[Ether]

Originally Posted by Daniel_LaFleur

Now lets calculate thrust.

Stall torque (again for theoretical measurements) of cim = 344 in/oz
* 23.35 (gear ratio) = 8032.4 in/oz
/20" (distance of torque) = 401.62 oz
/12 (in/ft) /16 (oz/LB) = 2.09 LBs thrust
* 4 (CIMs) = 8.367 LBf thrust

Thats low, but managable (someone check my math ... I'm terrible in the morning )

Get a cup of coffee :-)