Max Seating |
|
40 |
| Max Speed (km/h) |
896 |
502.1153 |
| Cruise Speed (km/h) |
|
450.6163 |
| Min Speed (km/h) |
|
130.3569 |
| Max Ceiling (m) |
12957 |
8839.2 |
| Rate of Climb (m/s) |
|
9.6774 |
| Capacity Description |
|
40 passengers |
| National Origin |
|
Canada |
| Number Built |
2 |
103 |
| Powerplant Description |
2 × General Electric J79-GE-13 turbojets, 41.9 kN thrust each |
2 × Pratt & Whitney R-2800 Double Wasp-CB16 18-cylinder two-row air-cooled radial engine, 1790 kW (2400 hp) each |
| Primary Users |
National Aeronautics and Space Administration (NASA) |
Eastern Air Lines, Trans World Airlines |
| Wikipedia Article (URL) |
en.wikipedia.org/wiki/Northrop_X-21 |
en.wikipedia.org/wiki/Martin_4-0-4 |
| Flat Wing Span (m) |
28.51 |
28.3464 |
| Flat Wing Area (m²) |
116.17 |
80.2682 |
| Wake Category |
|
M |
| Aircraft Engine |
General Electric J79 |
Pratt & Whitney R-2800 Double Wasp |
| Number of Engines |
2 |
2 |