ORIGINAL: Sport_Pilot
Dave Platt may have started the myth, but repeating this certainly doesn't bust it. Myth's are often started by famous people who don't think they have to prove themselves giving out tidbits as advice or trueism's. They may be true or not. To bust a myth you have to show proof, such as wind tunnel data, other lab data, calculations, or experments.
Context is important. What 'works' or holds true in one modelling discipline may be completely different in another. This leads to misapplications...
The windmilling prop debate is an example. Stopping the prop is less draggy in most RC stuff. Yet in Free flight Rubber it's less draggy to to let it freewheel. So the 'rules' have to be correctly applied to the specific model or aerodynamic task in hand.