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12 September 2012, 05:14
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#41
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RIBnet supporter
Country: UK - England
Town: Rutland
Length: no boat
Join Date: May 2006
Posts: 2,500
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Quote:
Originally Posted by Anchorhandler
Ahh but at least i dont need to worry about going under bridges with it sat on my trailer....
Long time no speak Jim, trust your doing well?
Simon
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Very thanks even had time to use the new boat with new crew member
Jim
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12 September 2012, 05:24
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#42
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,176
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Quote:
Originally Posted by willk
Oh yeah, he's good. SR4 - eat yer heart out. Those planning a fishing expedition should check if they are the Fisher or the Fishee
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I refer the honourable gentleman to the answer I gave earlier
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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12 September 2012, 07:31
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#43
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Member
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
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Quote:
Originally Posted by jeepster
1100kg is the maximum point load the axle can take but dont forget that the weight of the boat is not a point load, it is distributed along the length of the trailer
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Yes, as long as you take out the word "point". I'm sure you're not suggesting that the axle can accommodate an infinite number of 1100kg point loads?
Quote:
Originally Posted by jeepster
the trailer can have a gross weight of more than the axles maximum capacity.
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No.
There are three elements to the mechanics of this discussion ... the boat, the steel fabrication (the "trailer chassis" you made yourself) and the axle that you rescued from a caravan.
Think it through ... you're quite right to say that the boat is not a point load on the "trailer" - as long as by "trailer" you mean the "trailer chassis" - but, the "trailer chassis" is most definitely a point load on the axle (well, two points loads actually). Not that that matters anyhow ... 1100kg capacity means 1100kg capacity regardless of how it's distributed or how you phrase it.
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12 September 2012, 12:23
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#44
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Member
Country: UK - England
Town: London
Boat name: Jeepster
Make: Marina 16 GT
Length: 5m +
Engine: Outboard, Petrol, 30
Join Date: Sep 2012
Posts: 52
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Quote:
Originally Posted by Leapy
Yes, as long as you take out the word "point". I'm sure you're not suggesting that the axle can accommodate an infinite number of 1100kg point loads?
No.
There are three elements to the mechanics of this discussion ... the boat, the steel fabrication (the "trailer chassis" you made yourself) and the axle that you rescued from a caravan.
Think it through ... you're quite right to say that the boat is not a point load on the "trailer" - as long as by "trailer" you mean the "trailer chassis" - but, the "trailer chassis" is most definitely a point load on the axle (well, two points loads actually). Not that that matters anyhow ... 1100kg capacity means 1100kg capacity regardless of how it's distributed or how you phrase it.
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Its all about load distribution...If you dont understand how it works, as an example take a 2 axle 18 tonne lorry (I have an HGV2 licence so this stuff is my bread and butter)...Its U/W is typically about 10 tonnes and its maximum gross weight is 18 tonnes, so it has a maximum payload of 8 tonnes.
Note that even when fully loaded, at no point is there ever an 18 tonne load on either axle, despite the lorry actually weighing 18 tonnes when fully loaded, because the load is distributed, not a point load.
Typically the 18 tonne deadweight is split into an axle point load of about 40% on the front axle and 60% on the rear axle. Note that neither axle is able is take an 18 tonne point load directly though.
On a single axle trailer with a distributed load the maximum gross weight can also exceed the capacity of the axle, because the load becomes split between the weight on the hitch (the nose or tongue weight) and the axle. If your driving a 4x4 your towhitch can probably accomodate a 100kg nose weight comfortably so lets assume your towing a fully loaded single axle trailer with a 100kg nose weight and an 1100kg capacity axle...100+1100 gives a trailer with a maximum gross weight of 1200kg, more than the capacity of the axle!
I admit its not a large amount of weight difference but it is a difference.
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12 September 2012, 13:12
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#45
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Member
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
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Quote:
Originally Posted by jeepster
Its all about load distribution...If you dont understand how it works...
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1100kg axle, 100kg nose weight, 1300kg rating ... yep, I don't understand.
I understand mechanics and load distributions though - I too have a day job.
Good luck with the trailer
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12 September 2012, 13:24
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#46
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Member
Country: France
Town: Huisnes sur Mer
Boat name: Raufoss
Make: Avon
Length: 4m +
Engine: Mercury 50
Join Date: Sep 2010
Posts: 789
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Quote:
Originally Posted by Leapy
1100kg axle, 100kg nose weight, 1300kg rating ... yep, I don't understand.
I understand mechanics and load distributions though - I too have a day job.
Good luck with the trailer
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What dont you understand Leapy?.....we should all base our trailer loading calculations on the fact that 200kg's worth of nose weight is acceptable..
Simon
__________________
C'est pas l'homme qui prend la mer, c'est la mer qui prend l'homme....
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12 September 2012, 13:32
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#47
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Quote:
Originally Posted by jeepster
I have an HGV2 licence
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Quote:
Originally Posted by jeepster
I have been unemployed for over a year now
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Did you overload your lorry?
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12 September 2012, 13:39
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#48
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Member
Country: UK - England
Town: NW& wherever the boat is!
Boat name: depends on m'mood!
Make: Humbers/15-24m cats
Length: 6m +
Engine: etec130/big volvos
MMSI: many and various
Join Date: Nov 2001
Posts: 1,816
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get out there and use the outfit lad before the weather becomes even more unpleasant, and then let us all know how ya got on. A boat is for using not for arguing about on here. Don't forget to lock the trailer though before someone takes a fancy to it whilst you're swilling about at sea.
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12 September 2012, 13:54
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#49
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Member
Country: UK - Scotland
Town: Paisley
Boat name: Don't know yet...
Make: Arctic 22
Length: 6m +
Engine: 2x 150 etecs
Join Date: Aug 2009
Posts: 103
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Erm, so does that mean that my twin axle trailer which is fitted with a pair of 1500kg axles can have a total weight of more than 3000kg? I reckon it should be good for at least 5000kg if i put lots of rollers on to spread the load........ ;-)
Each axle has a maximum weight that it can carry. The total of these weights when added often gives a greater mass than what is allowed.
For example,
I drive an 02 plate defender, front axle is 1580 and rear axle is 2200 giving a total of 3780kg yet the maximum gvw (gross vehicle weight) is only 3500kg.
If I exceed 1580kg on the front axle or 2200kg on the rear axle I am overloaded even though I may weigh less than 3500kg in total.
Equally if I weigh more than 3500kg in total I am also overloaded.
The total gtw (gross train weight) for the vehicle is 7000kg. This allows a 3500kg trailer to be towed.
My trailer has two 1500kg axles giving a total of 3000kg gross.
If either axle exceeds 1500kg I am overloaded even if my total is under 3000kg. If I go over 3000kg total then I am also overloaded.
A single axle trailer that has an 1100kg axle can not have a gross weight more than 1100kg or you are overloaded.
Also the gross weight of the trailer cannot exceed the towing weight of the car which is on the plate under your bonnet. If your car can only tow 750kg and you tow a trailer more than that then you are overloaded.
No matter how you look at it or want to try and justify it, your trailer has a maximum total weight of 1100kgs.
My suggestion is find a local weigh bridge and check your total axle weights. Much easier and cheaper than having VOSA do it for you.
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12 September 2012, 14:05
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#50
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,903
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Anyone considering getting into complex debates with our new member might find it helpful to do some supplementary reading first.
Linky
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12 September 2012, 19:18
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#51
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Member
Country: UK - England
Town: Wakefield
Boat name: Bouncer
Make: Redbay Stormforce
Length: 6m +
Engine: 2x Honda 100 Hp
MMSI: 235025718
Join Date: Jun 2009
Posts: 4,177
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13 September 2012, 01:28
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#52
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Member
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,726
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Quote:
Originally Posted by willk
Anyone considering getting into complex debates with our new member might find it helpful to do some supplementary reading first.
Linky
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Linky no worky?
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...
Sent from my Computer, using a keyboard and mouse
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13 September 2012, 05:10
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#53
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Member
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
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Quote:
Originally Posted by BogMonster
Linky no worky?
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It did at first but then it dropped out. Must have been overloaded
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13 September 2012, 07:40
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#54
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Member
Country: France
Town: Huisnes sur Mer
Boat name: Raufoss
Make: Avon
Length: 4m +
Engine: Mercury 50
Join Date: Sep 2010
Posts: 789
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Quote:
Originally Posted by Leapy
It did at first but then it dropped out. Must have been overloaded
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Yeah, thats a shame its no longer working, there were some great quotes in there.... Im sure we would have all benefited from His vast experience... :-)
Simon
Sent from my iPhone using Rib.net
__________________
C'est pas l'homme qui prend la mer, c'est la mer qui prend l'homme....
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13 September 2012, 21:57
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#55
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Member
Country: UK - England
Town: London
Boat name: Jeepster
Make: Marina 16 GT
Length: 5m +
Engine: Outboard, Petrol, 30
Join Date: Sep 2012
Posts: 52
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I went to my local council tip to use their weighbridge today.
I was shocked to find that the boat and trailer combo weighed 910kg!!!...AAAAAAAARRRRGH!!!!!
My car can only tow 750kg, which is currently what jeepster must weigh on its own!
So it means unless I can get jeepster to go on a crash diet and lose at least 150kg I can't legally tow her at all!
It might be possible because she is right lardy ass at the moment...Apparently the boat was orginally designed to take a 50hp max but the guy I bought it off said it used to have a 90hp on the back! To allow it to do this safely the transom is heavily reinforced with steel beams. The one in the splashwell is 100x100x10 steel angle over a metre long...That weighs 15kg per metre so I could get rid of that and save about 20kg straight away...There is even heavier looking stuff inside the transom under the splashwell. The U/W of the trailer is currently about 150kg but by drilling largish holes at regular intervals along the sides of the side rails and I frame members I could probably lose 50kg there whilst keeping it just as stiff as before. The only other option is to fit a towbar to my ex's Ford Focus 1.8 TD and borrow that when I want to use the boat because that can tow 1200kg.
And no, she wont swap cars with me permanently..Dont even go there!
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13 September 2012, 22:01
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#56
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Have you considered getting a mooring?
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13 September 2012, 23:10
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#57
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Member
Country: UK - England
Town: Todmorden
Boat name: Twentyfourseven
Make: Zodiac 550 pro open
Length: 5m +
Engine: Suzuki DF 90
MMSI: 235095113
Join Date: Jul 2011
Posts: 56
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Get drilling that trailer, sounds like a right idea!! NOT!!! Boats full of wind arn't a bad idea after all !!
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13 September 2012, 23:18
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#58
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,903
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Could you not have kept the 150kg on the tow hitch where it doesn't count?
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13 September 2012, 23:46
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#59
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Member
Country: France
Town: Huisnes sur Mer
Boat name: Raufoss
Make: Avon
Length: 4m +
Engine: Mercury 50
Join Date: Sep 2010
Posts: 789
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Even without drilling holes in the fecking side rails that rectangular section tube is probably just on its strength limits and you want to go and weaken it even more!... Think about it, at the moment you have nearly a quarter of a ton bouncing up and down a meter or so either side of the fulcrum ( the axle) ... !!!
Honestly, stand at the back of the trailer and look down the length of those side rails and tell me there not significantly bending under the weight.... When i say significantly i mean anything more than a10mm deflection down its length.
If you let me know exactly what the rails dimensions are and what distance from the axle mounts the swing beams connect to them, l will work out how much weight you put though it....better safe than sorry..
Simon
Sent from my iPhone using Rib.net
__________________
C'est pas l'homme qui prend la mer, c'est la mer qui prend l'homme....
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14 September 2012, 08:31
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#60
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RIBnet admin team
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: Tohatsu 30HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 11,629
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Quote:
Originally Posted by jeepster
I was shocked to find that the boat and trailer combo weighed 910kg!!!.--- My car can only tow 750kg, ---- lose at least 150kg I can't legally tow her
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maths still not your strong point?
Quote:
The U/W of the trailer is currently about 150kg but by drilling largish holes at regular intervals along the sides of the side rails and I frame members I could probably lose 50kg there
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have you actually worked out how big and close together the wholes would need to be to loose 50 kg? Common sense says that is 1/3rd of the weight, but your weight includes the axel, the hitch and the wheels; so probably more like half the mass of the rails/beams.
Quote:
whilst keeping it just less as stiff as before. The only other option is to fit a towbar to my ex's Ford Focus 1.8 TD and borrow that when I want to use the boat because that can tow 1200kg.
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which will need to be braked. What is your tow car that can only tow 750kg, but can tow this unbaked?
Quote:
Originally Posted by Downhilldai
Have you considered getting a mooring?
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Any suggestions what he could use as a home made sinker?
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