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Old 30 January 2011, 14:15   #21
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Old 30 January 2011, 14:23   #22
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I looked at the pics. In my humble opinion, if the toobs are merely decorative and have little or no functional purpose it is not a rib. Beautiful stepped hull race boat but the "RIB version" is not different than the hard boat.

I'll leave it to Cookee to explain what is to be gained by adding tubes to the design.

There is another builder in the UK that builds larger hard boats (cabin versions) with a very small rubber band on both sides. I dare say, to a purist, not a rib.

Sales gimmick yes, prevent dock damage yes, RIB no.

If RIB design was simply adding tubes to hard boats, why are we all running ribs? We all enjoy the performance we're getting with their unique design although some it seems, don't seem to recognize that there is any thing special about them at all...other than a couple of air filled bladders?
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Old 30 January 2011, 14:32   #23
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... although some it seems, don't seem to recognize that there is any thing special about them at all...other than a couple of air filled bladders?
By "some", do you mean the crowd over on Boatmad. They call them water-wings and say the RUDEST things about us
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Old 30 January 2011, 14:35   #24
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So back to the topic if I "bolt" some tubes to a speed boat hull and they have "function and purpose" then it would be a RIB?
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Old 30 January 2011, 14:39   #25
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So back to the topic if I "bolt" some tubes to a speed boat hull and they have "function and purpose" then it would be a RIB?
Certainly!

The picture below shows a Redbay test pilot (Tom, I think) testing one of their early speedboat hulls (minus a bit of upperwork)

After a few laps, it was felt that tubes would be a positively beneficial addition
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Old 30 January 2011, 14:49   #26
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I looked at the pics. In my humble opinion, if the toobs are merely decorative and have little or no functional purpose it is not a rib. Beautiful stepped hull race boat but the "RIB version" is not different than the hard boat.

I'll leave it to Cookee to explain what is to be gained by adding tubes to the design.

There is another builder in the UK that builds larger hard boats (cabin versions) with a very small rubber band on both sides. I dare say, to a purist, not a rib.

Sales gimmick yes, prevent dock damage yes, RIB no.

If RIB design was simply adding tubes to hard boats, why are we all running ribs? We all enjoy the performance we're getting with their unique design although some it seems, don't seem to recognize that there is any thing special about them at all...other than a couple of air filled bladders?
For my 2 peneth worth I agree, none of these are a RIB. Not trying to be elitest, and I am not sure how you can put a scientific definition down, but gut feel definately says that is not a RIB !
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Old 30 January 2011, 15:31   #27
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Oh man, when Cookee sees this, they're gonna havta shoot him in the ass with a tranquiliser dart. He was so looking forward to a tubed version of his new handcrafted hardboat.

He might still be OK though, it did look a bit "tippy"
There are any number of RIB marketed in the UK based on hard boat hulls - as it is common in the US it is easier to splash someone else's design (do a search for "splash" on Boatmad) and make you own moulds with a bit of modifying to get a predictably good handling boat that start from scratch.

I believe there was a US hull that reappeared under several different names with the same identical fault in the port spray rail forward!

The boat below was a conversion from a hard boat and we modified the design to make it a bit more pleasing to the eye! The boat handles just fine, is mare stable at rest and I think the reason that RIBs are so popular is that they install more confidence in the general buying public - as to whether a RIB is better than a hard boat that is down to personal preference!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 30 January 2011, 16:15   #28
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we modified the design to make it a bit more pleasing to the eye!
hooz iye?
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Old 30 January 2011, 16:31   #29
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ribs that started life as hard boats are quite common ,for instance leeway from a phantom hull ,crompton from a phantom hull , Nick Barsch rib from a phantom hull ,plancrafts first ribs were from one their hard boat hulls , BWM rapier and its variants from a revenger hard boat , picton also made some ribs from their hardboat hulls .so to answer the original question yes it is possible to make good ribs from hardboats ,the largest we have been involved with was a 14mtr v-type that came from a hardboat hull and photos are on my web site www.tidel.biz .we are just about to tube an 11mtr version of the 14mtr hull .
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Old 30 January 2011, 16:35   #30
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Cookee, the problem I see with modifying a hard boat is that you're not taking advantage of the freedom a tube gives the V design.

My boat and many like it have 24-25 degrees of deadrise. I'd be hard pressed to find a production hard boat with that sort of deadrise to bolt tubes to. The 24+ deadrise gives an incredible advantage in a slop, I believe that's the part that makes the UK RIB's so popular in rough water... not the puffy rubrails.
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