Wrong. There HAS to be some weight on the tow bar to get the required stability. Ask a manufacturer if you cant understand basic physics!
Yes.
But because of the lack of leverage between the rear wheels and the tow bar the effect is very marginal. And some extra weight on the cars rear wheels aids stability anyway...
A66 caravan smash 600Once you get a lot of energy stored in an oscillating system comprising a car and caraven rolling on rubber tyres over...
hardly
Actually it improves directional stability. It causes understeer if anything at all which means it wants to travel in a straight line. It may however increase the understeer when cornering on the limit Not something you would want to be trying while towing a caravan hopefully! In any case the lightening effect on the front is tiny. Do you realise you would need to add well over ten times the cars own weight to lift the front wheels!
This will happen no matter
Only in your mind. A trailer is a trailer. You can call it a truck or a caravan. The only difference in engineering terms or physics is that ther centre of gravity is much further in front of the centre of pressure in a trucks trailer. This leads to a) greater stability. b) greater weight on the tow point. Moving the c of g of any caravan forwards by for eg shoving all the heavy luggage food etc forwards will and does increase stability. If the caravan snakes at your given motorway speed then you need to increase the towbar weight. Simple physics.
Your "objections" are at odds with the physics, the facts and the engineering.
A66 caravan smash 598Not to any significant extent. Remember cars are intended to be driven with or without up to 5x pbuttengers of 200 lb each...
