Hey guys!

I´m currently assembling the 1/7 top flite p51 mustang arf, and jut managed to squeeze in the rcv 120 sp engine...

I intend to fly a 4 blade prop (www.ramoser.de), with a diameter of 16,6 inches, and a pitch of 12...(you can set the pitch of these props yourself, so no need to buy 5 different props, wich is quite handy!)
see the last page of (http://www.rcuniverse.com/forum/m_7520206/tm.htm) for some pictures (18.6 inch blades installed here...)

This prop would give me around 10 lb of thrust, and a speed of 60 miles/h according to the thrust hp software...

I will testfly it first with a standard two bladed 18x12 prop, to get familiar with the handling of the mustang however...

I will post again when I have more information on real rpm´s from the engine when I find the time to test it...

Regards,

Jens