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Old 26 October 2004, 04:06   #21
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Quote:
Originally Posted by Hightower
Carisbrook, great place!!

Zippy, if you want a pattern and in ,my area come on over to my place and measure my A frame on the Deepsea. Its only a single and it only bolts onto the transom, very tough and I'd be happy to swing around on it in a F8. Has all my nav lights, gps and vhf hanging on it! Could show you the dash and screen I've made for the consol at the same time.

Andy

Thanks Andy,

Will have a measure of mine this afternon when have picked it up!

Cant really do much till then but will drop you a pm to organise a time and place.

Unfortunaty having taken yesterday and today off work i can just guess what mess im going to find on my desk tomorrow. may have to be the weekend now as its dark in the evenings by the time i get away from the office.

Howard.
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Old 26 October 2004, 04:40   #22
DGR
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Make: Ribcraft
Length: 7m +
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A-frame attachment...

I've got a big double A-frame on the back of my 7.8 - it is bolted through the transom, and the front legs are bolted through the hull. The bolt heads are recessed into the hull surface, but you can still see them!! It seems quite secure......

D...
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Old 26 October 2004, 07:46   #23
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Country: UK - England
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How sturdy does an A-frame need to be to tow a waterskier? I have seen simple ski poles advertised on boating supply websites but it's not clear if these would be suitable for a rib...


George
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Old 26 October 2004, 07:51   #24
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Country: UK - England
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Quote:
Originally Posted by ADS
I think that could be Bilge Rats boat.

It is and Rogues now wrong (sorry Rogue) since this pic was taken i've changed my engine to a 60HP Yam 4 stroke and it only just fits under the A frame with the engine tilted up, it was made to measure by a local guy to me that does stainless work, the remit was it fitted under a standard 6' garage door and it does, what i didn't take into account was one day i'd want to change the engine and bigger 4 stroke would have problems lifting under the frame, ho hum its not that bigger deal really and something i can live with.

Its has feet on the inside tubes that each have four big screws going into the deck and the transom tube is fixed by 3 bolts each side going through the transom, three plates welded between the tubes each side an a big one along the top where the lights, ariels and antenna are mounted, all wiring goes down through the inside tube.
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Old 26 October 2004, 07:54   #25
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Have you thought about putting hinges on the bottom of it and allowing it to fold down into the boat?, with two clasps/clamps to keep it upright against the transom when afloat? this configuration allows you to reduce wind resistance while towing and get the thing in your garage. I have seen two or three boats now like this and am more impressed every time!
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Old 26 October 2004, 08:06   #26
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CND...this sounds like a good idea, however i wanted a double A frame and funds at the time did not allow these sorts of additional things, mine was the first A frame he'd made, i changed the design halfway through which didn't help either, i know believe my decision to fit a double to be the correct one.

In essence the A frame is for mounting lights and instrumentation to gain height and its not recomended to tow from it unless its been specifically designed or re enforced to do so, most ski poles go through the deck and are fixed inside the hull, i've saw a single stainless steel frame snap like twigs towing a flooded canoe !!!

Supose it all depends what you want and remember the more weight you add at the transom the slower your'll go !
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Old 26 October 2004, 14:21   #27
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Well its arrived and!!

Was out looking at it earlier before it got dark and woundering about fixing.

I want to fix the front down tube to the deck. my question.... sould i be looking to epoxy and glass a block of wood onto the deck to screw into? i dont have under deck tanks so thats not a worry.

Then the back down tube can be bolted through the transom.?

Any thoughts??

Thanks
Howard
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Old 26 October 2004, 19:49   #28
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You'll have to find a fixture that goes in though the deck like a toggle bolt or something. If the layup is like mine you can't simply remove the rear deck gland and simply stretch under to screw a nut on the end of a bolt as the transom supports that go below deck level, also run lenghways down the inside of the hull toward the bow to support the deck and prevent you from placing the A frame in the Ideal position. The only other way to securley attatch a double A frame could be to drill through the hull right where the tubes meet the deck and putting dome head screws though, but I don't like the Idea of drilling though the hull below the water line.

I'm sure someone else could come up with a more suitable fixture Idea though.

What's wrone with a single?
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Old 27 October 2004, 03:39   #29
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My, forward legs of my double A-frame are bolted through the hull, and have 2 reinforcing stainless plates on the waterside of the hull. It makes the A-frame very solid and has given me now trouble, with water ingress or anything else for that matter. Ribcraft do this also, and they have had no problems up to now with it either as far as I know.

I'll post some pictures later when I get home of the stainless reinforcing plate. I would imagine it would strengthen the join between the transom and hull as it is bolted to both.
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Old 27 October 2004, 15:53   #30
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Humm...

Maybe I should take the easy option and have a really substantial single frame.

Easier and cheaper to design, produce and fit but more hassle fitting things too..
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