Main struts bent

Posts about mechanical systems on a Telstar, including the outboard engine.

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Main struts bent

Postby BoarX » Tue Mar 07, 2017 2:50 pm

Dear all,

I am looking for second hand Telstar 28 and recently checked out a boat which looked OK for the price except some obvious damage to the two main mast supporting struts. Apparently they were bent either when raised mast hit the bridge or in some similar situation. Current owner is (or pretends to be) clueless about the origin of the problem. According to him, mast raising mechanism still works. The bent is not all that significant, however what worries me is the fact that the welded connections of both struts to smaller diameter tubes right next to the attachment point to the boat deck are broken - apparently as a result of the same disaster. Here are some pictures, which I hope illustrate the problem:

https://drive.google.com/open?id=0B-Jol-UGHN_1LXRCb2JIc2pVa1U

https://drive.google.com/open?id=0B-Jol-UGHN_1b193U0V4UzRwb1U

https://drive.google.com/open?id=0B-Jol-UGHN_1QkVON25iYVp6R28

For comparison, here is a picture of the same area taken from some Youtube video:

https://drive.google.com/open?id=0B-Jol-UGHN_1aUswSlpMSkljbmM

Deck areas around the strut anchors appear to be undamaged and solid.

I am wondering if:

a) this kind of damage is tolerable if the mast raising and lowering still works

b) if anyone has experience repairing bent struts or altogether replacing them

Any info would be greatly appreciated!

Best,
Alex
BoarX
 
Posts: 3
Joined: Fri Mar 03, 2017 2:07 pm

Re: Main struts bent

Postby Ron » Wed Mar 08, 2017 1:10 am

You've got to be very careful when raising or lowering the mast. Keep an eye open for any lines which may grab on something. Something impeded the raising or lowering on this boat, or one or both were in compression while sailing. They must be pulling down (like a shroud), not pushing up.

Since the weight of the mast is coming straight down the two stainless tubes when lowering or raising it, any bends in these could eventually pose a problem. Ditto for the broken welds. I wouldn't trust them. Get them straightened if you buy the boat.
Ron Marcuse
Telstar 28 #59 "Tri-Power"
Ron
 
Posts: 988
Joined: Mon Nov 24, 2008 6:15 pm
Location: SW Florida & NJ Shore

Re: Main struts bent

Postby BoarX » Thu Mar 09, 2017 2:51 pm

Thanks Ron!

Are there any other active online communities devoted to Telstars? I am trying Google, but don't see much and most are dormant. Performance Cruising used to have some sort of owners forum, but I cannot seem to find it. I am not being disrespectful to the current forum, just trying to reach the broadest audience possible.

Thanks,
Alex
BoarX
 
Posts: 3
Joined: Fri Mar 03, 2017 2:07 pm

Re: Main struts bent

Postby vancouver » Fri Mar 10, 2017 1:12 am

I have already replaced on of them and now have another one bent. I believe in both cases it was a result on high wind and incorrect tension on the shrouds. The one replaced was with a heavy gauge stainless. Cut the fittings off the old and welded it on the new.
vancouver
 
Posts: 75
Joined: Thu Nov 27, 2008 10:58 pm
Location: Vancouver, British Columbia

Re: Main struts bent

Postby BoarX » Fri Mar 10, 2017 12:45 pm

Many thanks! Good to know it is doable! By the way, is there any info about correct shroud tension as it is evidently critical. On Thistles dinghies I am used to race we adjust shrouds and forestay tension using special measuring device.

Thanks again!
Alex
BoarX
 
Posts: 3
Joined: Fri Mar 03, 2017 2:07 pm

Re: Main struts bent

Postby Ron » Sat Mar 11, 2017 12:57 am

As a starter, the wire upper shroud can be adjusted with a tension gauge after you center the mast head and adjust the lowers. Final adjustments should be done in about 10 - 15 knots of wind. The stainless tube lowers ("A" and "B" frames) should be done at the dock to guarantee that they are NOT in compression. The must pull down, and not push up. There's a documented procedure in the manual that involves almost matching 2 holes (1/4 inch apart or so) then pulling out on the upper shroud wire to get the pin in. If they are in compression, expect the tubes to bend when you get into 20 knots of wind or more.

This mistake and catching a hanging line when erecting or lowering the mast would explain most, if not all, of these problems. I have probably raised and lowered my mast 50+ times in the last 10 years. Never had any trouble. You gotta keep an eye on everything to make sure nothing impedes it. If the winch handle suddenly needs too much force then stop and look.
Ron Marcuse
Telstar 28 #59 "Tri-Power"
Ron
 
Posts: 988
Joined: Mon Nov 24, 2008 6:15 pm
Location: SW Florida & NJ Shore


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