It is a bit hard to quantify. I have always done it by feel. We will have the tank out in a few weeks...maybe there is some way of measuring the tightness. Basically you wind up the turnbuckle until the spring starts to stretch. With a bit of finger only pressure I am guessing the springs would move sideways about a centimetre if the tightness is correct. The wheel should be firm with no slop Rob
Rob Thompson 0429 493 828 On Mon, Sep 21, 2020 at 8:04 PM Győző Horváth <[email protected]> wrote: > Hi Rob, > > Is it possible to quantify somehow the tightness of the turnbuckles? > Just making the experiments is problematic because of the need of taking > out the fuel tank.☺️ It would be good some objective measurement. > > BR > Gyozo > > > Az iPhone-omról küldve > > 2020. szept. 21. dátummal, 10:09 időpontban Rob Thompson < > [email protected]> írta: > > > If there is not much movement in the bearings, my suspicion is that the > tail wheel spring turnbuckles are not tight enough. > If the tailwheel spring turnbuckles are too tight you get VERY immediate > response on the rudders on the ground. > If they are too loose you get a "waffling" "inconclusive" response to > rudder input. This can lead to shimmy. > > regards > Rob > > Rob Thompson > 0429 493 828 > > > On Mon, Sep 21, 2020 at 6:01 PM Győző Horváth <[email protected]> > wrote: > >> Hi Rob, >> >> Thanks for your advice. >> We checked the shaft. >> There is a tiny movement of the shaft. >> Is there any acceptable limit (if yes, how it should be measured) or no >> movement is required? >> >> BR >> Gyozo >> >> 2020. szept. 20. dátummal, 8:45 időpontban Rob Thompson < >> [email protected]> írta: >> >> >> If your cables are properly adjusted, it is likely that the bearings on >> the tailwheel shaft are a bit worn or the nut on the top of the shaft is >> not tight enough. >> Lift up the tail and check to see if there is any movement up and down or >> side to side. >> A small amount of forward pressure on the stick stops the shimmy. >> >> >> regards >> Rob >> >> Rob Thompson >> 0429 493 828 >> >> >> >> On Sun, Sep 20, 2020 at 3:42 PM Győző Horváth <[email protected]> >> wrote: >> >>> Hi, >>> >>> I often experience shimmy of the rear gear when I operate on concrete. >>> It is linked to a certain speed during acceleration for take off and after >>> landing as well. >>> Springs and cables seem to be OK. Tyre is not worn. Pressure is OK. It >>> happens on international airports with good quality asphalt as well. >>> Does anybody of you have such experience? Why is it not allways, just >>> often? >>> How can I avoid it? How dangeruos it is to the glassfiber material of >>> the tail. >>> With many thanks and best regards >>> Gyozo >>> >>> >>> >>> >>> >>> >>> >>> --------------------------------------------------------------------- >>> You are subscribed to the Dimona Owners Group mailing list. >>> This list is archived in public. http://waikeriegliding.com/dog/ >>> To unsubscribe, send email to: [email protected] >>> >>>
