Question about double drive diffs

Roymondo:

norb:
I’ll try and put in a very basic form Juddian

If your going in a straight line ad for example both wheels are doing 100 rpm each ,so that is a combined total of 200rpm.

If you then take a bend then the inside wheel ha to slow down and the outside needs to speed up…So as an example the inside will slow down by 25rpm as it is taking a tighter turn and that 25 rpm will go to the outside wheel …So you still have your combined total of 200rpm.

The transfer of RPM is done through the differential,Thats for another day JUDDIAN lol

Another analogy which ex forces will recognise is when they are marching ,If again going round a bend the man on the inside will then take shorter steps and the outside man takes larger step,if they didn’t it would be a bag of [zb]…And if the diff didn’t do it’s job it would try and push the vehicle forward

Has that helped lol

Sorry - but that “combined total of 200rpm” when the actual rotation speed is 100rpm is nonsense. When travelling in a straight line, both wheels rotate at 100rpm because the whole axle is moving as one. No part of the system is rotating at 200rpm. When the vehicle negotiates a bend, the inner wheel slows a little (e.g. to 90rpm) while the outer wheel goes a little faster by the same amount (e.g. 110rpm).

get a grip i just made the figures up for an example of how it work .it wasn’t exact figures ,if you read the post it was to keep it simple …But feel free to give the exact figure ,as you obviously know the engine hp ,gearbox ratios, diff ratios , tyre size ,tyre wear,road conditions ,wet /dry .and the exact amount of frition ,speed of the vehicle ,and radius of the bend ,Not everything on the forum has t be worked out to the decimal point ,when you are trying to give a basic understanding