Pylon racer dihedral

[coosbaylumber]

Pylon racer dihedral

I am trying to build a pylon racer off one sheet of two for a very old pylon racer. I got the big money sheet, but seem the notes are on the other sheet which happens to be missing. The aircraft was built in about 1962, and AMA knows about it, and has near zero information on it. There is zero information on the surviving sheet as to what was the original dihedral angle. The aircraft has about 575 S.I. on a 50 inch wingspan. Is powered by a .15 glow engine. It has strip ailerons, fixed gear, big fin but small rudder, and very sleek looking.


What dihedral angle or amount was popular back then and what should it be today?

And remember, this one has to turn very sharp and "Right-now".



Wm.

[JetPlaneFlyer]

If it has ailerons and you want a snappy responce with no inherant lateral stability then I'd suggest build the wing flat, or at least build it flat on the upper surface so that any taper in thickness gives a notional amount of dihedral.

[Sparky Paul]

Going waaaaaaay back when..
one of my .15 powered pylon racers, circa 1964..
Super Tigre G15 motor.
A note on the drawing for the 1st version says 1/2" dihedral.

[coosbaylumber]

I think you BOTH may be correct. The A/C of the era for aerobatic purposes had a big dihedral of about 4-6 degrees, each side. Was hoping against hope that the model A/C of that era for pylon did not also.

Wm.