KR> wing design question

2009-11-25 Thread Ameet Savant
to delay a tip stall. Ameet Savant Omaha, NE - Original Message From: Fred Johnson To: KRnet Sent: Mon, November 23, 2009 1:31:52 PM Subject: RE: KR> wing design question Mark, I did mean same airfoil, just thinner profile out to the tip. Like say 18% at the root and 14% or thin

KR> wing design question

2009-11-23 Thread Fred Johnson
I am referring to two things, one is an article from Barnaby Wainfan in Kitplanes a few months back talked about it and the other are RV's. unless I am mistaken?? I know sailplanes will change the entire airfoil to a higher lifting airfoil at the tip from the root. Where the root will be fat up to

KR> wing design question

2009-11-23 Thread ttcse/Tom
  If I may... --- Fred: "(if) a barn door no taper wing doesn't require washout,"   Old Piper Hershey-bar wings I've looked at have washout.   Which ones are you referring to that don't 'need' washout? Washout is one strategy to helping the root stall befor

KR> wing design question

2009-11-23 Thread Fred Johnson
Mark, I did mean same airfoil, just thinner profile out to the tip. Like say 18% at the root and 14% or thinner at the tip. All the same chord. The drag at the root would be slightly higher but would the lift be slightly greater also because of the thickness? You are correct, the AS is as good a

KR> wing design question

2009-11-23 Thread Mark Langford
Fred Johnson wrote: > If a tapered wing requires washout to keep the tip from stalling first, > and > a barn door no taper wing doesn't require washout, what would a no taper > wing need if it just changes thickness from root to tip but not chord? Well apparently you're talking about a different

KR> wing design question

2009-11-23 Thread Fred Johnson
I have wing design question maybe someone on the group will know: If a tapered wing requires washout to keep the tip from stalling first, and a barn door no taper wing doesn't require washout, what would a no taper wing need if it just changes thickness from root to tip but not chord? Fred John