Original Posted By: "Gary Boothe"
I was reading an Aeronca Champ POH and find that the center of gravity range is 18.0% M.A.C. most forward and 36.O%M.A.C. most rearward. I've read the list that the limits for the FC10 Pietenpol airfoil are 25-33% MAC. A 33% aft limit seems fairly standard. What's special about the Champ's airfoil that it allows such a wide range?________________________________This e-mail message (including any attachments) is for the sole use ofthe intended recipient(s) and may contain confidential and privilegedinformation. If the reader of this message is not the intendedrecipient, you are hereby notified that any dissemination, distributionor copying of this message (including any attachments) is strictlyprohibited.If you have received this message in error, please contactthe sender by reply e-mail message and destroy all copies of theoriginal message (including attachments).________________________________________________________________________________
Pietenpol-List: 33% or 36% MAC?
RE: Pietenpol-List: 33% or 36% MAC?
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Jeff,As I understand, the Champ and the Chief both had 4412 airfoils. The Champwas originally designed to fly on 50 hp, needing a hi-lift airfoil to helpit get off the ground. Cessna 120's and 140's never had less than 85 hp, andused the 2412 airfoil.less camber.Gary BootheNX308MB
Jeff,As I understand, the Champ and the Chief both had 4412 airfoils. The Champwas originally designed to fly on 50 hp, needing a hi-lift airfoil to helpit get off the ground. Cessna 120's and 140's never had less than 85 hp, andused the 2412 airfoil.less camber.Gary BootheNX308MB