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Path: utzoo!watmath!clyde!burl!ulysses!allegra!resonex!tggsu
From: tggsu@resonex.UUCP (Tom Gulvin Root)
Newsgroups: net.aviation
Subject: Re: B-70
Message-ID: <165@resonex.UUCP>
Date: Wed, 12-Sep-84 12:38:09 EDT
Article-I.D.: resonex.165
Posted: Wed Sep 12 12:38:09 1984
Date-Received: Fri, 14-Sep-84 21:11:48 EDT
References: <3116@rabbit.UUCP>, <2136@hplabsc.UUCP>
Organization: Resonex Inc., Sunnyvale, CA
Lines: 13

Some people caught on that the XB-70 had drooping wing tips so as to
catch the compression shock wave for added lift. While this is partially true,
the main reason is that the center of lift moves back along a wing at
supersonic speeds due to the compression wave along the wing leading edges.

There are several methods of countering this tendancy - the B-58 and
Concorde (and to some extent the B-1) move fuel around to modify the
center of gravity so that it agrees with the center of lift. Times were
simpler back then (?!?) and they mearly changed the effective wing area
of the rear of the aircraft by rotating the wing tips away from the lift
producing horizontal. BTW, it was made out of a stainless-steel/fiberglass
honeycomb, not titanium.
	Tom Gulvin - Resonex, Inc. - Sunnyvale CA.