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Old 16 September 2004, 14:36   #51
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One point nobody seems to have touched on so far...

A decent twin tube S/S A Frame will act to stiffen the whole rear of the hull, in a similar manner to a strut brace in a performance car. When we ordered our boat from Tornado, specifying that we wanted the strongest (but lightest)configuration possible it was suggested that we have one fitted, also the reason that the fuel tank is under the console and not under deck. Plus on a boat with a narrow transom it gives a perfect place to mount the aux engine and fenders and fishing rods etc etc

And they look pants without them!
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Old 16 September 2004, 15:01   #52
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Sorry, wrong sized attachments...

Try these
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Old 16 September 2004, 15:05   #53
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Marki just out of interest as the 1st time I hear this. Are VHF waves dangerous?? Can you expand on it please?


Justwin it is logical and it will stiffen the rear of a boat. Can you clarify this one plese? also the reason that the fuel tank is under the console and not under deck don't get it.
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Old 16 September 2004, 15:10   #54
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No sorry, you're right. The fuel tank as you guessed has nothing to do with the stiffness of the rear of the boat, placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck.

Justin
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Old 16 September 2004, 15:13   #55
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(Quote) Marki just out of interest as the 1st time I hear this. Are VHF waves dangerous?? Can you expand on it please?




Only if the aerial pokes you in the eye
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Old 16 September 2004, 15:24   #56
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I have never been threatened by a vhf but assume if it is waving it's friendly
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Old 16 September 2004, 15:32   #57
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Quote:
Originally Posted by chrisallse
Only if the aerial pokes you in the eye
Nice one
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Old 16 September 2004, 15:55   #58
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Quote:
Originally Posted by Justwin
A decent twin tube S/S A Frame will act to stiffen the whole rear of the hull, in a similar manner to a strut brace in a performance car.
Err... if you need a welded stainless steel structure to stiffen your RIB, then boy-o-boy have you got problems! Firstly, the transom and hull design should be adequate in the first place, and secondly, if the rear section of the hull does flex, it will crack the stainless steel around the welds where it's most brittle, and subject any any other stressed areas of the stainless steel to a "work hardening" effect which will make it more brittle and vulnerable to sudden failure (like the Comet airliners).

Sorry, mate, but it sounds like Lawrence Lock did a sales job on you to sell you an A-frame!

Quote:
Originally Posted by Justwin
placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck
Why? This sounds like the salesman's words again! Decently designed box-section foam cored stringers should allow plenty of space for a tank and luggage space. Of course, if you splashed someone elses hull and just bodged the thing together with plywood inside, you might not feel confident about mounting a fuel tank inside...

All IMHO of course!
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Old 16 September 2004, 15:59   #59
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'A' Frames look well hard.

RIBs just don't look like RIB's without them
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Old 16 September 2004, 16:15   #60
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Richard you are right but it also does make sence this stiffening of the aft of the boat by putting an A-frame.

Quote:
Originally Posted by Justwin
placing the fuel tank in the console (or anywhere else for that matter) as opposed to under the deck allows for stronger construction under deck
I realy don't want to mention where I have heard that phrase before Justin. However, to Alan's delight I will give you a hint it was from the South side of the globe
THE SCORIPON (........for example - OK I know I'm going on and on about it but can't help it, is my new toy) has loads of space in the double bottoms and on top and on the side and everywhere and is bloody good and strong construction.
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