| mast tang for trapeze #8185 06/24/02 11:11 AM 06/24/02 11:11 AM |
Joined: Jun 2002 Posts: 45 South Florida 89umiamiH16 OP
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Posts: 45 South Florida | i'm buying a single trapeze syatem for my H16 but my mast tang doesn't have the extra hole for a trapeze shackel. should i put a hole in it? i'm afraid with all the extra stress it might pull out. should I get a second mast tang and rivet it on above the shroud tang or is there a smaller one specifically for this purpose? anyone else ever have this problem?
justin
um engineering student
my H16 is older than i am
| | | Re: mast tang for trapeze
[Re: PSAILOR]
#8187 06/25/02 07:16 AM 06/25/02 07:16 AM |
Joined: Jun 2002 Posts: 45 South Florida 89umiamiH16 OP
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Posts: 45 South Florida | thanks,
thats how i'll probably end up doing it. it just sees like a lot of stress on that one tang. i'm predicting critical equipment failure for this one. (and my girlfriend going overboard when that tang pulls out)
justin
um engineering student
my H16 is older than i am
| | | Re: mast tang for trapeze
[Re: Sailortect]
#8189 06/26/02 02:27 PM 06/26/02 02:27 PM |
Joined: Jun 2002 Posts: 45 South Florida 89umiamiH16 OP
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Posts: 45 South Florida | Very good points. However, my main concern was really the combined downward components of the forces applied by the shrouds, forestay and my trapezing girlfriend, being counteracted by the reaction force upwards at the base of the mast causing a shearing force on my rivets. I probably wouldn't even be considering that as a problem except that the rivets on my mast base recently sheared while stepping. so now i'm questioning the integrity of all the rivets on my old boat before i apply any additional load. it's nice to hear some engineering jargon though, all this sailing slang is not my native language.
justin
um engineering student
my H16 is older than i am
| | | Re: mast tang for trapeze
[Re: 89umiamiH16]
#8191 06/27/02 06:52 AM 06/27/02 06:52 AM |
Joined: Jul 2001 Posts: 106 West Texas Hobie Dave
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Posts: 106 West Texas | By your mast tang not having a seperate hole for the trapeze wires, it is an old set up. I do not know about the old mast tang, but the one on my mast has twelve 3/16 rivets around a curved surface. There is no way that one can pull straight out on all of the rivets at any given time. This is a very good design. Even when you drill the rivet heads, you have to take a chisel or a punch to pop the rivet loose from the tang. If your rivets are not loose, go sail, have fun, and do not worry. I have more problems with loose screws on my boat, which I have been putting Lock Tite on. The most important thing on any piece of equipment is to take care to inspect it and keep it in good working order.
If you are worried about this, why not find out what the sheer strenght of a 3/16 SS rivet, multiply it by twelve, and add the dynamics of pulling on the rivets from different angles at the same time. | | |
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