Re: Three Classic Airgoils

[phil c]

That thread seems to be closed, but after reading it I found something interesting.  I pasted the 632A015 airfoil into a scan copy of the MAN Nobler plans.  The plans show an airfoil that looks like the 63 foil, but has the highpoint pushed forward, may to 20-25%.  From about 50% chord it has about 2% reverse curve to the flap hinge.

I built the Top Flight early kit years ago and remember it as having a flat section from about 50% chord to the flap hinge.  It was possible to build it flat on a board with some rib shimming.

So the whole discussion is a bit confusing.  Seems like for many pre-CAD plans the plans were more the draftsman's interpretation than an exact set of plans.  Could be why I switched to building more from patterns and dimensions than trying to build on plans.  Foam wings help.

Phil C

[Tim Wescott]

Is an airgoil anything like a gargoyle?

I've taken to building more with a tape measure than a plan, except for the parts with swoopy curves.