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Subject Topic: kia help
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Personmaggie51
15/3/2015 at 8:57am
 Location: manchester
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srry if link dosent work its saying mtplm 83.1% kerb 85% est towbar weight 140% extreme caution this combination is unsuitable the calculation is based on the difference between 7% of mtplm or actual laden weight and the cars towball.When I clicked on the info link it came up with the difference between the vehicle manufacturers max allowable towbar noseweight and the estimated 7% 0f caravans gross weight if this calculation exceeds 100% you should pay close attention when loading van to ensure towball is below tow vehicles hitch limit .The towbar result will often express extreme caution because this box is checking if the car noseweight meets with a desiable 7% of max loaded caravan weight but many cars will not meet this target . consensus is between van maufacturers is best stability is achieved with a 7% noseweight of the actual laden caravan also the noseweight must not exceed the car towball limit or the caravan hitch limit c> Can anyone enlighten us

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maggie


Personbilly
15/3/2015 at 9:06am
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Not really, unless you post up kerbweight of your car & max loaded weight(mtplm)of your caravan.

The text in your post is pointing out correctly that noseweight of caravan needs to be around 5-7% of weight of caravan so for a caravan weighing 1300kg noseweight needs to be between 65kg & 91kg, preferably towards the higher weight so towcar needs to have allowable download of up to 90kg.


PersonMotobiman
15/3/2015 at 9:12am
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I found during research 7 percent SVL for the majority of the bigger SA caravans rules out an awful lot of the mid size tow cars and just leaves the tanks.

Wonder if this was actually thought up by the fuel companies...


Personbilly
15/3/2015 at 9:19am
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So reading your post again it seems to suggest that while caravan is ok at less than 85% of your car kerbweight, the towbar download(ie noseweight allowance)is well under 7% of caravan max weight(mtplm)so what this means is that if caravan does give a stable tow at max towbar download for your car then caravan will need more front end weight to get noseweight up to 7% of mtplm but as this cannot be done within car towbar download limit the car may be unsuitable as a towcar.

You will not know this until you have towed the caravan though.


Personbilly
15/3/2015 at 9:22am
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Wrong again Motob. It was thought up by engineers who know their stuff.

refer back to earlier threads. Technical limits as advised by car manufacturers are not guides to safe towing, they are parameters to work within when matching car & caravan.


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PersonMotobiman
15/3/2015 at 9:24am
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The 5 to 7 percent SVL is just a suggestion and there are hundreds of outfits that don't fit into this bracket that I suspect have been used every day in complete safety.

No convinced by these argument at all.


PersonMotobiman
15/3/2015 at 9:26am
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Quote: Originally posted by Billy x on 15/3/2015Wrong again Motob. It was thought up by engineers who know their stuff.

refer back to earlier threads. Technical limits as advised by car manufacturers are not guides to safe towing, they are parameters to work within when matching car & caravan.


Wrong about what? The non mandatory part of these 'limits' or the fuel company part?


Personbilly
15/3/2015 at 9:37am
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All that matters is a safe stable tow. Look at the American way, look at Airstreams & other big Yank caravans that have to be towed by Dodge Ram & F100 Trucks, look where the the wheels are on Airstreams, see how far back? Imagine the noseweight on that, 150kg or or more? Thats how you get a stable tow.

So from that you can conclude that if a caravan needs more towing stability then increase noseweight within the reasonable sensible parameters. If the car is not designed for this then it is not a suitable towcar.

Modern cars are not designed for towing, the first consideration is saving weight to achieve low emissions so it follows that towbar mounting points can only take a certain weight even though the power & torque of modern diesels can allow a high tow weight.


Personbilly
15/3/2015 at 9:40am
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The fuel company part. The relation between noseweight & gross weight of caravan is engineering science. If it just leaves the 'tanks', then sobeit.


PersonMotobiman
15/3/2015 at 9:45am
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There are many factors that affect towing stability.

SVL is only one of them.

Setting the SVL between these limits does NOT guarantee a stable outfit and it's dangerous to concentrate on it at the exclusion of the other factors.

I wil no longer comment on these posts.


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PersonMotobiman
15/3/2015 at 9:46am
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Quote: Originally posted by Billy x on 15/3/2015
The fuel company part. The relation between noseweight & gross weight of caravan is engineering science. If it just leaves the 'tanks', then sobeit.


That was tongue in cheek, lighten up man.


Personbilly
15/3/2015 at 10:03am
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All factors come into it obviously. Its taken as a given that tyres pressures must be correct & so on but if everything else is correct then there needs to be potential to increase noseweight if that is necessary.


Personmaggie51
15/3/2015 at 10:05am
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I thought our caravan noseweight was far too heavy for the van but its saying extreme caution then this is only a guideline that's whats confusing us

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maggie


Personmaggie51
15/3/2015 at 10:08am
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noseweight of car according to tow safe is 75 estimated noseweight of caravan is 105 kerbweight of car is 1758 max weight of caravan mtplm is 1495 hope this helps

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maggie


Personbilly
15/3/2015 at 12:24pm
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Max noseweight for your car is only 5% of caravan weight so you have to hope for a stable tow at that weight, it may not be enough, you can't tell unless you tow it. As you will be at max allowable towbar download weight for the car you have no scope to increase caravan noseweight should it wobble. It may even be difficult to get noseweight of caravan down to 75kg unless you load a fair bit at the rear of caravan which is not really a good idea.

Post last edited on 15/03/2015 12:38:20


Personmaggie51
15/3/2015 at 8:03pm
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so doesthat mean it will be no good for our car shouldwe take it off the seasonal pitch

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maggie



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