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Treetools Blog

Yale Prism with Ben Palmer

Richard Tregoweth - Saturday, November 14, 2015

Yale Prism, designed by John Canning in Australia, is one of Treetools most popular tree climbing lines. The 24-strand, all-polyester construction keeps elongation to a minimum, making Yale Prism ideal for climbing SRT… and the 11.7mm diameter is a little easier on the hand.

It can be difficult to gauge the level of bounce in a climbing line when used in a tree. The friction from re-directs often gives a false reading.

In Treetools opinion the only way to get the real feel for the amount of elongation in a rope is to drop a single leg, as long as possible, from a suitable anchor and load the line with the climbers weight furtherest from the anchor point. 

Our good friend Ben Palmer from MIT decided Treetools 'elongation test' was a worthy challenge.

Ben found a single 60m drop off a bridge and went to the bottom to see how the Yale Prism performed with weight of a climber on a single leg of the line.

Check out the video below to see what Ben has to say.

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