Eldher

I'd just like to clean up our terminology a bit, Rip. Your theory is right on, but let's keep the acronyms correct.

There is no "minimum critical airspeed". It is just "critical airspeed" required for twins to maintain stable flight with one engine. Minimum would imply some range or similar concept, and there is none.

MCA is, however, an aeronautical acronym for "Minimum Contollable Airspeed" and is an airspeed just above stall. Pilots practice flying at MCA to become familiar with the behavior and feel of the plane just before the stall. The goal, likely obvious, is to help _avoid_ a stall by being acqainted with the feel before the stall occurs and thus the pilot can take corrective action. MCA flight is also used to help the pilot learn fine control of the aircraft. The pilot will need to maintain staight and level flight as well as turn at MCA _without_ inducing a stall or loosing altitude. You learn a fine touch on the yoke and throttle doing this. MCA is set up with the airplane in both dirty and clean configurations.