Encyclopedia Astronautica
PWN-11


American sounding rocket. Version of the PWN-10 with a smaller payload dart without the transponder.

The PWN-11A used the same Super Loki rocket motor and temperature measuring instrument package as the PWN-10 probe, but had a smaller and lighter dart without a transponder unit.

Historical Essay © Andreas Parsch

Space Data PWN-11 Super Loki Datasonde

The PWN-11A uses the same Super Loki rocket motor and temperature measuring instrument package as the PWN-10 probe (q.v. for further details), but has a smaller and lighter dart without a transponder unit. Therefore the PWN-11A can reach a slightly higher apogee (80 km (50 miles) vs. 70 km (43 miles) of the PWN-10) but requires a tracking radar to get wind speed and direction data.

In the late 1990s, the PWN-11 (also known as Super Loki Rocketsonde) was still used by NASA Wallops for high-altitude weather recordings. The probe was then usually referred to as PWN-11D Datasonde(r), but this is a non-military designation (the suffix "D" was possibly chosen to mean "Datasonde").

Specifications

Note: Data given by several sources show slight variations. Figures given below may therefore be inaccurate!

Data for PWN-11A:

Length (incl. booster) 3.16 m (10 ft 4.5 in); dart: 1.16 m (45.7 in)
Diameter Booster: 10.2 cm (4 in); dart: 4.0 cm (1.58 in)
Finspan Booster: 20.3 cm (8 in); dart: 11.7 cm (4.62 in)
Weight (incl. booster) 29 kg (64 lb); dart: 6 kg (13.2 lb)
Speed ?
Ceiling 80 km (50 miles; 260000 ft)
Propulsion Aero Dyne SR110-AD-1 Super Loki solid-fuel rocket; 25 kN (5520 lb) for 2.1 s
Main Sources

[1] Richard B. Morrow, Mitchell S. Pines: "Small Sounding Rockets", Small Rocket Press, 2000
[2] Peter Alway: "Rockets of the World", Saturn Press, 1999
[3] "DOD 4120.15-L: Model Designation of Military Aerospace Vehicles", Department of Defense, 1974
[4] Upper Air Instrumentation Research Projects Website, NASA, 1997
[5] Edward J. Hopkins: "Meteorological Rockets", 1996


AKA: PWN-11; Super Loki Datasonde.

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Associated Countries
See also
  • Loki American unguided solid-propellant barrage anti-aircraft rocket adapted to use as a meteorological sounding rocket. More...

Associated Manufacturers and Agencies
  • Aerojet American manufacturer of rockets, spacecraft, and rocket engines. Aerojet, Sacramento, CA, USA. More...

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