Hi,

I'll try to answer all the questions.

Steve,

I overheated a motor running a 24-12 prop, which is too much load on the motor. However, I would be concerned about trying to cool the motor with just the cheek cowl inlets. I am now using a 3" spinner on the Partner which opens up a gap between the fuse and the spinner, letting air in around the spinner. I also use the chin cowl inlet with a baffle to direct the air up to the motor. I have had no motor temp problems with this arrangement even on 95 -100 degree days. Too much cooling is always better then too little. I would try to run the motor no more then 150-160 degrees.

foofydoo,

I think you might have real longevity problems with the batteries running a 2P pack. What is the total capacity of that pack? If it's 4000 mah you'll be depleting it to it's max nearly every flight, not good for the packs. Also, current draw may be too high. Just seems a little too much on the edge. Also, I looked at the pics of your motor installation. Using a firewall and a solid front nose ring will greatly reduce the cooling to the motor. You may have overtemp problems. Keep a close eye on that. You can look at the beginning of this thred and see my mounting arrangement. It is shock mounted.

David,

I think you should clean and regrease the gearbox after 50-75 flights. I had an idler gear bearing go bad in the original gearbox after about 150 flights without cleaning, so I think 50-75 would be a better number. Other then that, the gearbox has been great. It really is a very well built unit. Just keep track of the orientation of the idler gears and the little washers when you disassemble the box. It needs to go back together correctly.

Hope this helps!