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Transom flaps?

Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13945
Printed Date: 27 Jun 25 at 12:25am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com


Topic: Transom flaps?
Posted By: GybeFunny
Subject: Transom flaps?
Date Posted: 24 May 22 at 1:26pm
The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?


Replies:
Posted By: fab100
Date Posted: 24 May 22 at 5:26pm
Originally posted by GybeFunny

The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?

Boats with double bottoms and open transoms?

Sorry, couldn't resist it. The scorp I had back in the day was a great boat, like a puppy straining at the leash


-------------
http://clubsailor.co.uk/wp/club-sailor-from-back-to-front/" rel="nofollow - Great book for Club Sailors here

Posted By: mole
Date Posted: 24 May 22 at 5:31pm
Bent and mis-shaped carbon?
It was either not a balance layup at manufacture or never carbon in the first place.
I would replace with the same, except quality made version

Posted By: sawman
Date Posted: 24 May 22 at 6:27pm
Originally posted by GybeFunny

The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?

 On scorp 1971, I have clear 2mm lexan for the flaps. the lexan was cut to shape at a local plastic sheet supplier to my pattern. They are secured with a shockcord "hinge" at the top. they are not secured with a line - the shockcord is tight enough to keep decent closure, but allows them to open if the boat needs emptying. However, I always tape up the bottom in light winds, as they will leak if going slowly and too much weight at the back of the boat

Posted By: GybeFunny
Date Posted: 24 May 22 at 6:46pm
Originally posted by fab100


Originally posted by GybeFunny

The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?

Boats with double bottoms and open transoms?
Sorry, couldn't resist it. The scorp I had back in the day was a great boat, like a puppy straining at the leash



Haha good one, the RS200 I upgraded from had the same issue with shipping water in the transom as you sat with sails flapping on the start line!

Posted By: GybeFunny
Date Posted: 24 May 22 at 6:49pm
Originally posted by sawman


Originally posted by GybeFunny

The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?

 On scorp 1971, I have clear 2mm lexan for the flaps. the lexan was cut to shape at a local plastic sheet supplier to my pattern. They are secured with a shockcord "hinge" at the top. they are not secured with a line - the shockcord is tight enough to keep decent closure, but allows them to open if the boat needs emptying. However, I always tape up the bottom in light winds, as they will leak if going slowly and too much weight at the back of the boat


Thanks, I hadn't heard of lexan before but that looks good, do you know if it is possible to cut it yourself? I don't know of any local plastic sheet suppliers.

Posted By: Noah
Date Posted: 24 May 22 at 6:53pm
I used old OHP film secured with clear tape across the top edge, with the tape overlapping the edges of the film to keep them closed. Water pressure was enough to distort the film for emptying. Dirt cheap and generally lasted a couple of seasons.

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Nick
D-Zero 316


Posted By: eric_c
Date Posted: 24 May 22 at 7:09pm
Lexan is a trade name for polycarbonate.
I had 1mm polycarb sheet I think. Maybe thinner.
It's what many motorbike visors are made from

No hinge, it's just held by the pintle being bolted through it, it bends to let the water out.Thin shockcord to hold it closed, if the transom is flat and smooth it seals quite well.Maybe a 15mm overlap?
People sell A4 sheets of it on ebay.
Can be cut with a fine saw or abrasive disc in a dremeloid type of tool.

Alterative, use some sort of tape or 'fablon', but of course be sure that you're not littering the water if you need the flaps to open.

Posted By: sawman
Date Posted: 24 May 22 at 7:43pm
Originally posted by GybeFunny

Originally posted by sawman


Originally posted by GybeFunny

The transom flaps on my Scorpion are leaking, they are hinged carbon backed with pro-grip like P&B sell, they are pretty old and probably bent and misshapen so they no longer seal. What are people using these days?

 On scorp 1971, I have clear 2mm lexan for the flaps. the lexan was cut to shape at a local plastic sheet supplier to my pattern. They are secured with a shockcord "hinge" at the top. they are not secured with a line - the shockcord is tight enough to keep decent closure, but allows them to open if the boat needs emptying. However, I always tape up the bottom in light winds, as they will leak if going slowly and too much weight at the back of the boat


Thanks, I hadn't heard of lexan before but that looks good, do you know if it is possible to cut it yourself? I don't know of any local plastic sheet suppliers.

yes you can cut it yourself, with a fine toothed saw, Lexan is a trade name for a polycarbonate, it is resistant to cracking when drilling, which not all polycarbonate is. 
You might find someone on line who would cut to your pattern  - I happen to be near these guys.  https://www.bayplastics.co.uk/  I think I sent them a template by email and collected a few days later - these sort of firms are great to use


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