I have flown a few different pitcheron planes, and also crashed almost as many, so I am somewhat qualified to ramble on this subject.
Most of the successful pitcheron airplanes use airfoils with very low pitching moment. What this means is that they tend to be more on the semisymetrical side rather than really cambered. (like the Hobie) when you change the angle of attack up and down like you will on a pitcheron flight, there is a lot of extra drag that comes from these changes. This is where ppitcherons get the reputation of stalling really bad at slow speeds and high AOA. I have never flown a pitcheron with polyhedral, but I have seen the pix of the Elf. I would be curious how much extra yaw gets introduced when you twist 'em up. If it were MY hobie hawk, I would resist the urge to modify it, and keep it more or less stock, just my opinion. There are much better pitcherons already out there that you could get now. Buuuuut, I also understand the "can't leave well enough alone" syndrome. We do what we feel like. Good luck Winchdoc > A dude named Harris Nelson can be contacted through > http://www.northcountyflyingmachines.com > He made a ship called the Elf that was a pitcheron polyhedral. Take a > look at > http://www.northcountyflyingmachines.com/history.htm > down at the bottom for his composite ships. I'm developing an unhealthy > fascination with his Shrike. > > -J > > On Thu, 23 May 2002, Brian Joder - OUTBOUND Ind. wrote: > > >Hello all, > > > >Question for you aerodynamic geniuses out there: > > > >What problems would I face if I converted a > >rudder/elevator ship to a rudder/elevator/wingeron > >ship - with a wing that has dihedral? > > > >In my scenario, lets assume the wingeron/pitcheron > >hardware that rotates the wings works perfectly - no > >binding, no slop. > > > >The real question I have is the wing I want to use has > >built in dihedral starting about 1/3 of the way out - > >will this dihedral cause handling problems, or is the > >airfoil more critical? > > > >Why go to this trouble you ask? Because it's > >interesting!??... and this wing will not accept > >ailerons! > > > >Any takers on this one? > > > >(OK - it's a Hobie Hawk I'm talking about - there, I > >said it!) > > > >B-man > >http://www.hobiehawkinfo.com > > > >__________________________________________________ > >Do You Yahoo!? > >LAUNCH - Your Yahoo! Music Experience > >http://launch.yahoo.com > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" and > "unsubscribe" requests to [EMAIL PROTECTED] > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and > "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
