fredc@bmcg.UUCP (Fred Cordes) (01/30/86)
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