Sunday, Nov 09, 2014 at 16:46
If certain caravan manufacturers ( or others) are offended by CR's written comments...good....them being offended is over due.
The fact is caravan technology has done very little in the last 50 years.
The fact is the majority of caravans are of a format that is fundamentally unstable.....and extending that format makes it more so........ and little can be done to improve that.....it is the problem of the format......
"fundametally unstable format"
There are people talking about speed reduction......
well I don't believe there should be any vehicle permitted on australian roads that is not fundamentally stable and perfectly safe at 100KMH, unless it operates under a special permit and carries rotating beacons and a
warning sign.
While the heavy transport industry actively discourages the use of fundamentally unstable pig trailers ( one with a single, centrally located axle group) in favour of far more stable fifth wheel and dog trailer formats, the vast majority of caravans remain pig trailers....they call em pig trailers for a good reason......thay handle like a pig.
There is another matter that CR does not mention..that is most vehicles towing caravans that are not designed to perform
well when near their maximum load capacity yet are loaded as such.
Allmost all heavy vehicles such as trucks and busses are designed specifically to perform at their most efficient when fully loaded....and in a commercial situation they are daily loaded fully.
Most of our passenger cars are designed to perform at their best when lightly loaded.
Thus their suspensinon are inhenrantly soft...this is not compatable with stable towing.
There has also much been said about these rediculous towing capacities many of these modern vehicles have.
Back to the caravan manufacturers being offended.
We all have to face the fact that almost without exception caravans are rubbish in comparison to mainline vehicle manufacture.....rubbish in every way.
Right from the wheels and tyres up.
Mostly the wheel and tyre format is pushed right up to its maximum capacity.....and them manufactured in cheap components.
NO main line vehicle manufacturer would even try to bring a vehicle no matter the price bracket to market with out shock absorbers and bump stops.....yet tha vast majority of trailers and caravans manufactured have neither.
The simple addition of adequate shock absorbers would improve the stability of any caravan or trailer.
look at
the springs...usually short stiff and mounted direct to a straight, flat chassis.....little or no design involved.
and we could go on.
If you find a caravan manufacturer that claims they have anything like equal design and testing input in to their trailer designs as the main line automotive industry....ask them how many full time engineers they employ and if they can show you the results of the last lot of lane change tests they conducted.
All the major vehicle manufacturers will have done their own lane change testing....and if you or I wish to do ant sort of serious
suspension modifications to an existing motor car we lwill be required to do lane change testing and produce engineers reports.
But none of this is required...in fact the caravan industry remains pretty
well unregulated.
There are no formal requirements to set up as a caravan manufacturer.
There are is mandatory testing of caravans
There is not even any formal requirement for caravans or trailers to be engineered under 4.5 tonnes.
HELL, you don't even need to have any qualifications to weld caravan chasis.
Then there is the rediculous situation that you can drive a 9 tonne combination on a pasenger car licence.
You cant drive a 6 tonne GVM coaster buss on a passenger car licence....and they are a hell of a lot easier to drive than a landcruider with maximum towing capacity hitched up.
I'm not sugesting that a bloke should not be allowed to weld up a simple box trialer or even something bigger at
home or that there should be a licence to tow any trailer.
BUT there has to be some sort of legal oversight introduced at some level.
Power to ya Colin...testify brother.
cheers
AnswerID:
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