RCU Forums - Prop MPH Chart

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<div style="margin: 0in 0in 0pt"><span style="font-size: 9pt">I got a graphing program and was playing with it today here is a chartI madethat shows the theoretical MPH for a given RPM. Obviously your plane will not fly that fast but it gives you an idea of the speed of the thrust coming from the prop. It does kind of illustrate how the lower pitch props will let the plane slowdown at idle. There is likely a formula of the given MPH the model would approximately fly but I would think it would be widely different for wing profiles and airplane bulkiness. It would be interesting to get an idea maybe someone from the extreme speed forum has an idea but I don’t. I did put a gps in my plane that recorded max speed at 72 mph,the plane was spinning a 10x7 at 14500 rpm on the ground. </span></div>

RE: Prop MPH Chart

Yeah, pretty cool. I normally just do the math, however, considering my background, I wonder why I ddin't think of that.. [X(] ;)

Don't go there, Mike.. [sm=48_48.gif] :D

Nice job!!

CGr.

RE: Prop MPH Chart

Quote:

ORIGINAL: CGRetired
I wonder why I ddin't think of that.. [X(] ;)

Old age and improper living, I'm sure. http://www.rcuniverse.com/forum/js/f...sn/biggrin.gif

(You didn't say a WORD about ME not going there!)<br type="_moz" />

RE: Prop MPH Chart

Ha... you got me there, Gordon... :D

BTW... I work with several pilots. One, my co-worker, is quite an accomplished pilot, with multiple ratings. He swears by Stick and Rudder, as do all of the other pilots I work with. I'm glad you recommended it to me.

CGr.