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 Topic: How do you measure nose weight?
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05/9/2018 at 10:44am
Location: North Wales
Outfit: Elddis
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Joined: 22/8/2018 Standard Member
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I don't think I have a problem, however nose weight has always been a problem with cars with soft springs, there were a host of spring assisters made blow up balls inside the coil spring, extra leaf which bolted on, and special shock absorbers.
One method was a spring between the car and caravan, this also had a fraction shock absorber built in so both lifted rear of car and reduced snaking problems.
If using one of these, then not sure how you can measure nose weight, it will be less than weight measured at ball with caravan disconnected from car, but how much less?
In the old days the important thing was ground clearance at the ball, you simply wanted as much weight on the ball as possible without causing jockey wheel from hitting the ground.
I would guess you would need to add recommended nose weight to car and measure deflection and then ensure same deflection when the assisting spring is put in position, but are there any laws on this or just common sense?
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05/9/2018 at 7:51pm
Location: Teesside
Outfit: Mitsubishi ASX4
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Quote: Originally posted by ericmark on 05/9/2018
One method was a spring between the car and caravan, this also had a fraction shock absorber built in so both lifted rear of car and reduced snaking problems.
If using one of these, then not sure how you can measure nose weight, it will be less than weight measured at ball with caravan disconnected from car, but how much less?
Lets start with the basics. The spring you describe will not reduce snaking problems. It will mask any instability problems that exist until such point as you get a more severe snake. Stabilisers don't stabilise, they just dampen the motion a bit, which is great if you have a stable combination.
The second point is that it will not lift the rear of the car, it cannot. Any "lifting" of the car would be transferred to the caravan hitch so it would press down more on the towball. Result no difference.
Get an old pair of bathroom scales and a block of wood. Put the block on the scales, and zero the scales. Then drop the hitch onto the block so the caravan is very roughly level and measure the noseweight.
I'm sure someone will rush in to suggest the caravan must be exactly level, however that's not true, a few degrees off level makes virtually no difference.
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