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Abmd70.165 net.columbia utzoo!decvax!duke!bmd70!jcp Tue Nov 10 00:40:57 1981 STS 1 vs STS 2

A summary of mission differences from STS 1 to STS 2

Item STS 1 STS 2 Comments Orbit Inclination 40.3 deg 38.0 deg Required for added ascent performance. Altitude 150 nm. 137 nm Lowered to offload OMS propellent Acscent Max Q 610 psf. 640 psf. Test program Acscent Madrid Coverage 4.6 min 2.2 min Lower inclination and altitude Abort to Rota, Spain NO single SSME 5 sec abort Contigency Manual out required region procedure Abort once around site Northrup AFB Edwards AFB Lower inclination Flight Duration 54.5 hr. 124.2hr Lower than expected 1, one added cyrogenic fuel tank Post deorbit Guam 7.1 min 2.9 min Lower inclination tracking Cargo Dev. flight + OSTA-1,RMS OSTA-1 - Earth viewing instruments IECM RMS - remote manipulator IECM - Induced environ- ment contam. monitor On-orbit Tests None RMS, Backup orbit navigation, Payload pointing, OSTA-1 Entry Tests None Test Manuevering, autoland to preflare, possible crosswind landing

This was digest from the November 9th issue of Aviation Week and Space Technology.

Another Columbia note:

The APU oil problem was explained as leakage of hydrazine fuel around a carbon gasket into the oil, causing a chemical reaction which produces a soapy, waxy polymer chain, which clogs the oil filter, causing it to be bypassed automatically, which will work, but is hazardous.

APU 2 was not affected by this problem, as it was a replacement for an APU which malfunctioned during STS-1 flight.

Aviation Week Note: If desired, I will submit a summary of the latest stuff in AW&ST each week, as I get it anyway, and am a regular net user.

-Joe Pistritto-

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