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dv8	19th May 2002 15:14

sphere towed on test fights

What's it for?
Is it something to do with calibrating air data

oxford blue

19th May 2002 16:56

Possibly a radar reflector. Perfect spheres made of a radar reflective material are often used as as standard datum for calibrating radars. They are towed on a wire long enough for the reflective sphere to be isolated from the aircraft response on radar.

dv8	19th May 2002 19:05

Or somthing to do with?

Quote:

The spin chute control panel is used to deploy a ballistic parachute located in the aircraft tailcone.

http://www.airliners.net/open.file/220301/S/

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