KR> gear location
Sid,, The reason that I gave a measurment from the rear face of the main spar is because not everyone's or even maybe no one's leading edge is in the same place. There are several different airfoils around and different hands building them. But the gear axle relative to the main spar would always be a station that is the same that anyone can check from. I am concerned and understand what the problem is and I would not think that a 1/4" or 1/2" move would have any serious impact on W but a 3" move of the gear center line is very significant. Joe horton -- Forwarded Message -- From: Sid Wood via KRnet krnet at list.krnet.org Now, it's on to fixing the main gear wheel location; needs to be moved 3 inches further aft on my KR-2. Both KR and Diehl plans are silent on this main wheel location dimension. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA 4 Fish to Never Eat Click to Learn 4 Fish to NEVER Eat avoid these like the plague! http://thirdpartyoffers.juno.com/TGL3141/53ee1417992a214174687st02duc
KR> Gear location
My purpose in moving the main wheels 3 inches aft to 20 inches from the leading edge of the stub wing is to improve ground handling. The plan is to not dump on the tail when boarding or dismounting. Plus I can keep the nose wheel on the pavement on the bumpy taxiways at 2W6. Moving the main wheel 3 inches aft will move the cg about 0.2 inches aft; that should not make much difference in flight stability. The ground cg when I board or dismount does move to about 17 inches; that's why I need the wheels to be at 20 inches. Elevator authority at slow speed prior to take-off does not appear to be an issue. First high speed taxi will prove or disprove that theory. And of course I will do another weight and balance with my digital scales prior to any attempted flight. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA > > Sid has his main axle distance 17" aft of the stub wing leading edge, Joe > has his 7" aft of the forward face of the main spar. Since the leading > edge > of the stub wing should 10.75" forward of the forward edge of the main > spar > they are essentially in the same position for a tri -gear. It seems to me > the difference is other loading aft of the gear. According to Sid's w he > is right in the middle of the range. I assume Joe's is the same since he > flies in balance. Going to the folks that like physics, something doesn't > compute. Moving the wheels aft would fix the ground imbalance but would > move the C.G. a little aft. > My thoughts, Larry Bell > > > >> I've built my own gear and I measure out at 18"s back from the leading >> edge to the axle center for the mains. 10"s from fire wall forward to >> axle >> center. >> >> Dan Prichard >> Portland Oregon
