Hello Chaps First post on this forum. My wife and I like many started with a tent, then a small trailer tent, then a bigger trailer tent, but now we want to move on to a caravan, the problem is we use a Citroen 2cv as our touring car and the smallest caravan I have found is an Eriba Puck. It's still too heavy for a 2cv, so I am designing my own. My question is about where the wheels should go (axle centre ) in relation to the body. Looking at many caravans the wheels seem to be at or slightly behind the centre of the body with the hitch being about 3ft forward of the body, A chassis building forum talks about the axle being behind the centre of gravity, buy I won't know where that is until its built.
I'm sure there will be 1 or 2 clever chaps know chassis design like the back of their hand. any advice would be appreciated.
Reference your query on the position of the wheels relative to the centre of gravity of your proposed caravan opens up a can of worms.
Bearing in mind that the finished caravan has to stable and safe on the road, it is recommended that advice is sought from someone who has experience in self building caravans. The kerb weight of the 2CV will be the deciding factor of the weight of the caravan when fully loaded and that may make the project non-viable.
I understand this is a tall order, and most have got round it by making a form of a teardrop. However I don't want a bed on wheels with an external kitchen, I want a proper caravan with a double bed, kitchen, toilet and storage. The kerbweight of a 2cv is 560 Kg, I assume that means the weight of the whole car if it were on scales. My goal is to make a caravan that weighs about 350 Kg. Stop laughing!. I'm a joiner by trade and I've had a look through the links you kindly directed me to, plenty of good ideas and construction techniques to consider, well done to Andrew Gibbens for a super tutorial and excellent diagrams, a picture is worth a thousand words. A lot of the weight in caravans seem to start with a heavy steel chassis, I'm trying to eliminate the chassis altogether, in effect tow the floor, with a steel connection from floor to hitch and individual torsion suspension hubs and wheels. Making the "BOX" is down to my joinery skills and some imagination, but it must be well insulated. I am however a bit of a perfectionist, so I will look at a lot of data and try to consider all parameters and take advice from wiser people than I. Weight of everything will be considered.
Thanks for the note on the kerb weight of the 2CV. That was my worrying factor!
If you use the recommended trailer weight of a maximum of 85% of the kerb weight that increases your all up weight to a possible 476 kg although you could tow up to the kerb weight as far as the law is concerned but both the Clubs recommend the 85% "rule". That gives you a bit more to go at than the self imposed 350 kg. The other datum you will need to establish is the maximum noseweight that can be imposed on the 2CV towbar. That will decide the noseweight of the proposed caravan.
If as you propose, you are going to "tow the floor" the stiffness of the floor will be a deciding factor otherwise the whole box will twist and that will cause problems with the attachment points of the various bits of furniture.
Please keep us all posted with the progress with lots of pictures.
Thank you Roy, The last tt was a camplet concorde, 2 double bedrooms, kitchen and lounge, it weighed 250Kg and the 2cv towed it easily,but I'm to old for canvas now. Other 2cv'ers have the Dandy tt at 350-395Kg and some say that feels like the limit for the 2cv's 602CC engine, so that will have to be my goal. Some caravans have wheels inside the body, some outside the body with mudguards and some seem to be half-way with half a mudguards, is this just aesthetics?