On 8/14/2021 12:13 PM, John Bouyea wrote:
Here is a drawing I made this morning to solve a "non-problem" I
experienced. The rudder bar weld broke on my KR last week. Supposedly this
isn't a problem but I'm fixing it anyway.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Actually, it is a "potential" problem that I cautioned about several
years ago. My right side pilot pedal broke sever years ago when I
landed at Langford's place. Fortunately it broke on the ramp in a
turn-around and not on landing. My pedals are top mounted but the
problem is related to all "Rand" pedal setup, top or bottom mount. The
right pilot pedal goes across to the right side where the rudder cable
attaches. Any pressure applied to the pedal (tail draggers are really
the only concern as tail wheel forces are added over and above rudder
forces) causes both welds on the pedal assembly to flex. After 500 or
so hours mine broke at the first vertical weld above the foot pad. Mark
and I removed the assembly and he patched it to get me home. I then had
gussets welded in to strengthen the assembly. In the following photo
the weld that broke is seen in the upper center and is light gray from
painting after the fix. You can see the gusset added. For anyone still
building or others that can remove the assemblies without a great deal
of hassle I'd suggest a gusset for all 90 degree welds.
https://www.dropbox.com/s/igceovjb6hdk8fh/image000000-6.jpg?dl=0
For John, did you find a suitable tail spring? I looked at a golf cart
again the other day and they look like they had the KR in mind when they
designed the springs.
Larry Flesner
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