May 2011 Issue

Physics 101

In April’s "Using Ground Effect," I think the author made an inaccurate and misleading statement concerning the aerodynamics of ground effect. The article wrongly asserts Newton’s equal and opposite force has different effects when operating close to the ground as opposed to at altitude. He states, "At altitude, of course, there’s no reaction between this downward forced air and the wing because there’s nothing against which it can react." If this were true, an airplane wing would not be able to fly when at altitude and only achieve lift when close to the ground.

To continue reading this entire article you must be a paid subscriber.

Subscribe to Aviation Safety

The monthly journal of risk management and accident prevention, is packed with useful, timely information on basic and advanced technique, accident analysis and, most important, practical articles on how you can develop the judgment that will keep you in the air and out of the NTSB's files.

Already subscribe but haven't registered for all the benefits of the website? Click here.

Subscriber Log In

Forgot your password? Click Here.