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From: fredc@bmcg.UUCP (Fred Cordes)
Newsgroups: net.aviation
Subject: re: spoiler and fast descents
Message-ID: <2046@bmcg.UUCP>
Date: Thu, 30-Jan-86 11:18:11 EST
Article-I.D.: bmcg.2046
Posted: Thu Jan 30 11:18:11 1986
Date-Received: Sat, 1-Feb-86 06:42:21 EST
Organization: Burroughs Corp. ASG, San Diego, CA.
Lines: 18

Some of the responses to the original posting remind me of the deep stall
experiments performed by NASA in the last few years. I saw them written up
in Aviation Leak. 

A sailplane was modified for the test. Thehorizontal stabilizer was
replaced (modified?) with a fully moving surface that could be rotated to near
vertical. The sailplane was flown into a stall and kept there. The experiment 
was to examine the use of the "stabilator" in anear vertical position to allow
good control authority in a deep stall. 

Don't remember the figures too well, but it seemed that a 40 degree descent
angle was possible. Projected use was to allow a very steep, controlled
approach that could be converted to glide and quickly to flare.

I recall that the experiment was a success. Don't know that anything came
of it. I wonder if Mooney would go for a 40 degree approach.....

fredc