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Lutz

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Everything posted by Lutz

  1. Lutz

    Towing capacity

    No, nothing wrong. The 1300kg limit is what applies on a 12% gradient, as specified in the regulations. However, the manufacturer is at liberty to quote higher towing limits on gradients that are not so steep (usually 8%) if in his opinion the car is capable, although these are not shown on the V5. Vauxhall, Audi and others quite often make use of this option if there is a market demand. For a long time, it was common practice with Citroen, even on a 12% gradient.
  2. Lutz

    mass in service

    Manufacturers aren’t under any obligation to publish kerbweights and even if they do, what they call kerbweight is actually, upon closer scrutiny, mass in running order.
  3. Lutz

    Towing capacity

    I think you are a bit out of date with your information. Modern turbo petrol engines develop max. torque at roughly the same engine revs as diesels.
  4. Lutz

    Towing capacity

    There's nothing confusing about that. It just means that if you don't load the car up to its GVW you can tow a load greater than the 1300kg so long as you don't exceed the GTW. It's the BHP that gets you over the hill, not the torque. Work is force times distance and BHP is a measure of that, not torque.
  5. Lutz

    mass in service

    The actual weight should be shown under item 13.2 in the Certificate of Conformity for the car. The trouble is that, at least in the UK, the customer doesn't receive a copy of that document as a matter of course.
  6. Lutz

    mass in service

    Yes, it does include an allowance for the driver but the mass in service figure doesn't specifically apply to your car. It applies to that car of the same model that the car manufacturer submitted for type approval. This is usually a base vehicle with the minimum of factory fitted options applicable to the market where the vehicle is sold. The difference can be as much as 150kg.
  7. Lutz

    help required

    Yes, he got answers to questions that he didn't ask.
  8. Lutz

    help required

    Then the question should have been phrased differently.
  9. Lutz

    help required

    Anyone not taking appropriate action on a downhill section by easing off the accelerator pedal or even lightly touching the brake is asking for trouble. Given due care on the part of the driver, there is no reason why any caravan should end up as matchwood, whatever the weight ratio.
  10. Lutz

    help required

    The size of the safety margin is entirely up to the driver. If the outfit behaves badly at the allowed speed, it's up to the driver to drive slower. Only if he is not prepared to do that or if he has to go so slow to keep his outfit under control as to cause an obstruction to other traffic can one Talk about an unacceptable combination. I repeat, there are so many variables that weights alone are not a measure of how stable an outfit is or not.
  11. Lutz

    help required

    Because there are so many variables it cannot be straightforward. If one were to take into account all parameters it would be a lot more complex than it is. The reliance on weight figures alone is already an oversimplification. However, anything more appropriate would be beyond the scope of the average person towing his or her caravan as he or she is already confused.
  12. Lutz

    help required

    Any reluctance to change the advice is due to lack of resources to carry out meaningful research into the possibility of adjusting the 85%/100% figures. The effort required to establish meaningful alternatives is considerable because there are so many variables. I don't know who would have the means to fund such research and one would have to ask one's self whether there would be any economic justification to carry out such work anyway. The net result will undoubtedly show that considerable differentiation would be necessary in a revised recommendation, depending on the prevailing technical parameters and this would probably do more to add to confusion than to be of any help. For that reason I can understand why they just leave things alone, even if there is no evidence to support the current figures.
  13. Lutz

    help required

    The club doesn't say that you cannot tow above the 85% or 100% 'rule'. They only say that one shouldn't. It's not a rule anyway, but a recommendation, unless your insurance company puts a similar restriction on its policy (I believe some do). However, legally, you can tow 2100kg. If this weren't the case there wouldn't be any reason for the car manufacturer to specify a maximum towload of more than 100% of the weight of the car.
  14. Sterckeman belong to the French Trigano group of which Adria is also a division. Trigano are better known under various different brand names for their motorhomes (Benimar, Challenger, Chausson, etc.). I wouldn't expect a Sterckeman caravan to warrant closer inspection than one from any other relatively large caravan and motorhome manufacturer. All I know is that Sterckeman is their entry level brand.
  15. Modern turbo petrol engines can easily match the towing characteristics of a corresponding diesel so it's more a matter of economics. If you do much more than about 6 to 8 thousand miles a year (it depends a bit on the model, so it's worth doing a comparison) then the diesel has the edge, otherwise I'd stick to a petrol.
  16. In short you would not be able to make full use of the caravan's MTPLM without exceeding the car's maximum towing weight. I would also always question whether a quoted MIRO actually applies to the caravan in question because one cannot rely on the fact that the figure was established by actually weighing it. If you are unlucky, differences could substantially reduce the expected available payload.
  17. There is no piece of legislation that specifically refers to a habitation relay. Directive 2007/46/EC and 661/2009 only refer to general type approval requirements and only supply links to relevant specific details. ECE Regulation 10 covers electromagnetic compatibility and may have a bearing on the necessity of a habitation relay. UK Reg. 60 of the 1986 Construction and Use Regulations only covers radio suppression requirements for vehicles with spark ignition engines. The closest that we get is therefore ECE10. However, without going into details, I cannot imagine that if the towing vehicle doesn't feed the trailer (caravan) with a 12 volt supply, the trailer electrics would in any way affect electromagnetic compatibility. Perhaps an electronics expert can enlighten me. No, because from what I have learnt in the meantime, UK caravans have a totally different electrical system suited to the widespread application of a leisure battery, which not the common practice on Continental caravans. As is usual here, all the electrics associated with the leisure battery, including the charging system, had to be retrofitted by the dealer. Maybe, in view of this, I should withdraw from further discussion of this topic as it won't be of interest to those in the UK.
  18. But my caravan doesn't have a habitation relay. What's the point anyway when most cars (at least over here) don't have a 12v supply for the fridge?
  19. ps: The toilet flush works too, when we've had to make a comfort stop at a layby en route
  20. But neither pin 9 nor pin 13 are wired up on the electrical connection of my towcar and yet all 12v lights, water pumps, fridge, etc work while on the move.
  21. The R value for Luxembourg reached a second peak of 1.76 on the 2nd July and hasn't dropped below 1.0 since 8th June. German restrictions are imposed when the R value exceeds 1.0 over an extended period. Yes, it is true that the R value in Germany has increased, too. It was 1.27 on the 27th July, but only 5 days earlier it was 0.89. It has always increased at weekends, due to people returning from abroad and then dropped to well below 1.0 midwek.
  22. No, it is an absorption type. I don't know the exact model designation and I can't check at the moment because the caravan is in storage, but it is a Dometic and from memory it draws 75w when on 12v. There are no provisions for switching over the 12v supply from car to leisure battery unless it's automatic. At any rate, the leisure battery lasted out for a 10 hour drive to France a couple of weeks ago.
  23. Thanks for the replies. They clear things up for me now, because on my caravan (the 12v system has never been modified) the fridge works on 12v at any time. Must be the difference between UK and Continental caravans.
  24. Does that mean that they only work on gas if pitched without an EHU or do they work on 12v if not connected electrically to the towcar?
  25. It‘s not a question of what ‘eased’ means, but why. The answer to that is purely economics. Although there are no quarantine restrictions in Germany on travellers entering from Western European countries other than Luxembourg, the recommendation is that travel to Spain and the UK should be limited to essential journeys only.
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