How to make droops?
 

I hope this is the right forum to post my question.

I want to make custom droops. I have seen vacuum formed droops but I don't have any experience with vacuum forming nor have I any equipment for that.

Is it possible to make some droops with balsa?

(I did a search but found nothing on the subject.)

RE: How to make droops?
 

OK, I'll bite,,, what's a Droop?

RE: How to make droops?
 

Vasek,

You could, if you cut the cover and extend the ribs in a 3% only at 40% of the semi-span.

Happy New Year!

RE: How to make droops?
 

I have a balsa covered foam wing so I need to fabricate just the extension.

Not sure how to go about it. A new lowered leading edge would be a start and some type of small "fill ribs" glued to the "old leading edge"? I would like to see some pics as an example it would help.

RE: How to make droops?
 

I see.

Is your wing symmetrical or cambered?
How much chord?

RE: How to make droops?
 

scale only 4 me,

Copied from http://www.geistware.com/rcmodeling/...s/toronto.htm:

"NASA droops" .............could be added to an existing wing. The NASA droop is a leading edge "anti-stall" modification, usually applied to the outer 35-40% of a wing. The easiest method to modify an existing plane to cure nasty stalling habits is the use of stall strips. Applied to the inner 20-25% of the wing, the stall strip is a small change to the leading edge that produces turbulence to that part of the wing at higher angles of attack, causing the stall to begin at the root. ......... Thus we will have a slightly higher stall speed, but the stall will at least be manageable. Plus - the beauty of the stall strips is that you can just pin them on and experiment till you get the effect you want, then make them permanent! So if you have a vicious stalling plane on your hands, don't just try to cope till you crash it - add some droops or stall strips - let the plane age gracefully, THEN crash it!

RE: How to make droops?
 

Thanks for the info, I found what I needed.

RE: How to make droops?
 

Great!

It is important to keep the radii of the leading edge the same, and also that the transition between airfoils is sharp as to create an air vortex.

Good luck with project and post pics, please.