View Single Post
Old Jun 08, 2012, 10:32 AM
epoxyearl is offline
Find More Posts by epoxyearl
Registered User
epoxyearl's Avatar
United States, MD, Elkton
Joined Oct 2011
11,004 Posts
As with most things,a generalisation will do.If folks would say"around 2deg. down and 2 deg.right thrust",the pressure would be removed from a relatively simple matter.
Logic tells us that a high wing airplane has a high drag concentration above the thrust line.This the effect of "dragging" the nose up.So we start at about two degrees down thrust,which theoretically,should help counteract the drag.
To test that,fly full throttle,level flight,trimmed ,and close the throttle quickly.Properly adjusted the airplane will continue for a distance,neither climbing,or immediately diving.Educate your self,after the test,add two washers at the place which will add more downthrust,and do it again. I.m betting you won't see a marked difference......a little but not something that'll crash your airplane.-For those of us to whom it's important,that's important...to those who won't try it,, your airplane will still fly well.

Right thrust is another ball game.The way most aircraft are designed,when the engine develops horse power,the airplane wants to turn left.So add right rudder.or if you add right thrust,it's like power steering..the harder the engine works,the more the left turn is cancelled,be cause the engine is now pulling to the right.
So the model test is to trim straight and level,carefully go into a vertical climb,and see which way the line goes,all this at full throttle.If it goes in a straight line,you're good,unless you had right rudder trim originally....then you'll have to back that off since it won't be needed,then readjust the right thrust to compensate.See how you have to chase things around?most guys don't bother!
epoxyearl is offline Find More Posts by epoxyearl
RCG Plus Member
Latest blog entry: Airshows, and Tradition.
Reply With Quote