On Sat, 11 Jun 2005 00:04:10 -0400, vincent p. norris wrote:

Friend of mine said at lunch today that the upper wings of biplanes
have no dihedral. Hementioned specificlaly the Stearman PT-17.

Think he's right about the Stearman, but it's not universal. See:

http://www.miramarevents.com/dreamma...ane-300dpi.jpg

http://hillcrestcottage.com/images/m...bah/flying.jpg

http://www.geocities.co.jp/Playtown-...96/raf-be2.jpg

http://www.airwar.ru/image/i/other1/be2c-i.jpg

http://www.raf-upper-heyford.org/UH_...ol_Fighter.jpg

http://www.airmuseumsuk.org/airshow/...%20Fighter.jpg

http://www.airmuseumsuk.org/airshow/...with%20Pup.jpg

http://www.airmuseumsuk.org/airshow/...net%20Moth.jpg

http://www.aviation-history.com/raf/se5a-6.jpg

Not even triplanes are immune:

http://www.airmuseumsuk.org/airshow/...7/Triplane.jpg


Ron Wanttaja