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IAFS_Painter
03-25-2004, 07:03 AM
A lot of Soviet fighters had short wing chord at the tips - why?

AFIK, they didn't employ washout - so the tips would stall early. And then they put slats on the La 7 (LaGG 3's too?) - which would be an anti stall measure.

The only reason I can come up with is to allow - or even encourage - snap rolls.

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IAFS_Painter
03-25-2004, 07:03 AM
A lot of Soviet fighters had short wing chord at the tips - why?

AFIK, they didn't employ washout - so the tips would stall early. And then they put slats on the La 7 (LaGG 3's too?) - which would be an anti stall measure.

The only reason I can come up with is to allow - or even encourage - snap rolls.

http://www.robert-stuart.me.uk/il2/signature/paint_sig_003.jpg
il2airracing.com (http://www.il2airracing.com) Painter's Pages (http://www.robert-stuart.me.uk/il2)
I've given up correcting my own spelling
Unless I've corrected it here

SeaFireLIV
03-25-2004, 07:06 AM
Ok, here I reveal my lack of knowledge. What`s a short wing chord?

ELEM
03-25-2004, 07:40 AM
The chord of a wing is the dimension from the leading edge to the trailing edge. It's normal to talk about the "mean wing chord" ie.the average, when comparing wing layout. The soviet a/c at that time did have quite similar wing layouts, broad chord at the roots and tapering quite sharply to a narrow chord at the tip. This is "Low aspect ratio". Aspect ratio is the relationship between the span and the chord of a wing. LAR would tend to give greater lift and manouverability at low altitude. "High aspect ratio" ie. gliders and Ta-152 would be more effective at high altitude. There are structural reasons to be considered too in that a broad root chord can make the wing stronger, easier to produce and able to take more stress.

I wouldn't join any club that would have ME as member!

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SeaFireLIV
03-25-2004, 08:37 AM
Thanks for that, ELEM. Once again, this forum shows its good points.

p1ngu666
03-25-2004, 09:34 AM
also theres fuel tanks in the wings, and other stuff too radiators etc

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dahdah
03-25-2004, 10:36 AM
ELEM, not necessarily true. That human powered a/c had high aspect wings and barely got above 10m, if that(iirc).

What was the airfoil thickness % at the tip? The higher the % the better the lift, usually.