Original Posted By: Tim Willis
Hi TimHey, at least our math is the same!!! Can't say the same for my memory. I couldhave saved the aggravation by walking out to the garage but noooooooooo, ithad to be from dim memory. At least someone is reading.I agree that we need to start from known benchmarks and 1 inch/2 degrees soundslike it would work.DaveRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 1 Mar 2010 19:14:25 -0600 (GMT-06:00)
Pietenpol-List: Re: Riblett 612 and angle of incidence--No, no, TWO DEGREES!!!
Pietenpol-List: Re: Riblett 612 and angle of incidence--No, no, TWO DEGREES!!!
Original Posted By: "Pieti Lowell"
Dan.I tried to build the 612 the same as the FC 10 per the drawings. 90 deg. with aspacer T88ed to the top of the spar to rib. Harold R. suggested I use a 1 degangle of incidence for best performance. I would just make the change in thecabane height. to achieve the 1 Deg. Keep in mind that my wings are clipped 2Ft, much like a clipped wing 4412 on an earlier Piet that performed great butmuch faster on landing speed. I am sure you will be satisfied with the glide usingthe 612, approaches the J3.Pieti LowellI watched the videos Jeff B. put on Youtube of your talk at Brodhead last year. You mentioned that you kept your AoI of 2 degrees from the FC-10 and that you'd probably like to see it at 1 degree or less because at flat out cruise you've got to apply a significant (30-40lbs) amount of forward pressure on the stick.The question I have is this: did you build the angle of incidence into the spar orientation in the ribs or did you keep the spars at a 90 degree angle to the wing chord?Also, looking at the Riblett 612, I see that if you keep the front spar the same distance from the leading edge as the FC1-1, 6 inches, that dictates that the front spar and the rear spar will not be aligned, vertically - the front spar must be shifted down an inch or so to fit in the rib with respect to the aft spar. How did you address this? Did you even worry about it?Thanks,Dan-- Dan YocumFermilab 630.840.6509yocum@fnal.gov, http://fermigrid.fnal.gov"I fly because it releases my mind from the tyranny of petty things."[/quote]Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Riblett 612 and angle of incidence--No, no, TWO DEGREES!!!
Dan.I tried to build the 612 the same as the FC 10 per the drawings. 90 deg. with aspacer T88ed to the top of the spar to rib. Harold R. suggested I use a 1 degangle of incidence for best performance. I would just make the change in thecabane height. to achieve the 1 Deg. Keep in mind that my wings are clipped 2Ft, much like a clipped wing 4412 on an earlier Piet that performed great butmuch faster on landing speed. I am sure you will be satisfied with the glide usingthe 612, approaches the J3.Pieti LowellI watched the videos Jeff B. put on Youtube of your talk at Brodhead last year. You mentioned that you kept your AoI of 2 degrees from the FC-10 and that you'd probably like to see it at 1 degree or less because at flat out cruise you've got to apply a significant (30-40lbs) amount of forward pressure on the stick.The question I have is this: did you build the angle of incidence into the spar orientation in the ribs or did you keep the spars at a 90 degree angle to the wing chord?Also, looking at the Riblett 612, I see that if you keep the front spar the same distance from the leading edge as the FC1-1, 6 inches, that dictates that the front spar and the rear spar will not be aligned, vertically - the front spar must be shifted down an inch or so to fit in the rib with respect to the aft spar. How did you address this? Did you even worry about it?Thanks,Dan-- Dan YocumFermilab 630.840.6509yocum@fnal.gov, http://fermigrid.fnal.gov"I fly because it releases my mind from the tyranny of petty things."[/quote]Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Riblett 612 and angle of incidence--No, no, TWO DEGREES!!!
Original Posted By: "Douwe Blumberg"
Tim The 1 inch is correct but if you go 612 use 1/2 inch to get 1 Deg.Pieti Lowell My prints show 2 degrees. They also show a 1" length difference betweenthe front and back cabanes.[/quote] > Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Tim The 1 inch is correct but if you go 612 use 1/2 inch to get 1 Deg.Pieti Lowell My prints show 2 degrees. They also show a 1" length difference betweenthe front and back cabanes.[/quote] > Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
> Pietenpol-List: Re: Riblett 612 and angle of incidence--No, no, TWO DEGREES!!!
Original Posted By: Jeff Boatright