You can order reprints of Blaine Rawdon's excellent "Dihedral" series of articles from Model Aviation Magazine. The reprints cost $4.00 per article (there are four articles in this series - Model Aviation August through November 1988 issues). The following web link will provide you with a form for ordering reprints.
http://www.modelaircraft.org/mag/Magreprint.htm (I would be happy to scan the article and make it available on the web if approval from Blaine Rawdon and Model Aviation could be obtained. For now it is fastest to order the reprints from Model Aviation Magazine.) RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]