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Old 29 April 2006, 12:33   #1
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A Frames

Why are they double? If you are doing waterskiing, persumably everyone uses D bolts in the transom for the yoke. No one is going to put weight on the A Frame.

So why have such a hunk of metal. Why not a single arch?

Why not three pillars - one for each light and the ones on the side with cleats, and the one in the middle with a platform for radio aerial and gps aerial?
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Old 29 April 2006, 13:05   #2
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Yep, we use the A Frame for wakeboarding. Wakeboarding requires the tow line to be higher than skiing. It makes jumping etc easier as the line is not pulling down. Mines a double tube well solid affair.
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Old 29 April 2006, 13:05   #3
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our avon has got a towing point at the top of the A-frame and i'm sure roycruses ribcraft has got one as well, it keeps the rope away from the prop.
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Old 29 April 2006, 13:09   #4
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Mine has a single A frame, a very uninspiring black bit of pipe which is overdue for a coat of paint. Not sure if it came with the boat or was made by a previous owner, I suspect the latter.

A lot of it is probably people wanting a big bling shiny thing on the back of their boat

Coat on and heading for the door!!!
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Old 29 April 2006, 13:26   #5
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Quote:
Originally Posted by Millermob
our avon has got a towing point at the top of the A-frame and i'm sure roycruses ribcraft has got one as well, it keeps the rope away from the prop.
Yep, Roy tows from his A Frame and he ain't no lightweight back there!!
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Old 30 April 2006, 13:22   #6
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I use my double A frame for wakeboarding too, it does a proper job..

Shaggy
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Old 30 April 2006, 14:17   #7
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How are your A frames fixed under the deck?

To answer your questions about single poles Bruce the Tohatsu's (extremely similar design to your boat) had a nav light pole with a pad for antenna at the top. Which I thought was a cracking idea, unfortunately they vibrate a lot because there is no bracing and this shakes things loose.

Same thing with single A frames so that's a good reason for a double A frame. Apart from that they do look kinda Snazzy.
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Old 30 April 2006, 15:47   #8
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I have double A frames on two of my RIBs. Would not hessitate about towing off either of them. In answer to your question they are bolted through the transom, and through the deck.
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Old 30 April 2006, 16:11   #9
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I fitted a single pole to mine for mounting the nav light and VHF antenna (like the Tohatsu, I suppose - never seen one). I went for this, as it leaves room for the auxiliary outboard on the opposite (port) side of the transom.
It's practical, but admittedly, doesn't look as good as an A frame. I'd also have to knock-up some more bracketry, if I wanted to fit a GPS antenna, radar reflector, etc.
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Old 30 April 2006, 16:17   #10
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I certainly do tow from mine - its designed for it though and has a rope attachment post at the top - I'm over 20st and no problems so far.
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