Specifications (D-21)
- D-21A and D-21B without booster
- Wingspan: 19 ft 1/4 in (5.79 m)
- Length: 42 ft 10 in (12.8 m)
- Height: 7 ft 1/4 in (2.14 m)
- Launch weight: 11,000 lb (5,000 kg)
- Maximum speed: Mach 3.35 (2,210 mph, 1,920 knots, 3,560 km/h)
- Service ceiling: 95,000 ft (29,000 m)
- Range: 3,000 nmi, 3,450 mi, 5,550 km
- Engine: 1 x Marquardt RJ43-MA-20S4 ramjet, 1,500 lbf (6.67 kN)
Sources: Pace, Landis & Jenkins, Donald
Read more about this topic: Lockheed D-21