Original Posted By: "Rick Holland"
Being the inquisitive type, I just had to go back and measure the tailwheel and rudder cable geometry on NX41CC after that last round of discussion. 41CC has separate cables for the tailwheel and rudder, both of them anchor at the same point on the rudder bar. Back at the tail the rudder horn attach points are 10-1/4" apart and the tailwheel horn attach points are 8" apart, which does indeed result in different amounts of deflection of each of them with the same amount of deflection of the rudder bar. Full deflection results in about 2-1/2" fore-and-aft travel of the rudder horn attach point.Running the geometry on this in AutoCAD, for the same deflection of the rudder bar I find that the tailwheel will deflect just a bit over 8 degrees *more* than the rudder will, which several of you have made note of. On grass, I doubt that it would ever be noticed. On pavement, it might but I haven't even thought of it making any noticeable difference. Just one more thing to go out and experiment with, because it is very easy for me to change the attach points on the tailwheel horn outboard to just about match the rudder attach points... Corky made the horns extra long for adjustment purposes.I was at the hangar yesterday to return a trailer that I had borrowed and couldn't let poor 41CC just sit there and watch, so I went up and did a couple of circuits. I operated off the grass on all but the last landing and I'm finding out that grass is my friend (and my landings' friend). Just like there is nothing that a good coat of paint won't cover, there is practically no landing that a good cushion of grass won't take care of. So now 41CC is proudly wearing grass on the tailwheel parts and around the brakes on the mains.Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Date: Mon, 8 Oct 2007 12:51:21 -0600
Pietenpol-List: tailwheel cables
Re: Pietenpol-List: tailwheel cables
Original Posted By: "Rick Holland"
Re: Pietenpol-List: tailwheel cables
Original Posted By: "Peter W Johnson"
Subject: Re: Pietenpol-List: tailwheel cablesIn a message dated 10/8/2007 1:53:26 PM Central Daylight Time, at7000ft(at)gmail.com writes:Oscar>From what I understand Chuck and others modified their cable attach points onthe rudder bar to provide less tailwheel travel not more as yours is rigged now. I guess it may not matter if you only fly off grass. RickThat's right, Rick. One of the many things I learned building and flying Radio Controlled planes, was that you don't need nearly as much deflection on thetail wheel, as you do for the rudder. However, R. C. planes may be rigged that way so it doesn't use as much current, or stall the servo.Mine is easily adjustable, though, and since my tail wheel is only 3 1/2", I may increase the deflection of the tailwheel.Chuck G.NX770CG________________________________________________________________________________
Subject: Re: Pietenpol-List: tailwheel cablesIn a message dated 10/8/2007 1:53:26 PM Central Daylight Time, at7000ft(at)gmail.com writes:Oscar>From what I understand Chuck and others modified their cable attach points onthe rudder bar to provide less tailwheel travel not more as yours is rigged now. I guess it may not matter if you only fly off grass. RickThat's right, Rick. One of the many things I learned building and flying Radio Controlled planes, was that you don't need nearly as much deflection on thetail wheel, as you do for the rudder. However, R. C. planes may be rigged that way so it doesn't use as much current, or stall the servo.Mine is easily adjustable, though, and since my tail wheel is only 3 1/2", I may increase the deflection of the tailwheel.Chuck G.NX770CG________________________________________________________________________________