Flat depron wings

[dejampea]

Hi , can anyone help me in finding the Depron wing data that , I believe Nigel Hawes had in a magazine article. dealing with multilayer leading edges to flat wings , I think it was in relation to a cutlass design?

[Max Z]

Google Kline-Fogleman airfoils, plenty of examples around. Check this (German) site for examples.

[dejampea]

Thanks , Max , a nice site, the info I'm after is on a simple flat Leading edge , seem to remember a "K" factor .

[Stephen Jones]

Hi, do you mean the April 2015 RCM&E

here

With the cartoon Cutlass

And the KFm aerofoil here

Steve.

[dejampea]

Hi Steve, what an ace you are, that link goes much further than the one I was hunting, great stuff.

I kept my original copy somewhere safe," erm "too safe cos I have mislaid it., DP

[MattyB]

Posted by Stephen Jones on 09/11/2020 17:04:49:

Hi, do you mean the April 2015 RCM&E

here

With the cartoon Cutlass

And the KFm aerofoil here

KFm-4 is my favourite - it's got very benign handling and is easy to build as you can score and fold the top and bottom pieces around the LE, then glue it to the centre layer on both sides. Whichever one you choose I'd recommend armouring the LE with Duck tape or similar (or fit wooden LEs if not using the fold around method).