Rearward sweep is sometimes used for in a correction for W&B. I'm thinking the wooden Spencer Aircar Amphib. It was repowered w/ a bigger engine & has a 3200lbs gross wt nd a sweep was put in...
----- Original Message ----- From: "Hall, Rodney CTR NNSY, C210" <rodney.r.hall....@navy.mil> To: "KRnet" <kr...@mylist.net> Sent: Friday, July 16, 2010 8:26 AM Subject: RE: KR> forward sweep Forward sweep has been used on Amateur built aircraft before. The Cygnet has a touch of forward sweep as does the Schleicher K-8 glider. A small amount of forward sweep does not require sophisticated computer controls however deviating from the designers plans, especially with a proven design such as the KR-2 can be very, very dangerous. A seemingly insignificant amount of change in the wing geometry could cause unforeseen stability problems or cause the plane to become uncontrollable in certain situations. If you don't like the design your building build a different design don't make untested changes especially with control surfaces and wings. Rodney Hall -----Original Message----- From: krnet-bounces+rodney.r.hall.ctr=navy....@mylist.net [mailto:krnet-bounces+rodney.r.hall.ctr=navy....@mylist.net] On Behalf Of Hal Dantone Sent: Friday, July 16, 2010 9:35 To: KRnet Subject: Re: KR> forward sweep To Bill: Mooney's are not unstable, and their wings do not have forward sweep. They are great aircraft. Their leading edge is straight (perpendicular to the CL of the fuselage) and their trailing edge is swept forward which gives the appearance of forward sweep, but it is the leading edge that matters. Hal --- On Fri, 7/16/10, Tim <t...@telus.net> wrote: From: Tim <t...@telus.net> Subject: Re: KR> forward sweep To: "KRnet" <kr...@mylist.net> List-Post: krnet@list.krnet.org Date: Friday, July 16, 2010, 10:11 AM Back around 1988, Mike Sacoutis bought a wood wing Mooney off a Grass Airstrip. It had sat there 'outside' for years. After some maintenance, he talked 'Serge' German war Test Pilot, to fly it back to our Airport, approx 10 miles......Serge did, uneventfully.....Within a week a huge wind storm, lifted the Mooney up & thru it ontop of the Airport's 8' chain link fence. Both wings were snapped off, exposing inside the box spar, a friggin Mushroom farm. In places you could poke yer finger through the web.....Serge was upset with Mike> "That's the last GD time I'm ferrying your 'Junk' Deals".....Those moments in AV-U never forget ;-) CldLk-Tim ----- Original Message ----- From: <zorc...@aol.com> Then I guess every Mooney out there must be terribly unstable.... Bill Zorc Vero Beach, FL RV-8 N2046F In a message dated 7/12/2010 12:45:27 P.M. Eastern Daylight Time, aerona...@sbcglobal.net writes: On a more basic note, I will add two things about forward sweep. 1. Your wings must be much stronger to handle the forces caused by the negative stability. 2. It generally requires a computer controlled flight system to handle the bending moments. Not recommended. Hal Dantone _______________________________________ 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 _______________________________________ 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
