For what it's worth, holding the coefficient of lift constant, a shorter chord means a lower Reynolds number which if you check the drag plots for an airfoil means a higher coefficient of drag.
Formula for Reynolds Number: Reynolds = Density * Speed * Chord / Viscosity [see: http://www.dreesecode.com/primer/airfoil4.html] A short span and a short chord is sort of the worst of both worlds for induced and parasite drag respectively. If someone has references that say I'm wrong, I would be glad to have egg on my face and correct myself. I'm in this to learn. -mdg On Mon, Dec 19, 2011 at 12:55 PM, Hal Dantone <aerona...@sbcglobal.net> wrote: > You meant "short span and long chord." > > --- On Mon, 12/19/11, Mark Goldman <bitshif...@gmail.com> wrote: > > From: Mark Goldman <bitshif...@gmail.com> > Subject: RE: KR> A=L*W > To: "KRnet" <kr...@mylist.net> > Date: Monday, December 19, 2011, 1:47 PM > > On Dec 15, 2011 5:14 PM, "Barrett" <barret...@comcast.net> wrote: > <snip> >> Just thinking. A P-51 look-a-like would HAVE to have the radiator cooling >> duct under the fuse. So, what if that was turned into a pass-thru and the >> bottom was wing shaped for a bit of extra lift? (i.e.- flying fuselage) > > I don't have my books on me right now, but everything I have read suggests > that short span and short chord lifting surfaces will end up costing more > in drag than they contribute in lift. Aside from flying wing designs, I > don't believe there are any modern lifting body designs. I can try to dig > up a reference tonight if you're interested. > > -mdg > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html -- Our problems are mostly behind us, now all we have to do is fight the solutions.
