Title: Rigged tailwheel steering
Yesterday I attempted to install the steering chains per print and they were rubbing on the bottom rudder fairing at full rudder deflection. Plus they were clipped onto the rudder horn and the tailwheel horn with those spring clip abominations. once you spring them open enough to install there's not a good way to smoosh them back together, so you end up having to run safety wire around them to make sure they stay put. Plus, when Robert August had his RV6, we noticed during the condition inspection that they were eating their way through the rsoft aluminum of teh rudder horn. No thank you. I did some research last night and discovered a picture of Vans own RV7 demonstrator that has been modified to use AN42B eye bolts at that location, which saves the rudder horn and also drops the fwd end of the chain about 1/2", which is enough to eliminate the rubbing issue. The phrase "practice what you preach" comes to mind here. The problem is, those AN42B eyebolts are $13 a pop at spruce, and I need 4 of them. with shipping, probably $70, which seems a bit spendy for this use. This morning, I ran down to the yard store to see if they had any in their surplus hardware bins and it was my lucky day! I found a whole bin of them that were the wrong length and drilled through the threads but who cares, loose hardware at the yard store is $12 a POUND. I picked up a handful of bolts, some Axle nuts cotter pins and a few other odds and ends. Instead of $70, I walked out with a paper bag full of goodies that only cost me $6 bucks. I love the yard store! My bench vise is in my garage and the plane is obviously not, so I was unsure how long these actually needed to be. When I got home, I clamped them in the vise and got out the cheap harbor freight tap and die set I had at the house and cut threads down to within about 3/16" of the head. Once I did a trial fit on the plane, I determined that 5/8" was plenty, so I cut them down to that length with my dremmel. Take that Aircraft Spruce :) I fastened the springs directly to the eye bolts at the tailwheel, and used stainless chain add-a-links rated for 300 lbs at the rudder. On the rudder end I also had to enlarge the hole in the eyebolts slightly to get the threaded end of the link thru it. I don't recall what size drill bit I used, but the increase was pretty insignificant. So, When it comes time to paint the plane, You can get the rudder off without scratching the heck out of the horns with those spring clips, it doesn't rely on a big wad of safety wire to keep it from falling apart, and it looks about a million times better that the crappy spring link/scratched rudder fairing abomination that Van's has in their drawing but doesn't even follow on their own demo airplanes. Best of all, it was on the cheap So between yesterday and today all of that monkey motion took a while but the result turned out pretty nice if I do say so myself. The chains have a little bit more slack than I would like, but if I take out another link they will be too tight. This chain has a tendency to stretch in use, so after a few hours I suspect it will have grown enough that I can take out a link at that point and they will be just about perfect.


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