Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site infopro.UUCP
Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!whuxcc!infopro!david
From: david@infopro.UUCP (David Fiedler)
Newsgroups: net.aviation
Subject: Slipping and Cross-Control Stalls
Message-ID: <763@infopro.UUCP>
Date: Wed, 11-Sep-85 01:28:07 EDT
Article-I.D.: infopro.763
Posted: Wed Sep 11 01:28:07 1985
Date-Received: Thu, 12-Sep-85 11:20:23 EDT
Distribution: net
Organization: InfoPro Systems
Lines: 21

I am just beginning to get into slips. My instructor surprised me a bit
during a "pretend" emergency landing, by doing steep (45-degree) S-turns 
while only 75 to 150 feet off the ground. I
expressed some mild worry about stall/spins (having read a lot about same
especially at low altitudes), whereupon he noted that since our nose was
pointed down quite far, we couldn't stall (I'm not sure of our exact
airspeed at the time but it WAS at least 60 KIAS; clean stall speed on a
172 is 50). It seemed almost obvious later, and explained why you can
cross-control in a proper slip with nose down, but you would be in trouble
in more normal attitudes. My question is: since there don't seem to be any
absolutes in flying, is this true all the time, or are there some odd
combinations of weight, balance, and winds that might cause problems when
slipping? And why is it that 172s (and other planes) are placarded against
slipping with flaps down? Does it have to do with the flaps blocking
airflow to the tail section, or what?
-- 
          Dave Fiedler
{harpo,astrovax,whuxcc,clyde}!infopro!dave    People Phone: (201) 989-0570
USMail: InfoPro Systems, 3108 Route 10, Denville, NJ 07834
Flight Instructor: "What would you do if I jumped out right now?"
Student: "Close the door and retrim?"