Archive of the Yahoo! Groups mailing list for the Bug hand-launch glider 2002-2018

From: Tim Schuh <tim@...>
Date: Saturday, April 17, 2010 12:54 AM
Subject: Re: [BugHLG] Dihedral or polyhedral
On 4/16/2010 5:27 PM, Paul LaChance wrote: > Hi all, > > Just wondering if there is major performance difference between a dlg or sal glider with dihedral vs polyhedral. I understand dihedral always gives more wing area for lift but are there major differences? > > Paul > Polyhedral is generally desired for rudder/elevator ships though it is more time consuming to build and can be tricky on small wings like HLGs. This would especially be true on the Bug where you're dealing with compound curves in the leading edge and camber of the wing. Two break (flat center section) seems to be a good compromise giving good rudder response and stability without making the wing terribly complex to build.