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Old Apr 02, 2003, 11:05 AM
Andy Thonet
Andy Thonet
Guest
n/a Posts
RE: [RCSE] Why does dive CG test work?

This diagram might help.

http://clubedsf.org/html/cg_dive_test.htm

Andy Thonet
KG6MGD
Club EDSF

-----Original Message-----
From: invicta421 [mailto:richardh@examen.com]
Sent: Wednesday, April 02, 2003 12:51 AM
To: soaring@airage.com
Subject: [RCSE] Why does dive CG test work?

I have been pondering this question for the last few weeks, but
haven't satified myself with an explaination yet. Most aerodynamics
seem to make intutive sense to me, but this doesn't.

The test I am speaking of is when you put the sailplane into a 45
degree dive and see if it pulls up, flys neutral or tucks under. A
page on how to do this can be found here:

http://www.polecataero.com/articles/cg_art.shtml

But this page doesn't explain why... to me it seems that a nose heavy
glider should tuck not rise when the CG is in front of the average
lift on the wing. Any help understanding this?

Thanks

-Richard

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