KR> KR2S Wing sweep question.
Sorry, I forgot the straight piece (planing on a wing with straight taper ...) The correct data is quite similar: The KR2S theoretical wing: wing area of 84 Sq. Ft. WingSpan 23.00 FT. Aspect Ratio 6.3 Taper ratio 0.75 QC Sweep 0.00 Deg. Mean Chord 3.68 Ft. MC Span Location 5.48 Ft. Gunnar On 12.07.2010 15:53, Gunnar Olsen wrote: > For a straight wing tapering from 48 to 36 inches; when quarter chord > sweep is straight, the leading edge of the tip spar is 3 inches behind > the leading edge of the root spar. > > It does not matter where the actual wing spar is located and what angle > it has. ( but I believe on the KR it should be straight as well) > > The KR2S theoretical wing: > > wing area of 80.5 Sq. Ft. > WingSpan 23.00 FT. > Aspect Ratio 6.75 > Taper ratio 0.75 > QC Sweep 0.00 Deg. > Mean Chord 3.51 Ft. > MC Span Location 5.48 Ft. > > > Gunnar > > On 12.07.2010 14:46, Larry Flesner wrote: > >> At 05:34 AM 7/12/2010, you wrote: >> >> >>> I was working with the CAD drawings I've done in Rhino for the KR2S and >>> I noticed that the outer wing according to plans has a minute amount of >>> forward sweep. >>> Pete. >>> Ballina, Aus. >>> >>> >> + >> >> I think I'd check the software if I were you. The forward spar is >> perfectly straight from tip to tip. The wing tappers from the 48 >> inch rib to the 36 inch rib at the tip. I'd have to look at the >> airplane to be sure but I think my plans built wings tapper slightly >> aft from the attach point to the tip or at most, straight. >> >> Larry Flesner >> >> >> >> >> ___ >> 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 > > > >
KR> KR2S Wing sweep question.
For a straight wing tapering from 48 to 36 inches; when quarter chord sweep is straight, the leading edge of the tip spar is 3 inches behind the leading edge of the root spar. It does not matter where the actual wing spar is located and what angle it has. ( but I believe on the KR it should be straight as well) The KR2S theoretical wing: wing area of 80.5 Sq. Ft. WingSpan 23.00 FT. Aspect Ratio 6.75 Taper ratio 0.75 QC Sweep 0.00 Deg. Mean Chord 3.51 Ft. MC Span Location 5.48 Ft. Gunnar On 12.07.2010 14:46, Larry Flesner wrote: > At 05:34 AM 7/12/2010, you wrote: > >> I was working with the CAD drawings I've done in Rhino for the KR2S and >> I noticed that the outer wing according to plans has a minute amount of >> forward sweep. >> Pete. >> Ballina, Aus. >> > + > > I think I'd check the software if I were you. The forward spar is > perfectly straight from tip to tip. The wing tappers from the 48 > inch rib to the 36 inch rib at the tip. I'd have to look at the > airplane to be sure but I think my plans built wings tapper slightly > aft from the attach point to the tip or at most, straight. > > Larry Flesner > > > > > ___ > 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 > > > >
KR> KR2S Wing sweep question.
I was surprised when I saw it, as I'd always assumed that there was no sweep at all. As it turns out it's next to nothing but the spar is indeed straight, but the sweep at 25% chord is just a tad under 1° forward. When you look at the wing, the trailing edge tapers forward more than the leading edge tapers back. The aspect ratio for the outer wings is 6.4 and the wing taper ratio is 5.3. The main spar while straight does not travel equidistant along the chord line. Check out this link. http://s12.photobucket.com/albums/a217/sarahjeanb/Peters/?action=view=MAC1.jpg The spar is in green, the 25% chord line used to measure sweep in highlighted in yellow. The red line just to the front of the yellow line near the centreline of the aircraft denoted the station of the MAC from the firewall. Cheers. Pete. Larry Flesner wrote: > > > > I think I'd check the software if I were you. The forward spar is > perfectly straight from tip to tip. The wing tappers from the 48 > inch rib to the 36 inch rib at the tip. I'd have to look at the > airplane to be sure but I think my plans built wings tapper slightly > aft from the attach point to the tip or at most, straight. > > Larry Flesner
KR> KR2S Wing sweep question.
At 05:34 AM 7/12/2010, you wrote: >I was working with the CAD drawings I've done in Rhino for the KR2S and >I noticed that the outer wing according to plans has a minute amount of >forward sweep. >Pete. >Ballina, Aus. + I think I'd check the software if I were you. The forward spar is perfectly straight from tip to tip. The wing tappers from the 48 inch rib to the 36 inch rib at the tip. I'd have to look at the airplane to be sure but I think my plans built wings tapper slightly aft from the attach point to the tip or at most, straight. Larry Flesner
KR> KR2S Wing sweep question.
I was working with the CAD drawings I've done in Rhino for the KR2S and I noticed that the outer wing according to plans has a minute amount of forward sweep. I wonder if this has anything to do with the very sensitive aft CG issues the plane experiences? Can anyone else confirm or debunk this discovery? Cheers. Pete. Ballina, Aus.
