Curtis:

I admire enormously people who can make calculations like that. Sure beats
standing there and giving the rail a good shake.

Actually, 450 lbs of force seems like a lot to me. The tubing would be
plenty strong  but it might bend or come apart with a sudden force that
great. 

Does anyone have a clue what force it might sustain assuming it is attached
sufficiently well to the boat?


Graham Stewart
Agile. R22, 1976
Kingston Ontario Canada

-----Original Message-----
From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of
Curtis Ruck via Rhodes22-list
Sent: August 13, 2017 9:48 PM
To: The Rhodes 22 Email List
Subject: Re: [Rhodes22-list] New traveller and shift extender.

Graham,

When I worked on my windward traveler on harken track on fiberglass tubing,
I did the calculations for load... at 30 knot winds (estimating for a worst
case gust) estimations had the traveler only putting 450lbs force on my two
backstays.

Though my math was focused on the traveler rail and tubing failure, the
force should be comparable to what is exerted on railing.
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