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Old 31 March 2010, 11:31   #1
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G.r.p. A frame

G.R.P. A FRAME

Any ideas the forum may have
thinking now on an A frame just to hold

Navigation lights

Anchor light

Ariel

Gps receiver

Radar reflector.

I would like to make it in glass fiber .I have seen a few on some overseas ribs.


any comments welcome.
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Old 31 March 2010, 12:38   #2
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Quote:
Originally Posted by Sonar View Post
G.R.P. A FRAME

Any ideas the forum may have
thinking now on an A frame just to hold

Navigation lights

Anchor light

Ariel

Gps receiver

Radar reflector.

I would like to make it in glass fiber .I have seen a few on some overseas ribs.


any comments welcome.
we haven't had much luck with grp a frames, you have to make them in 2 parts and bond them together, we did a mould and moulding for a large swan sailing boat and it was a right bugger, ocean did one in the early days, you will always get stress cracks on them
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Old 31 March 2010, 12:41   #3
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we haven't had much luck with grp a frames, you have to make them in 2 parts and bond them together, we did a mould and moulding for a large swan sailing boat and it was a right bugger, ocean did one in the early days, you will always get stress cracks on them
I thought that as well a two part mould but the joining of the two parts may be a problem so far as strength goes.

but where there's a will there's a way.
thinking on it now might have come up with an answer but its a long winded way of doing it.
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Old 31 March 2010, 12:53   #4
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I thought that as well a two part mould but the joining of the two parts may be a problem so far as strength goes.

but where there's a will there's a way.
thinking on it now might have come up with an answer but its a long winded way of doing it.
you could lay up a frame like a "c" shape and then a panel that fits into the inside, does that make sense?
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Old 31 March 2010, 13:49   #5
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you could lay up a frame like a "c" shape and then a panel that fits into the inside, does that make sense?
Then epoxy one into the other.
While leaving a hollow section for wiring sounds a good idea.
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Old 31 March 2010, 20:19   #6
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How weird is that? I was googling 'grp a frame' only last night. Nothing turned up, bar standard factory issue affairs.

Currently experimenting with a view to building something special for my 4.7 Futura SIB.
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Old 01 April 2010, 01:07   #7
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How weird is that? I was googling 'grp a frame' only last night. Nothing turned up, bar standard factory issue affairs.

Currently experimenting with a view to building something special for my 4.7 Futura SIB.
Sounds interesting .
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Old 01 April 2010, 05:33   #8
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Just going to chuck a thought in here......

Could you use a windsurfer mast or two as a basis, then you only need to design the corner fixings / crossbar which as it needs flat aea to mount your toys, would be a whole lot easier to mould a hollow section (vould do it like a laser dinghy, but in miniature) - Mould "pole inserts" into the ends, 'poxy the whole lot together, Job done!

If you fixed the verticals to the transom using U- bolts then you run the cables up through the bottom of thre pipe. (and if you make a screw fixing at the top, the thing could dismantlwe to make cable laying sooooo much easier......) Also would ship "flatpack"
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Old 01 April 2010, 05:37   #9
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East coast fibreglass do fibreglass tubes, only problem is moulding corner pieces.
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Old 01 April 2010, 05:49   #10
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as windsurfers masts but with some carbon fibre poles, might not crack as much! but that might be expensive....

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