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logiclee

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About logiclee

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    Over 1000 posts

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  • Gender
    Male
  • Location
    Mansfield
  • Interests
    Home Cinema, Technology, Cars
  • Towcar
    Passat
  • Caravan
    Challenger

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  1. Personally if you are only changing the rear tyres I wouldn't go with tyres of different load ratings on different axles. The handling difference will be small but there will be a difference.
  2. They are generally a very good towcar. I've had five. What year are you looking at? Petrol or Diesel? Manual or Auto? Lee
  3. For 1350kg many options are available, it just depends on your budget and preference. A mid sized saloon or hatch with a modern turbo petrol engine will typically give you plenty of low down torque, more power than the same size diesel and decent economy solo. A bit more info from the OP would be good. Something like a Passat, Mondeo, 3 Series, XE with 2.0 turbo petrol would eat 1350kg.
  4. Tow ball should be at the same height whether you have a BMW M-Sport saloon or a Range Rover. Rear suspension stiffness and rear overhang make all the difference.
  5. The effect of weight of the towing vehicle on stability while towing in normal conditions can be debated. The effect of weight of the towing vehicle and it's ability to control yaw inertia of a trailer with a sudden change of direction for some unforeseen circumstance is not.
  6. Not only car manufacturers. At 10% most family vans with an MTPLM of around 1500kg MTPLM would require a 150kg nose weight yet most UK vans will have a hitch rating of 100kg meaning even 7% is not achievable.
  7. The 2009 study was done it in conjunction with Bailey and the Caravan Club. This was discussed widely at the time. One of the conclusions was that yaw inertia increases with trailer mass and length which anyone with a decent understanding of physics will not be surprised at. So the heavier the trailer the more yaw inertia in an unforeseen situation, mechanical failure or emergency maneuver. The tow vehicle has to control this inertia, hence why the caravan club at the time reiterated it's 85-100% recommendations from that report. Of course there are other contributory factors like real axle weight, rear overhang (Leverage), suspension, center of gravity, loading, wheelbase and road friction etc etc but that's why the 85-100% recommendation exists to give a margin of safety. Of course you can badly load a caravan at 85% and have an accident or have a badly maintained outfit at 85% and have an accident (How many blow outs do we see?) But as Scotty says "Ye cannae change the laws of physics” If the caravan exerts more force than your car can control then you have an accident.
  8. My van felt unstable when I collected it and the match then was 67% then. (Jeep Cherokee) I've towed with it with cars since up to 97% loaded correctly and it's very stable. (Mondeo 3.0V6) But does it feel stable is not the big issue with the 85%-100% recommended ratios. It's the ability of the tow vehicle to control the caravan is an unforeseen situation. If the tow vehicle does not have the mass to dampen the yaw of the caravan in such situations then you will have an accident. It's just margins of safety.
  9. Speed has a much bigger effect to stability from minor oscillations. But the study also shows that a major disturbance that will introduce significant Yaw such as a sudden change of direction in an emergency situation will only be recoverable if you have a sufficient weight advantage in the tow vehicle to control the yaw. My caravan empty is very unstable, I thought I'd made a huge mistake when collecting it. The noseweight with nothing in the front locker and just the battery fitted is 30kg. The bed, kitchen, battery, water tank, fridge, and longer front bed are all on the same side,
  10. It's not an age thing it's experience. I see 65 year old caravanners on site and they have retired and it's their first season. I bought my first caravan at 18 (After a year with a trailer tent) and I've towed every year since, I've never been without a caravan since. So that's 32 years caravan experience from a 50 year old. And towing trailers for work and car transporters for motorsport. In my late 30's I was often "Advised" on towing while filling up my water or chatting, being polite I didn't like to mention I'd being caravanning for around 20 years already.
  11. There was a University study many years ago that measured the effect of towing ratios and speeds. Very interesting reading. Speed and towing ratios both have a significant impact on stability and the ability to control the outfit if you have to make sudden direction changes at speed. They also measured other stability changes with loading etc. I'll have to see if I can find it when I'm home.
  12. It wasn't. Cut my losses after 3 months and bought a new Passat.
  13. My C5 Exclusive 2.0HDi Auto had a Mass in Service on the V5 of 1740kg. (Heavy towcar but dire reliability, build quality and dealers)
  14. Manufacturers design weights and plated weights are there to cater for all trailers and the capability of a vehicle to pull away on an incline. For instance you may pull a 3000kg triple axle builders trailer behind a 2000kg Land Rover and will be perfectly safe. Caravans are a different animal though as you have a much higher centre of gravity, a much longer trailer increasing yaw and high sides that are easily caught by wind. It's all about the safety margin and you are way above what any organisation or club recommends. Also as another poster has said check your car insurance as some now stipulate that the maximum weight of the trailer shall not be more than the cars kerbside weight.
  15. Having a similar engine and a few more safety devices means little. What he has is 200kg more weight in the towing vehicle. At 112% ratio you are into the zone where if you get into an issue the car will not be able to control the caravan. I have 32 years towing caravans. The idea of a 1685kg MTPLM caravan behind a 1500kg Kerbweight car fills me with dread. I wouldn't do that myself never mind put my family in that vehicle. I strongly recommend you get something heavier.
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