You know that sometimes tire pressure will affect nose wheel shimmy. I hadn't seen that listed anywhere in reference to the shimmy issue.
Newbee KR project owner . . . L. D. Mueller 521 North Madison Street Cuba City, WI 53807 608-744-3333 ----- Original Message ----- From: <jeffyor...@qx.net> To: "KRnet" <kr...@mylist.net> Sent: Monday, September 19, 2005 9:58 AM Subject: Re: KR> Nose Gear question > Yes, It is the Diehl. Yes there is a gap space between the on each side of > the bolt between it and the spring. NOt sure how the bolt would have > gotten > bent. the bend is ever so slight. May be moot to the subject. > I am sure I was not doing 75 when I pulled off and not as high as 85 when > I > touched back down so it helps to hear that you have been able to do so > without this issue. By the way, this is the first time my plane has done > this. > I also appreciate the info on your take off on your methods. This is why I > was hoping to catch a ride with someone at the gathering. Wanted to get > more > info and feel from those flying, espesially with the same configuration as > mine. > I think I need to look closely at the nose gear back at the fire wall > engine > mount side. > > Anybody out there near Georgetown/ Lexington KY > > Jeff York > KR-2 Flying > N839BG > Home page http//:web.qx.net/jeffyork40/ > My KR-2 http://web.qx.net/jeffyork40/Airplane/ to see my KR-2 > Email jeffyor...@qx.net > > ----- Original Message ----- > From: "Mark Jones" <mjo...@muellersales.com> > To: "KRnet" <kr...@mylist.net> > Sent: Monday, September 19, 2005 9:57 AM > Subject: RE: KR> Nose Gear question > > >> Jeff, >> It sounds as if you are referring to the Diehl nose gear which is what I > have. I have never had an issue with shimmy on mine. I have rotated at > speeds as high as 75 mph and landed as high as 85 mph all with no shimmy. > The spring on mine does not contact the centering bolt when the gear is > lined up straight. There is (guessing) a 1/8" space on each side of the > bolt > between it and the spring. This allows for some free castering before > contact with the spring. The purpose of the spring is to help align the > nose > wheel for landing. You mentioned the centering bolt being bent and I think > you had to do that prior to your shimmy. With the stops on the nose gear, > I > just don't see how it could bend while taxiing. I can turn my plane either > direction to it's limits and it will not bend the bolt. When you begin > your > take off roll, apply enough up elevator to relieve most of the weight off > the nose wheel without taking it off the pavement. Once you establish > enough > speed to control the plane with rudder, gently raise the nose off the > pavement and wait for the plane to fly itself off the runway. Upon landing > and after the mains touch down, keep the nose up as long as possible until > it settles on it's on onto the runway and continue to apply up elevator as > you slow down. One thing to note is that with the nose gear, the plane > will > stay on the runway and not float in ground effect once the mains touch > down. > It will bounce on a hard landing as will any airplane. >> >> Mark Jones (N886MJ) >> Wales, WI >> Visit my web site: http://mywebpage.netscape.com/n886mj >> Email: flyk...@wi.rr.com >> >> >> -----Original Message----- >> From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On >> Behalf Of jeffyor...@qx.net >> Sent: Monday, September 19, 2005 8:31 AM >> To: KRnet >> Subject: KR> Nose Gear question >> >> >> OK, So I may not supply quite enough info for a complete evaluation but, >> I > am going to try and get your alls advise. >> >> Yesterday when I went to rotate to take off, just at or before the nose > gear lifted, I felt a pretty significant shimmy in the nose gear. The nose > came up and the airplane lifted off. I decided to pull the power and set > back down. I pulled the power, let the plane sit back down and upon the > nose > gear touch down, the shimmy came back but much worse. I was actually > wondering if it was the nose wheel or something significantly out of > balance > with the engine. >> I never really looked at the air speed indicator but I looked at the tach > and noticed that I still had 2200 RPM and was having a difficult time > getting the RPM's to come down. I have the vernier ( screw in and out ) > type > throttle so I began back screwing the throttle. Everything finally slowed > down and I taxied off and back to my hanger. >> >> Upon inspection of the nose wheel it appears that the bolt that appears >> to > hold the little coil spring posts centered, has bent. Or maybe it was bent > before I started. I also want to point out that the free castering nose > wheel self centers when you lift up on the front end, a test I was told > indicates that you have the right tension and such on the nose wheel. In > testing a couple of them at the gathering, I noticed they did not self > center and those owners indicated they had no shimmy issues. By the way > that > information was not meant as any criticism of anyone else's KR. I just > wanted to compare my nose gear adjustment to others while there. >> >> Here is my question. Did I let the nose gear touch down with to much >> speed > thus precipitating the shimmy? Did I do a poor preflight and this > centering > bolt was already bent ( Slightly, spring still looks to still be > contained ) > ? >> >> Is it possible that I let the plane stay planted to long and had to mush > speed before I pulled the nose wheel come up? Thus precipitated the whole > thing. Maybe I need to look at the nose gear at the point of the engine > mount / fire wall? >> >> Your thoughts experiences? >> >> Jeff York >> KR-2 Flying >> N839BG >> Home page http//:web.qx.net/jeffyork40/ >> My KR-2 http://web.qx.net/jeffyork40/Airplane/ to see my KR-2 >> Email jeffyor...@qx.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 >> > > > > _______________________________________ > 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 > >
