Jon S Berndt writes: > Any suggestions?
This kind of thing is always hit-or-miss with me, since I don't have a physics background. Basically, when a fixed-pitch propeller is spinning slower than its advance speed (is that the right term?), the propeller starts producing torque from the airstream, and the cost of increased drag. For example, when I pull my power to idle on the ground, my propeller will slow to around 650 rpm. When I'm approaching at 70 kias (~118 fps) and I pull the power to idle, the propeller will not go slower than about 1100-1200 rpm, and the plane experiences significant extra drag. I have a 60-inch-pitch prop (advance 60 inches for each revolution), so at 118 fps, its neutral speed is about 24 rps or 1450 RPM. All the best, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
