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Old 11 October 2007, 08:48   #11
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Thanks samt. do you find the boat bouncy. do you sit on the sponsons or have you a bench that sits accross the tubes
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Old 11 October 2007, 09:09   #12
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I sit on the sponsons, the boat originally had a bucket seat arangement, and covered bow. Sitting on the sponsons is fine, providing you have somthing strong to hold onto.

I haven't found the Rib bouncy, but I havn't used it much so far, there are loads of other members with more experience with SR4's. I believe the searider has quite a deep V compared to alot of other similar sized ribs so provides a much smoother ride.
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Old 11 October 2007, 09:34   #13
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When discussing the ride characteristics of a SIB it is important to distinguish if you are describing one with the traditional inflatable V keel (95% of the SIBs out there), or a cat hull or a hybrid of the 2.

Zodiac's futura hull is a hybrid in that it has both a central inflatable v keel along with 2 small speed tubes. The speed tubes create lift which makes this hull much quicker and more efficient than the traditional SIB hulls. It will also reduce the bounciness of the boat somewhat.

The cat hulled SIBs would include the pencil boat style racers zapcats/thundercats & the thunderbolt (Ceasars 5.3m version of a thundercat). It would also include the round nosed cat hulls, Gemini's Surf (4.0m 4.2m) series & Dive (4.7m 5.3m) series, and Ceasar's Surfcat. For general use where you will carry a fair bit of gear/people and want a dry ride, I'd stick with the round nosed hull. For longevity I'd choose hypalon over PVC.

The true cat hulled SIBs with their much larger highjackers and no central keel will provide a far much smoother and drier ride in choppy conditions than the hybrid design since the highjackers are able to deflect and dissipate a tremendous amount of energy away from the main sponsons on landings. The pictures below show the difference between a 4.2m futura hull (left) and that of a 4.2m Gemini Surf.
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Old 11 October 2007, 13:13   #14
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thanks to all contributors to this thread as I was thinking of getting a SIB but having found the Med too choppy for a 5m RIB, would find it even worse in a SIB.

The SIB benefits seemed just too good to be true - easy launch, store in the back of car, no trailer, small ob, can row out of trouble, cheap to buy & maintain etc etc. However, out of 20 outings this summer there were only 2 flat water days so the SIB would not really have suited.

Saying that it is also a confidence thing, some days when we were out & found it choppy (say 5 ft waves but felt like more) we saw a SIB out there & the occupants looked q happy.

Thanks all, interesting posts
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Old 11 October 2007, 14:36   #15
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I have an old 5m Humber inflatable I use for diving.

Advantages:
Easy to tow, I used a Ford Fusion 1.4 tdci and you wouldn't even know it was on the back.
Easy to launch/retrieve.
Lots of deck space as it has a 40hp tiller steer.
Great for diving the Lochs up here.

Disadvantages:
Seaworthiness, was out it a brisk sea earlier this year going from Oban to the Sound of Mull across the Firth of Lorne and we got buffeted quite a bit by some biggish waves, we got there and back OK, just took a bit longer and my biceps grew in size trying to keep the boat going straight in a strong breeze.

I'll be upgrading to a RIB next year as I'm looking for something that will take me a bit further offshore.



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Old 11 October 2007, 14:39   #16
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Quote:
Originally Posted by RibinSpain View Post
thanks to all contributors to this thread as I was thinking of getting a SIB but having found the Med too choppy for a 5m RIB, would find it even worse in a SIB.

The SIB benefits seemed just too good to be true - easy launch, store in the back of car, no trailer, small ob, can row out of trouble, cheap to buy & maintain etc etc. However, out of 20 outings this summer there were only 2 flat water days so the SIB would not really have suited.

Saying that it is also a confidence thing, some days when we were out & found it choppy (say 5 ft waves but felt like more) we saw a SIB out there & the occupants looked q happy.

Thanks all, interesting posts
The sib is worse in a small chop , its actually a lot of fun in big rolling sea when the wave faces are big enough to get the whole boat on .

That surfacat looks way better than the futura hull the way it sits on the water .I think that would be my choice as it takes a short shaft motor.
having now owned and used the futura its really not much better than the air floor Honda , its really only gaining anything because its longer and I don't really like the flat cornering it feels far less secure and you back off sooner for fear of falling out .

I would bet the Honda 4m with an alloy floor is an equal to the Futura for half the price
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Old 15 October 2007, 04:37   #17
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Tiller steer SR4

I had a bit of experience with one of these and a Yam 30 a few years ago. The best way I found to "wedge" myself in was to sit against the inside of the port toob, wedging my foot against the stbd transom brace, and hanging onto the "recovery rope" with the hand I wasn't driving with. Granted that engine had the "new" (eek - was it that long ago??? ) centre positioned gearshift. An older engine with the traditional "shift on the stbd side" might need you to sit to stbd for close quarters manoevering. Memory says that engine also had a tiller that pointed vaguely to port as well, which made a stbd sit very uncomfortable, but put it right where you wanted it on the port side.

Once wedged in like that I bounced through all sorts of evil chop quite happily. Needless to say we lashed the fuel tank up at the bow to get some more weight forward.......
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