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Old 21 September 2009, 08:32   #11
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Thanks Chris,

What would the total weight of one of these boats when fully kitted (sans personnel) be?
hi p/t, the older D class with the 40 hp engine on excluding crew weighs in at 338 kgs or 745 ibs,, not too sure about the new version with the pod as it now has a bigger 50 hp engine too ,
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Old 21 September 2009, 08:52   #12
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Obviously not a SIB that will roll up & fit into the trunk (boot) of a car!


With these SIBs fully decked out, the difference in weight between it and a similarly equipped RIB of the same length would probably be relatively small. Why a SIB rather than a RIB? I can think of a few possible reasons, but would be interested to hear from you ILB guys about this.
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Old 21 September 2009, 09:34   #13
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hi p/t just phoned up the i.l.b main base where they are built and spoke to the top man and he says the latest i.l.b D class weighs in at 443 kgs- 50 hp engine ,fully fuelled and ready to go ex crew ,the floor board is now a composite honey comb as is the transom sheathed in g.r.p instead of one piece ply wood which makes it lighter ,couple of reasons the rnli have still kept to s.i.b.s for the smaller inshore lifeboat is flexibility,, lol,, inflatable keel can be deflated for really shallow water and less damage to keel if constantly bumping into rocks ,,,,ps ive had an old one in my car with the board on the roof,, just ,mart
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Old 21 September 2009, 09:45   #14
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Thanks Mart. That makes total sense. That is why I specifically wanted a SIB rather than a RIB. The hull of a RIB (fiberglass or aluminum) would get irreparably damaged if it were run up some of the rapids that I've taken my SIB up. If I were to do anything different, I would have gone with the 5.3m version of my boat rather than the 4.7m version, just for that extra bit of space in case I need it, but have no complaints about what I currently have.
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Old 21 September 2009, 14:14   #15
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As Mart says, the D class is great for getting in and out of awkward places (shallow water and surf). There are some better images about, but here are some of the best I can find at the mo:

http://www.rnli.org.uk/who_we_are/pr...g=South%20West

http://www.rnli.org.uk/who_we_are/pr...video&listing=

http://www.rnli.org.uk/who_we_are/pr...ting=Lifeboats

http://www.rnli.org.uk/who_we_are/pr...ting=Lifeboats

Cheers

Chris
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Old 21 September 2009, 15:11   #16
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So what the heck is the RNLI doing running their boat in the surf right next to surfers? Maybe in the case of a rescue, but for training purposes that is an unnecessary risk. (see the second link on the previous post) I have to stay a hundred feet away from surfers and swimmers and that seems reasonable to me.

So the front attachment points for the lifting bridal go to the floor? Is this a one piece floor? Is it attached to the tubes by more than compression from the tubes? Zodiac advises that all lifting points should be on the tubes or transom rather than the floor. I don't necessarily trust the glued on d rings and would appreciate any advise regarding attachment to the floor.
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Old 21 September 2009, 16:33   #17
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So what the heck is the RNLI doing running their boat in the surf right next to surfers? Maybe in the case of a rescue, but for training purposes that is an unnecessary risk. (see the second link on the previous post) I have to stay a hundred feet away from surfers and swimmers and that seems reasonable to me.

So the front attachment points for the lifting bridal go to the floor? Is this a one piece floor? Is it attached to the tubes by more than compression from the tubes? Zodiac advises that all lifting points should be on the tubes or transom rather than the floor. I don't necessarily trust the glued on d rings and would appreciate any advise regarding attachment to the floor.
must admit it looked a bit close ,,,yep the lifting eyes made from bronze are bolted through on the one piece floor with a back plate ,rnli stopped using multi boards within the first few months of using inflatables in the early 1960s as in big waves they either broke/ cracked / popped out of posistion they are not held in except by the sponsons, they were tightened by bottle /turn screws so doing away with thrust boards,,ill take a pic of the lifting eye bolts tommorow of my y class which is just a smaller version of the d though there may be one on rib net that i posted a while back , ,mart
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Old 22 September 2009, 04:47   #18
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pic of bronze lifting eye /pad/backing plate,,,,,yeah i know they need a clean ,lol
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Old 22 September 2009, 11:17   #19
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Thank you for the follow up post. The rnli boat definitely has me thinking about how I have my lifting bridal set up. Zodiac recommends the exterior lifting points on the tubes because the floor could conceivably come out from between the tubes. But I can see that a well fitted floor on fully inflated boat isn't likely to go anywhere and is probably a more reliable lift point than a d ring on the tube. Certainly I load a lot of weight into my boat and the strain on the the fabric floor and tubes can't be a good thing. What really concerns me is the possibility of having a glued on d ring release. I have a straight sling strap that I run from the shackles and d rings on the sides under the boat just to cover such an possibility, but it is a pain to install and remove when not on the lift. Switching to inner attachment points on the floor with maybe an extra strap to one of my inner d rings would definitely be more supportive of the load and just as well restrained as the exterior attachment point. Having a tube slip down wouldn't be as catastrophic as losing a d ring attachment point. Though my aluminum floor isn't one piece it is definitely rigid and strong. I think I will give it a try and see how the floor sections handle the load. Thanks for posting the images! Here is a shot of my first lift test, before I added backing plates on my transom. Interestingly enough lifts around here require made in USA shackles since so many Chinese shackles are over rated due to poor manufacturing standards.
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Old 22 September 2009, 11:51   #20
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So what the heck is the RNLI doing running their boat in the surf right next to surfers?
That was quite close, the guy just pops up from under the engine!
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