Bob Reeve’s Differential Demonstrator

[Neil WyattModerator @neilwyatt]

A short video of Bob Reeve's differential demonstrator using shop-made bevel gears as described in his recent articles in Model Engineers' Workshop.

[Neil WyattModerator @neilwyatt]

Follow up to MEW articles.

[Roger Williams 2Participant @rogerwilliams2]

Just beautiful !.

[Paul RhodesParticipant @paulrhodes20292]

Nice job.

[ChrisLHParticipant @chrislh]

Very nice.

But I didn't get the point being demonstrated by engagement of the wooden wheels. I hope it's not obvious to everyone bar me !

[vintage engineerParticipant @vintageengineer]

The wooden wheel device was invented by Dennis Motors as a very cheap way of locking the diff so both wheels were constantly driven.

[Mick B1Participant @mickb1]

Posted by ChrisLH on 06/12/2022 19:57:00:

Very nice.

But I didn't get the point being demonstrated by engagement of the wooden wheels. I hope it's not obvious to everyone bar me !

Going by the perceived passage of the bars drawn on the wooden wheels, I guess that's intended to demonstrate the diff's capability to cope with the tyred wheels running at different speeds – though I didn't readily see how that was achieved…

Ah, it must be the little cuboidal gearbox between the wooden wheels !

 

Edited By Mick B1 on 06/12/2022 21:14:32

[Ian PParticipant @ianp]

Posted by vintage engineer on 06/12/2022 20:32:23:

The wooden wheel device was invented by Dennis Motors as a very cheap way of locking the diff so both wheels were constantly driven.

So was this wooden wheel device ever fitted to a vehicle? (or anything else?)

Might be very cheap but does not look to be very practical on a road vehicle

I'm assuming you meant the Dennis motor company

Ian P

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Ian P on 06/12/2022 21:35:47:

I'm assuming you meant the Dennis motor company

.

… Dennis Specialist Vehicles: **LINK**

https://en.wikipedia.org/wiki/Dennis_Specialist_Vehicles

… and I am assuming that the wooden wheel arrangement is simply a ‘Rolling Road’ for the purposes of demonstration.

MichaelG.

Edited By Michael Gilligan on 07/12/2022 05:36:13

[Neil WyattModerator @neilwyatt]

The wooden wheels are geared (with conventional spur gears) to move at a 2:1 speed ratio to simulate driving in a tight circle.

Neil

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