<div><font face="Times New Roman">harryangus

I have a PT-40 with an OS-40 that I built to teach my sons and grandchildren to fly.  It is built and balanced exactly (or as near as possible) to the plans and instructions.  Yes, the wing is set at a slightly positive incidence.  If you will look at the plans, you can also see it there.  Keep in mind that this is a trainer and as such it is designed to be very stable and to seek a return to straight and level flight from almost any attitude.

When flying, I have trimmed the airplane to level flight at half throttle.  When I advance the throttle from half, the plane will climb.  When I retard the throttle from half, the plane will descend.  When my grandchildren are flying, this seems to be a very useful trait in that it helps them restore the plane to straight and level and also kind of instills in them the thought that altitude is controlled with throttle and that airspeed is controlled with elevator.</font></div><div><font face="Times New Roman"></font> </div><div><font face="Times New Roman">I have also discovered that the PT-40 on the Great Planes R/C simulator, Real Flight, seems to fly exactly like my model.  This, too, has help the grandkids to be able to successfully learn to fly.</font></div><div><font face="Times New Roman"></font> </div><div><font face="Times New Roman">Blue Skies</font></div><div><font face="Times New Roman">Charles</font></div>