JGalban via AviationKB.com wrote:
Dudley Henriques wrote:

Considering this, there should NEVER be a need to pull the mixture on a
student. Doing this can easily turn a practice session into an actual
forced landing.

I agree about stopping the prop. I have done it before, but only to
satisfy my curiosity about performance differences between stopped and
windmilling. I did it over a deserted airport with a long runway (actually 3
long runways).

I am curious about pulling the mixture, though. The only difference
between pulling the throttle and pulling the mixture is that one cuts off air
to the engine and the other cuts off fuel. Since pulling the mixture cuts
off the fuel, it keeps the engine and plugs from loading up as much. In
practice (at least in Cherokees and 172s), I've found that the prop is not
going to stop when the mixture is pulled, unless the plane gets within a few
knots of stall speed.

I'm not a CFI, but I do practice engine out landings on a regular basis
(religiously, since my real engine out). I prefer pulling the mixture to
idle cutoff as a means of simulating the power loss, just because it keeps
the plugs cleaner. Power recovery is as simple as pushing the mixture back
in and verifying that the throttle is full forward. Is there something I'm
not thinking of?

John Galban=====N4BQ (PA28-180)


Pulling to ICO is simply not necessary to teach forced landings. Doing
it is just asking for possible trouble. Bottom line is that the pros
just don't outweigh the potential cons.
It's just not a practice I have ever recommended.
DH

--
Dudley Henriques