I think what Mark L is saying is that if your rear spar is already set for the 1 degree there is no real advantage to raising it to 2 degree...
Bob Glidden Eminence,Indiana KR2S N181FW (building) Corvair 110 glid...@ccrtc.com ----- Original Message ----- From: "michaela" <micha...@tonypickering.com> To: "KRnet" <kr...@mylist.net> Sent: Thursday, February 02, 2006 7:36 PM Subject: Re: KR> angle of incidence, AS504x Mark et al.: I'd like to follow up on your last comment with a question/clarification. I've read your thoughts on AOI etc. I believe the project (boat with main spars in place) I just purchased was built to original KR2 plans, so I assume it is using 3.5degre AOI for wings?. I intend on going with the AS504x. I've been thinking I will have to find a way to raise the rear spar to get close to 1-2degree AOI. Are you suggesting its probably not worth the effort if my main concern is cruise AOA at altitude of 5-10K. I'm also leaning toward lengthening the H.S. and increasing area of rudder. Project appears past point where lengthening the fuse seems reasonable, so I am probably stuck with it as is. But I'd like to make whatever other tweaks I can to improve stability. Of course, I'll play close attention to keeping COG in range... Anyone's thoughts welcome. Thanks. Tony > -------Original Message------- > From: Mark Langford <n5...@hiwaay.net> > Subject: Re: KR> angle of incidence, AS504x > Sent: 03 Feb '06 01:29 > > Russ Bell wrote: > > > What is current thought on AOI for the AS504x > > airfoils? Looks like initial calculations were 1 > > degree. Has that been found to be optimal? > > All that have been built to data have been 1 degree and nobody's > complained > yet. My fuselage is right at zero degrees at low altitude wide open with > one degree. The question might be "how often do we fly at low altitude > wide > open", and my answer would be almost never. For that reason, I don't see > a > problem with 2 degree eithers, which would give you a slightly better > view > over the cowling, if nothing else, with little if any drag penalty, > unless > you spend all of your time doing high speed passes at sea level. On the > other hand, if your aft spar is already glued in place, you can leave it > there and it becomes a no-brainer... > > Mark Langford, Harvest, AL > see homebuilt airplane at http://www.N56ML.com > email to N56ML "at" hiwaay.net > > > _______________________________________ > 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
