| Manufacturer |
Northrop Corporation |
Handley Page |
| Description |
The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. |
The Handley Page HPR.7 Dart Herald is a British turboprop passenger aircraft, designed in the 1950s as a DC-3 replacement, but only entering service in the 1960s by which time it faced stiff competition from Fokker (F27 Friendship) and Avro (Avro/Hawker Siddeley HS748). |
| First Flight |
1963-04-18 |
1955-08-25 |
| Production End |
|
1968-01-01 |
| Service End |
1968-01-01 |
1987-01-01 |
| Designer |
Northrop Corporation |
Handley Page |
| Type |
Experimental aircraft |
Turboprop airliner |
| Length (m) |
22.94 |
22.86 |
| Height (m) |
7.8 |
7.3152 |
| Cockpit Crew |
|
2 |
| Max Seating |
|
56 |
| Max Speed (km/h) |
896 |
|
| Cruise Speed (km/h) |
|
442.6276 |
| Min Speed (km/h) |
|
120.3799 |
| Max Ceiling (m) |
12957 |
8503.92 |
| Rate of Climb (m/s) |
|
9.1694 |
| Capacity Description |
|
50-56 passengers, 11700 lb maximum payload |
| National Origin |
|
United Kingdom |
| Number Built |
2 |
50 |
| Powerplant Description |
2 × General Electric J79-GE-13 turbojets, 41.9 kN thrust each |
2 × Rolls-Royce RDa.7 Dart Mk.527 turboprop engines, 1570 kW (2105 hp) each |
| Primary Users |
National Aeronautics and Space Administration (NASA) |
|
| Status |
|
Retired |
| Wikipedia Article (URL) |
en.wikipedia.org/wiki/Northrop_X-21 |
en.wikipedia.org/wiki/Handley_Page_Dart_Herald |
| Flat Wing Span (m) |
28.51 |
28.6512 |
| Flat Wing Area (m²) |
116.17 |
82.3121 |
| Aircraft Engine |
General Electric J79 |
|
| Number of Engines |
2 |
2 |