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Old 01 March 2005, 23:40   #31
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RibRoy, much are you paying for the seats?

What colors can you get them in?
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Old 02 March 2005, 04:45   #32
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Just talked to Henrik at Ullmanns, sending him a link to this thread now.
Maybe he will enlighten us regarding theories, colours and price.
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Old 02 March 2005, 05:46   #33
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Quote:
Originally Posted by slimtim
....If the seats worked perfectly and were 100% efficient (obviously impossible), the helmsman would sit on the seat and wouldn't move in relation to the earth ......

Tim
I donít think this is the case because if you consider how little real movement there is in a suspentions system even a little ripple would exceed the suspension envelope. Idea suspension absorbs the peak movements while slowly moving the suspended body to the new position, In effect it is a hysteresis system.

Having said that I still donít really understand what you are saying, is your concern that the seatsí movement describes the wrong arc
With regards to the shock heating up I think fitting a transmission shower would solve that problem although it might make the boat a bit wet
Des
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Old 02 March 2005, 08:27   #34
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Quote:
Originally Posted by robin
I would imagine that back injury or just discomfort from slamming along in chop is sometimes enough to put some people off ribbing/powerboating completely. I know I am 3 cm shorter than I was 10 years ago but thats probably just age!!!
Absolutely. I sold my RIB because of a back injury, a decision that I have regretted ever since but it went to a good set of owners I slipped a disc back in 2002, not through ribbing but really cocked it again by going out too soon afterwards. Without being melodramatic once you have a lower back injury, you are never ever the same again (oh the constant pain! ) and its certainly made me more circumspect about what I will put myself through again.

The subject of a solution to back stress/injury on fast powerboats (be they RIBS or anything else) is thus dear to my heart! The Ullman seats look like an elegant (although I suspect expensive) solution but am very interested in feedback on them. The Stidd mission seats that JK has represent the dogs danglies of suspension seating but are priced more than the value of a decent rib. Another solution I have seen referenced in the US is http://www.glyde-ryde.com which might be worth a look. Anyone with some really old back (no pun intended) issues of RIB Int. might dig out the article by a guy called Chris Hough around 1999 about the suspension bucket seats he designed and installed in a 6m Flatacraft with 150 Merc racing engine. I drove this boat and it was fantastic, think its in Scotland somewhere now. Chris developed a mark2 version of his seat (uses a motorcycle shock absorber) which is installed on his 8.1m Scorp. He lives in the US now and I do hope to get down to see him sometime and have a play in his boat. (New Orleans is a bit warmer than Canada!). I asked Chris at the time whether he was ever going to put his design into production but he felt that the engineering involved would make the price prohibitive. (Also he had a day job anyway.)

The other solution for fast powerboats much favoured in the US is standing up either using a leaning post or bolsters. http://www.bolsters.com/index.html being the mutts nuts here. The other interesting area is in shock absorbing flooring or mats. I wonder whether this is an easy and cheap thing to apply to RIBS. There are various products around such as reviewed here http://www.tackletour.com/reviewfootcush.html

It takes a lot to beat the 'ol jockey seat though for a low cost solution. I can't understand why anyone who does any serious ribbin would have one of those nasty benchseat things. Makes by backache just thinking about it!
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Old 02 March 2005, 08:37   #35
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Arc of the arse

Gentlemen,
Not wanting to make a long story boring but the movement range of the Ullman seat is mimicking the effect of the body absorbing an impact without a suspension seat. The link is parallel to the upper leg and the pivot is next to the knee. Thus as you bend your legs to mitigate the shock the arc of your arse goes down and back. Simple.

For an example of this natural motion have a look at National Hunt jockeys at full tilt. Enough of the pyhsics.

How much are the seats and where can they be purchased?

Mark
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Old 02 March 2005, 11:14   #36
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I think you must order the seats from Ullman direct :
http://php.ullmans.com/?id=0

They cost a lot, but so does a broken back. I guess they cost about 3 times a std. jockey seat.
Probably spend some 300 hours a season at sea, so if the seats works I guess it's a good investment.

Is it anyone at the forum that work on, or know anyone that work on Tornado ? I would like to have some contact with whoever that is doing the last fittings on the boat. Sendt a mail directly to factory, but no answer yet.


Regards

Roy
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Old 02 March 2005, 12:16   #37
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If you contact Laurence Lock at Barnet Marine I'm sure he will be able to put you in contact with the factory as he is the Director of Tornado Boats. His e-mail is:

info@ribs.co.uk

The web address is:

www.ribs.co.uk

Where did you order your RIB from, direct from Tornado or from Barnet Marine?
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Old 02 March 2005, 12:35   #38
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Thanks for the tip.

I ordered it from the Norwegian importer. He is also my contact to the factory, but I would like to have a direct contact with the persons that worked on my boat if that was possible.


Regards

Roy
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Old 02 March 2005, 14:00   #39
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Quote:
Originally Posted by robin
There is only one alternative......fit these instead
these are not far off ideal, with a little lateral stability through floating mechanisms you could effectively have no permenant mechanical contact with the boat..
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Old 04 March 2005, 16:38   #40
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Familiar

These look a bit familiar Rib Roy, guess this is how yours will look when installed
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