Tuesday, May 12, 2009

Old CFI's like me need to relearn basics

I was preparing for a little talk to some little kids about airplanes. I was to wear my old airline pilot uniform. I got a haircut. These are grade school kids. I had a handout for them made by my friend Clark who is a CFI and a very talented artist. The handout was a paper airplane ready to fold. I was thinking of adding some basic aerodynamics to the talk. I scanned the web to see what I could find that might tell "plainly" how an airplane flies. It was then that I discovered that the old "how an airplane flies" is not taught anymore. It hasn't been "fact" for a decade or so. All my life I have been trained over and over about the low pressure on top of the wing "pulling" the airplane up. Remember the molecules of air that part at the leading edge and meet together at the trailing edge? And they must travel at the same speed, and the one on top has further to travel and creates the low pressure. This never made sense to me. But I believed it because I wanted desperately to fly and I didn't understand physics anyway. Now this theory of flight has been shown to be utter nonsense. I'm so relieved. From now on when I talk to a student pilot or a kid who wants to know about planes, I can just tell them in common sense terms how the airplane flies. Things like "the plane 'planes' along in the air like a boat 'planes' on the water. That's why it's called a 'plane." gen. av. informal

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