Forum - RE: Triton 430 dimensions question

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Triton 430 dimensions question

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#16

RE: Triton 430 dimensions question

in Anything Eriba-related Wed Mar 09, 2016 8:38 am
by Deeps (deleted)

Quote: Aaron Calder wrote in post #12
That's interesting. I wonder why the maximum towbar weight has been increased by 33% on the newer models? Is that with the standard 1000Kg or uprated 1200Kg axle I wonder?

Page 34 of the English version of the Touring handbook 05/12-1:-

The payload in the caravan must be distributed in such a way that the measured nose weight comes as close as possible to the maximum permissible nose weight. The maximum permissible nose weight is not to be exceeded.

Yes, our Triton 430 has been uprated to 1200kg and the maximum permissible noseweight of 100kg is stated in the vans registration document which of course in the UK you don't have. I'm sure it must also be stamped somewhere on the frame but I've never gone scrabbling around underneath looking for it LOL.

Edit: thanks for the PDF link Pep - very informative.

2013 Triton 430, Mazda CX-5 D-150, AWD AT, Walker Touring Plus awning, Isabella Shadow sun shade.

Last edited Wed Mar 09, 2016 8:41 am | Scroll up

#17

RE: Triton 430 dimensions question

in Anything Eriba-related Wed Mar 09, 2016 9:50 am
by Aaron Calder •

| 3.834 Posts

The maximum noseweight on my 2003 420 Triton is marked on a sticker attached to the drawbar fairing.

Although the label has worn over the years, the 75Kg marking can clearly be seen at the bottom left of the picture. If you enlarge the picture fully (EDIT: you can't do this with addpics pictures), you can make out '25Kg' in the German text which I presume indicates the minimum permissible noseweight. I'm surprised that the newer models no longer have a warning/advisory sticker attached as it is a conveniently located safety reminder that is difficult to overlook.

On the face of it seems to make sense that similar sized vans with different interior layouts should have different noseweights. The 420 has quite a bit of storage space at the front end where the kitchen is located while the 430, because of the dinette, has more towards its rear. Could the placement of the weight influence the extent to which the nose of the caravan will tend to rise during towing?

However, due to the different layouts it will be harder to achieve a noseweight of 85-100Kg in a 430 with less front end storage than 75Kg in a 420 with lots? Also, if the caravan is correctly balanced, why would towing affect the noseweights differently anyway?

I'm now very confused. Is there anyone out there with a Physics degree who can explain this in simple terms as I'm sure I' must be missing something blindingly obvious?

Forum Administrator
2003 Triton 420 and Audi A4 2.0Tfsi S-line SE Cabriolet

Last edited Fri Aug 04, 2017 11:11 pm | Scroll up

#18

RE: Triton 430 dimensions question

in Anything Eriba-related Wed Mar 09, 2016 10:53 am
by hob (deleted)

Quote: Aaron Calder wrote in post #17

On the face of it seems to make sense that similar sized vans with different interior layouts should have different noseweights. The 420 has quite a bit of storage space at the front end where the kitchen is located while the 430, because of the dinette, has more towards its rear. Could the placement of the weight influence the extent to which the nose of the caravan will tend to rise during towing?

I would add the comment here that the main difference between the 420 and the 430 is the location of the kitchen, front on the 420 mid section nearer the axle on the 430 giving the 420 more weight at the front.

Quote: Aaron Calder wrote in post #17

However, due to the different layouts it will be harder to achieve a noseweight of 85-100Kg in a 430 with less front end storage than 75Kg in a 420 with lots? Also, if the caravan is correctly balanced, why would towing affect the noseweights differently anyway?

I'm now very confused. Is there anyone out there with a Physics degree who can explain this in simple terms as I'm sure I' must be missing something blindingly obvious?

When moving forwards the van and towing vehicle push a big hole in the air, the displaced air has to go somewhere, some goes over or round the outfit and some goes under, the faster you go the more air displaced.
The air that goes under gives lift as its at higher pressure than the normal atmospheric pressure, the faster you go the more the lift. I don't know much about aerodynamics but I think thats what happens.

Speculation,............. if loaded similarly and balanced similarly they should behave the same?

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Vauxhall Insignia Sri 1.8 petrol 2015 towing 2006 Triton 430 import

Pep� Le Pew likes this post!

#19

RE: Triton 430 dimensions question

in Anything Eriba-related Wed Mar 09, 2016 11:08 am
by Pepé Le Pew •

| 2.752 Posts

Quote: hob wrote in post #18

The air that goes under gives lift as its at higher pressure than the normal atmospheric pressure, the faster you go the more the lift. I don't know much about aerodynamics but I think thats what happens.

In the example of an aerofoil (an aircraft wing), the air travelling over the curved upper surface has to travel further and therefore faster than that passing underneath.

The result is a lower pressure over the top of the wing than below, and that's what generates the lift.

I would guess that there is a similar kind of thing going on with the caravan, albeit in a much cruder form. It certainly happens with cars, hence the use of inverted aerofoils (spoilers) on racing cars.

.

yy-R56kh

Last edited Wed Mar 09, 2016 11:45 am | Scroll up

#20

RE: Triton 430 dimensions question

in Anything Eriba-related Wed Mar 09, 2016 5:27 pm
by Ribski •

| 1.468 Posts

Quote: Pep� Le Pew wrote in post #10
Quote: Deeps wrote in post #9
...the forward bulkhead working lose. Yes it is spelt with a single 'o' - I checked with Google.
Gogle is wrong.

It's loose.

.

Gogle IS wrong - probably 'bl--dy American' ! Collins English Dictionary confirms that in this context 'to work loose' is correct - if ,however you 'lose' the table, then a single 'o' is correct

#21

RE: Triton 430 dimensions question

in Anything Eriba-related Fri Mar 11, 2016 3:54 pm
by Deeps (deleted)

Thanks for all the replies - my question got well and truly answered didn't it. Oh, and regards the spelling. I of course knew the correct spelling, but put the reference to Google to raise a smile and then went and missed an 'o' out through lack of concentration.

As regards the aerodynamics which later crept into the post - I personally would think that the type of tow car used would have a big part to play in any uplift force applied to the caravan hitch because it's the vehicle that is creating the hole in the air to start off with. Those whose tow car has a pretty squared-off tailgate e.g. Randa and their VW Touran, will have first hand experience of the amount of uplift force that is created behind this car as on a rainy day it's the back end that really sucks up the water and dirt from the road. I washed my own CX-5 a couple of days ago and whilst the front and sides were still relatively clean, the back was covered in road salt and goodness knows what. It would seem to make sense, therefore, that a certain amount of this uplift would be forced under the vans hitch due to it's close proximity whilst the relative bulk of any large car would tend to shield the front of the van from any direct force.

2013 Triton 430, Mazda CX-5 D-150, AWD AT, Walker Touring Plus awning, Isabella Shadow sun shade.

#22

RE: Triton 430 dimensions question

in Anything Eriba-related Fri Mar 11, 2016 5:18 pm
by Randa france •

| 13.258 Posts

You might not believe this, but that is the very word that blew away what little confidence I ever had with spelling.

Many moons ago as a young trainee draughtsman I would spend days creating double elephant sized manufacturing drawings of complicated engineering designs for building utilities.

One of the hundreds of instructions on one of the drawings was to send a number of cleats to site "loose". I left out an "o" and it therefore read "lose". The next day while discussing something on the shop floor I spotted the print of my immaculate drawing with a thick red biro circle around that instruction and in scruffy, spidery bold writing someone had written "Can't effing spell".

Randa