I am in the process of converting a friend's .60 size glow model to gas, however the model which had a .75 size engine was flown with a 0/0 thrust line, no right or down thrust added. Now that I am installing a gas engine which will be turning a much larger dia prop should I include some right thrust in mounting the engine. The plane in question is a scratch built Stick type model.

Karol

probably a good idea but gassers are usuallt quite easy to deal with as they use stand offs so just get some thin fender washers fron napa or where ever and add untill you are comfy with the right thrust. I'm guessing you will need about 2 degrees. The added power may require some added down thrust too. Be ready to kill the engine on landing if yer having trouble getting her down... I had this problem with my extra 300s. downthrust was suppose to be 0 degrees but I had to add -1 degree. with it at 0, 1 click of power made her float forever!

Since it's easy enough to change later, I would stick to the original position and change it later if you feel the need to.

Think I'll do just that as I might be pleasantly surprised.

Karol