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From: cfiaime@ihnp4.UUCP (Jeff Williams)
Newsgroups: net.aviation
Subject: Re: When to flap
Message-ID: <729@ihnp4.UUCP>
Date: Fri, 22-Feb-85 13:11:14 EST
Article-I.D.: ihnp4.729
Posted: Fri Feb 22 13:11:14 1985
Date-Received: Tue, 26-Feb-85 06:52:09 EST
References: <651@decwrl.UUCP>, <3406@alice.UUCP>
Organization: AT&T Bell Labs, Naperville, IL
Lines: 34

Probably this should be subtitled:  "How to go around with full
flaps in a Cessna."

Fact:  with full flaps a Cessna does not climb very well.  Especially
a Cessna with 40 degrees of flap.  However, a trick that an FAA
examiner showed me helps a lot.  If you have a flap failure on a Cessna,
climb at the BOTTOM of the GREEN arc, or at Vs1 (flaps up stall speed).
The warning horn will be on, but the airplane will climb.  I was shown
this in a 1977 Cessna 172 in Kansas, OAT of around 100, and the airplane
was about 350 pounds below maximum certified gross weight.  The rate 
of climb was around 300 feet per minute.

As for flaps on a touch and go, LOOK AT THE FLAPS COMING UP BEFORE
YOU COMMIT TO YOUR TAKEOFF.  I have had flap failures in the Cessna
177 series, typically caused by a dirty or poorly adjusted micro-
switch in the flap circuit.  I have not had the 150/152, 172, or 182
fail, but it could easily happen.

One other note, some airplanes have a commit point on landing before
the wheels actually touch down.  As an example, in a twin engine airplane,
certificated under FAR part 23 (light aircraft), you can not really
expect the airplane to do a single engine go around.  Once the gear and
flaps are out on a single engine approach, plan on crashing somewhere on
the airport, either controlled or uncontrolled.  You are committed to 
land, even if you have to land off of the runway.  Now, I don't think
that full flaps in a Cessna are as firm a committment to land, but,
you should be ready to reconfigure your airplane to 20 degrees at any
time in the approach.  In addition, if you are in the flare and have 
a flap failure on a go around, consider landing straight ahead, or off
to one side of the runway.

					jeff williams
					AT&T Bell Laboratories
					ihnp4!cfiaime