Tail Wheel Attach Point on SR
Posted: Fri Feb 17, 2012 10:58 pm
This weekend I was stringing cable for the rudder. I noticed that where th
e tail wheel spring (the long pipe) attaches something was not right. Upon
closer inspection I noticed that horizontal piece (Left side of Fus to Rig
ht side) had bowed/warped under the minimal weight of the empty fus. This
was largly my mistake which I quickly corrected. But it got me looking clo
sely and thinking. Under shock load, like that of the tail bouncing, the f
orce is transfred into this horzontal member consisting of a buildup of sev
eral pieces. My tail is attached to the second hole from the BOTTOM of the
bracket. I must admit there has been lots of email on where this goes to
get the top of the tail "level" and mine is still not level (no engine yet)
. I was not comfortable that the shock load wouldn't eventually crack the
flanges where the horizontal piece attaches to the side skin. I installed
4" of angle to transfer the load from the horizontal piece to the skin. Th
e 4" angle runs parallel lengthwise toward the front of the fus.
Has anyone else looked at this and been concerned? Within general reasonab
le tolerance, all the SR's should be about the same with respect to the tai
l spring (pipe) and the levelness of the top of the tail wheel. Where is e
veryone else seeing their tail attach, i.e. which hole?
Rick Muller
SR70
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e tail wheel spring (the long pipe) attaches something was not right. Upon
closer inspection I noticed that horizontal piece (Left side of Fus to Rig
ht side) had bowed/warped under the minimal weight of the empty fus. This
was largly my mistake which I quickly corrected. But it got me looking clo
sely and thinking. Under shock load, like that of the tail bouncing, the f
orce is transfred into this horzontal member consisting of a buildup of sev
eral pieces. My tail is attached to the second hole from the BOTTOM of the
bracket. I must admit there has been lots of email on where this goes to
get the top of the tail "level" and mine is still not level (no engine yet)
. I was not comfortable that the shock load wouldn't eventually crack the
flanges where the horizontal piece attaches to the side skin. I installed
4" of angle to transfer the load from the horizontal piece to the skin. Th
e 4" angle runs parallel lengthwise toward the front of the fus.
Has anyone else looked at this and been concerned? Within general reasonab
le tolerance, all the SR's should be about the same with respect to the tai
l spring (pipe) and the levelness of the top of the tail wheel. Where is e
veryone else seeing their tail attach, i.e. which hole?
Rick Muller
SR70
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