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Old Nov 05, 2012, 05:12 AM
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Yak 52's Avatar
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N71 Airfoil?

I'm looking for the N71 airfoil for a scale project but can't find it anywhere. I found it in an old NASA technical report but I've lost the link. Please can anyone help?

Thanks!
Jon
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Old Nov 05, 2012, 12:43 PM
An itch?. Scratch build.
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It might be easier to find the airfoil data by searching on the aircraft itself, what aircraft. ?
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Old Nov 05, 2012, 01:02 PM
An itch?. Scratch build.
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Is it the Avro Baby ?

I found this if it helps - http://www.eaa.org/bitsandpieces/art...11-02_baby.asp

The section towards the bottom mentions a Baby built from original drawings at 1:1, he used the RAF 15 airfoil, (though that may not be exactly original, it could depend on just how scale you want).
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Old Nov 05, 2012, 02:12 PM
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It's the Plumb BGP-1, a one off biplane. I am doing a Baby too so thanks for the link!
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Old Nov 06, 2012, 05:30 PM
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According to this page http://www.ae.illinois.edu/m-selig/ads/aircraft.html the same wing section was used on the "Republic EP-1 Model 100". According to this other page http://www.avrosys.nu/aircraft/jakt/109J9.htm the Republic EP-1 was an export version (EP = Export Pursuit) of the Seversky Republic P35 (also confirmed on http://en.wikipedia.org/wiki/Seversky_P-35 ). I am not sure about the specific model 100, but I doubt that the wing section would have been much different between versions. On the page I linked first the wing section for both the Seversky P-35 and Seversky EP-1 is given as Seversky S-3, which might be a bit easier to track down. It's the same wing section as the P-47 Thunderbolt and several other Seversky fighters, all derived from the Seversky S-3 Racer wing section.
[edit] there's a picture of the section in this thread, along with a close naca one: http://www.rcgroups.com/forums/showt...1118939&page=4
[edit 2] I am not sure how recent is this page, but it offers you a form to contact Barry Plumb, the designer and owner of the plane you are trying to reproduce: http://www.steenaero.com/biplane_lore.cfm
[edit 3] Or you could try to contact him through the Light Aircraft Association http://www.lightaircraftassociation....arryPlumb.html , where he serves as Director and Chairman of LAA's Engineering Committee. My guess is that sending an email to the address engineering@laa.uk.com (from http://www.lightaircraftassociation....ontactLAA.html) is likely to come to his attention.
[edit 4] or via his email address at the Manchester Metropolitan University b.plumb@mmu.ac.uk , where he is Professor Emeritus ( I imagine in Electrical Engineering) and according to this page he is currently chairman of the Military Education Committee (MEC) http://www.mmu.ac.uk/mec/
[edit 5] or through the The University of Manchester Staff Golfing Society ... nah, this is getting so easy it's no fun anymore
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Old Nov 07, 2012, 04:34 AM
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Thanks Brandano. Barry has sent me the drawings for the aircraft already I was just looking for a small scaleable drawing. The idea was to plot a slightly thinner version as the model is only peanut sized. That one you linked to looks right, thanks.
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