Originally Posted by
049flyer
Combatpigg offers good advice. You will need the equivalent of 3D power for stunt, so if electric powered you are looking at 150 watts per pound. 1 to 1 power is a good estimate.
What I'm really curious about are the ratios that the top flyers use
What triggered this curiosity was recently looking through APCs prop catalog.
Whenever they list a prop with a decimal point in the diameter number you can bet it's a competition / specialty prop.
When I saw they sell a 11.5 x 4 ....my guess was that it was for CL stunt. [well maybe RC 3D too)
By just plugging in a random rpm number to go along with that prop [let's say 14000 rpm]...the result is 10 pounds of thrust...!
The resulting speed would be 55 mph...which gives this hypothetical plane a 5 second per lap pace...so I don't think this WAG is too far off.