Gold: original ladder lock. Silver: custom ladder lock.After some testing, adding friction back to the bearings in the system did not look promising. Instead, I machined a custom ladder lock (shown in silver in the image). This design has a third aperture for the webbing which eliminates the self-unlocking angle.
Slip-testing results which compare the off-the-shelf ladder lock (shown in gold in the image) to the custom ladder lock are documented in the graph below.Blue lines: custom ladder locks. Gold lines: OTS ladder locks.
LAURA SHUMAKER
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