In article ,
The Natural Philosopher wrote:
It's the major factor. In still water a single person can move a ship
weighing many tons. You'll not do that with a similar weight vehicle.


Due to the tyre rolling resistance.

I can in fact push a van weighing several toinnes on well pumped up
tyres on a dead smooth flat road.

I'm talking about a small ship like say a trawler where I've seen it done.

I'll bet you'll not move a truck weighing anywhere near as much.

--
*A closed mouth gathers no feet.

Dave Plowman London SW
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