Calculating thrust and stall speed
 

The thrust and stall speed calculators can be downloaded from the following web sites. Just enter the appropriate info for your plane (weight,wing area), RPM at max and idle, dia and pitch . The lift coefficient is assumed to be 1.3 for most model planes. Takeof thrust should be at least 1/3 of plane weight. Cruisng speed is ~ X2 stall speed. To have the propeller act as a break when landing, the RPM (speed) at idle should be approximately half of the stall speed.
http://www.bmaps.net/software/goodies.html Calculates engine thrust

http://www.wright-flyer.net/desertav...rcalcdesc.html Stall calculator.
Let me know if this is helpful. I found it very good info for my Moki 1.35 on my AT-6.
Happydog