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Old 20 April 2008, 10:51   #11
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Country: UK - England
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Boat name: The Bandit &
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Originally Posted by paul holder View Post
How Heavy Is The Boat
How Heavy Is The Trailer
How Many Sets Of Brakes On The Trailer
What Make The Brakes Funcion
How Heavy Is The Tow Car
All The Above May Mean Moving From A Mormal Type Trailer To A Commersial .
Boat 10m long weight 2400 kg approx
Trailer has twin 1500kg axles at present hitch 2600kg will upgrade to 3500kg hitch
Each axle has brakes
Range Rover or American 4x4

The advantage going triple means just adding a third axle without having to cut of the old axles as there welded
The trailer has a double frame
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Old 20 April 2008, 16:57   #12
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...The advantage going triple means just adding a third axle without having to cut of the old axles as there welded...
I doesn't work like that. You will still need to move the axles. If your present rig is properly balanced, putting a third axle in front of the others will pretty much remove your nose weight because the front axle will then support the front section of the trailer. To counter this, all three axles will need to be moved rearward or the boat be moved forward.
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Old 20 April 2008, 17:20   #13
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I doesn't work like that. You will still need to move the axles. If your present rig is properly balanced, putting a third axle in front of the others will pretty much remove your nose weight because the front axle will then support the front section of the trailer. To counter this, all three axles will need to be moved rearward or the boat be moved forward.
At the moment there are no engines in the boat 1100kg is going in the engine bay thats why i hoped a third would mean we wouldn't have to move the original pair
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Old 20 April 2008, 17:22   #14
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So the third axle is to go at the back?
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Old 20 April 2008, 17:52   #15
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So the third axle is to go at the back?
thats the idea. when we put the engines in the bow flys up. Hoping that the third will balance it
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Old 21 April 2008, 01:46   #16
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I would think that you wil still need to move the axles to get the best setup so I'd

1/ get three new axles on a frame so i could slide them along the trailer to get the best setup (cost of the boat to cost of new axles etc)

2/ use a hiab lorry if your not going to tow it very much, would save alot of problems
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Old 22 April 2008, 04:58   #17
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axle

The first thing we have to ascertain is the nose weight of the trailer hitch, this should be in the order of 5-10kg. Can be slightly more but certainly no less.
When you place your new engines into their compartment this will send the nose skywards, therefore, before the engines are installed place a 4" x 4" billet of timber between the two rear trailer sections. Place two billets upwright under this. To the side of these billets have two trolly jacks, one either side. Install your new axle but use U bolts which will, therefore, give you flexibility in movement backwards and forwards. Install your engine and the nose should not move. Pump up your trolly jacks, remove the upwright timber, let the trolly jacks down slowly so that the new engine weight is now on the rear axle. Check your nose weight. Simple bathroom scales will do.
Pump up trolly jacks again, move axle until you have the correct nose weight. Tighten up U bolts, weld in place, remove timbers and away you go.
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Old 22 April 2008, 05:14   #18
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I'm with bedajim, the adjustable subframe sounds like a good idea. Judging from the picture, I think the axles an/or the boat have to be moved.
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Old 22 April 2008, 09:10   #19
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We have a triple axle de Graff trailer for our 9m and have had no problems with it at the time of purchase de Graff seemed to be the only company willing to supply a triple axle trailer
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Old 22 April 2008, 18:38   #20
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Thanks for you answers guys.

We are adding a console and a 1000 litre fuel tank which sits just in front of the first axle so hoping that we won't have to move the front 2

Having searched various boat galleries it appears triple axle trailers arnt that rare
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