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Old 11 May 2015, 15:53   #1
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Country: UK - England
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How should bombard sit on a trailer?

Just purchased a new carpeted bunk trailer for my bombard 380 and need advice on the correct set up please.

Should the bunks be positioned under tubes or under the boat more where floor meets the tubes?

I appreciate any advice from you experts.

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Old 11 May 2015, 18:23   #2
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I don't think having them on the tube/floor transition is a good idea. I'd want much longer bunks to support the length of each tube.
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Old 11 May 2015, 19:25   #3
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Thanks for your reply.. so do you mean that the bunks should sit flat under the tubes as much length of the tubes as possible?

The trailer is adjustable so I can ensure the tubes are well supported and will sit flat on top of the bunks.

I thought I read somewhere that the bunks should sit in the groove of where the floor meets the tubes but I'm new to this and wasn't sure!

Thank you.
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Old 12 May 2015, 02:15   #4
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just setting up a sib trailer defo what max has said personally i like a bunk under the keel too.
could i ask what you think of the aerotec's build quality etc i was looking to buy a bombard c3 but the weight of the areotec is less than half of the c3
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Old 12 May 2015, 02:32   #5
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Hi. Having the bunks supporting the area where floor meets tube is something I have heard a few times. I've got a bunked trailer but the bunks are much wider than yours so the tubes sit on the bunks. This does allow the boat to bounce a bit when trailering so contact with a more solid area is probably a better setup.

I would say that with your set up as the bunks are narrow adjust the bunks so they sit in the area where the floor meets the tubes. Unless you make them wider I don't think they are wide enough to give enough support if you position them under the tubes. Just out of interest does the trailer have a transom support?
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Old 12 May 2015, 02:36   #6
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Sorry I've just seen in the photo you have a transom support.
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Old 12 May 2015, 02:50   #7
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It depends if you are transporting with the engine on I guess as to how important this is (without the engine there is very little weight there) but putting stress on the point where the floor and tubes join is not a good idea on a SIB I think. Best to support the floor and tubes with long angled bunks as well as the 'keel'. If carrying with the engine on I would definitely want a support under this too on a SIB.

Re' build quality - IME the Aerotec is very well made and certainly superior to the regular Zodiac SIBs (ie 3.4m Fastroller etc), there seem to be less reports of glue failures too after 10 years or so.
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Old 12 May 2015, 02:56   #8
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Pic of a trailer here I had.
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Old 12 May 2015, 11:23   #9
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Quote:
Originally Posted by Max... View Post
I don't think having them on the tube/floor transition is a good idea. I'd want much longer bunks to support the length of each tube.
Disagree (with the former point.) I think the best spot would be right there - that's where the floor edges are in contact with the fabric bottom, so you get solid support without stretching the floor material. At the floor/tube join, you are supporting the only rigid part of the structure (aside from the transom, which should also be supported); having the bunks further out means the tubes have be solidly inflated to hold the boat up (which would not be ideal if you have a burst tube but still need to get the boat home.)

As far as the length, most of the weight will be towards the back (usually), so that's where you need the support.

On my SIB, the bunks ran from the back, about 3/4 of the way forward, and extended several inches behind the transom. A single center bunk at about 1/3 back supported the keel, and a bow stop (basically a bunk mounted upright) located the front of the boat at the winch post.

jky
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Old 12 May 2015, 13:42   #10
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How should bombard sit on a trailer?

I would also agree with jyasaki.
Bunk support on floor right next to tubes, angled to floor profile, and extending under to support transom. Would keep keel clear of any cross supports. Not too worried about bunk length as long as min. 2/3rds boat length. Ideally tubes and floor should only be inflated to say half pressure when out of water/towing to allow for pressure increase in sunlight/high temps (we should be so lucky). More important to support transom and floor interface especially if outboard mounted - tubes are light and will support themselves. This configuration will also help centre boat on recovery from water if applicable.

Nice trailer by the way!!
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