Originally Posted by
Uplinker
Ah, OK, I see.
Just for my interest, why then is there a mixture control at all ? In what circumstances is it used ?
To cut the fuel supply to the engine entirely when stopped, and to allow fuel to flow when the engine is running. So it should be moved at startup to "on' and at shutdown to "off" and at no other time.
There's no procedure, as in fixed wing, to allow the engine to be leaned if at a high altitude strip. In the R22/R44, it's either in or out, on or off, nothing in between.