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Old July 26th 17, 09:36 AM posted to rec.aviation.soaring
bumper[_4_]
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Default The Cobra "Ramp Grind" - a fix

On Tuesday, July 25, 2017 at 8:13:44 AM UTC-7, wrote:
My bolts were mangled as wll, so I bought a couple of 1/4" x 2.5" carriage bolts and lock nuts to replace these. Also bought a foot of I think it was 3/8" fuel line and cut two 1/2" pieces to make the bumpers. Bumper should add these bumpers to the kit :-)


Bottom line: Well worth the price!


Tom,

Thank you for the review. Apparently Cobra adds the short length of bumper hose to the stop bolts on some and on others doesn't bother. The bumper makes some sense with their metal bolt slider, as it would otherwise bang metal on metal into the stop bolt. The SRS sliders are of UHMW PE, an exceptionally impact resistant long chain polymer that provides some damping.

On some trailers, the head of the carriage bolt will butt against the SRS slider before the slider reaches the rubber hose bumper. This should not damage the SRS at anything resembling normal ramp extension speeds. Though one could grind off the front part of the carriage bolt head if desired - and add the hose I didn't include :c).

bumper