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Old 05 July 2009, 11:13   #1
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rib shape

please give your opinion on these two observations

1) why some eu & us ribs have snub bow tubes were as uk are pointed.

2)allso outboard are being mounted on platform extensions past the transome
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Old 05 July 2009, 11:31   #2
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please give your opinion on these two observations

1) why some eu & us ribs have snub bow tubes were as uk are pointed.

2)allso outboard are being mounted on platform extensions past the transome
On point 2 we hope to see a full review in next RIB International of Armstrong brackets fitted to a 650 and a 785, my basic understanding is the bracket extends the boat length (ie. a 650 becomes a 750) and puts the engine/prop in smoother water making it perform better all round. (very basic)
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Old 05 July 2009, 11:37   #3
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Originally Posted by C2 RIBS View Post
On point 2 we hope to see a full review in next RIB International of Armstrong brackets fitted to a 650 and a 785, my basic understanding is the bracket extends the boat length (ie. a 650 becomes a 750) and puts the engine/prop in smoother water making it perform better all round. (very basic)
If that's right, would it work for any length of RIB?

I think the snub nosed/square bow's are more for the leisure/big tender market aren't they?
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Old 06 July 2009, 04:26   #4
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Quote:
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please give your opinion on these two observations

1) why some eu & us ribs have snub bow tubes were as uk are pointed.
Is it not easier (therefore cheaper) to connect port & starboard toobs when you "only" have a 45 degree bend to worry about?


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2)allso outboard are being mounted on platform extensions past the transome
I'll echo C2's comment here, but it does park your main weight a lot further aft so may adversley affect handling on a non race boat. Rememebr the boat will have been designed to take the engine on the transom....... (think the difference moving full portable tanks around o na small RIB) I do have to ask, if you want more space, why not just buy a bigger rib in the first place?
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Old 06 July 2009, 05:52   #5
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You have more clear deck space with the engines mounted on a gill bracket.
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Old 06 July 2009, 09:20   #6
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i too thought that snub /blunt bows were aimed at the foreign leisure market small ,boats look wider and there fore look safer for the general non boating public especialy if used as a tender ,plus side is you can run up to a jetty or wall or another boat and hold it there whilst persons emb/disembark a bit easier in evening dress,,,not likely where i come from lol,,,,,with regards to engines further aft unless the hull is extended i dont see much speed ,,in theory though the longer the hull the faster it will go for a given hp ,,why destroyers were long and narrow and owing to displacement boats riding on wave set up ,its like pushing a log through the water the longer the log the faster it goes ,no doubt some academic on here will explain it better .lol
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Old 06 July 2009, 10:27   #7
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The theory on having the outboards further back is that they can run higher which in turn results in less drag from the gearbox - the faster you go the better it gets, I would imagine much below 50 MPH the advantages would be limited to more space and the C of G further back if that is what is wanted.
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 07 July 2009, 07:28   #8
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You have more clear deck space with the engines mounted on a gill bracket.
Another one that puzzles me..... My outboard doesn't sit on the deck, and even at that, it only overhangs the inside of the transom by the grand total of about 4".

Two 30L hulk tanks on the other hand take up substantially more space! .......
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Old 07 July 2009, 08:17   #9
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Measure it again when it's trimmed right up!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 17 July 2009, 07:29   #10
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updates

RIB international magazine have produced in this issue the report on the two Armstrong brackets we took out in April snow/hail storms which cover the new brackets and how they worked/performed on these boats for the day
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