Thomas Transmission

Yep

Wot Morrie sez

cya

local guy had a whipper powered bike,neatly done ,and the final drive was the bevel box off a 9" angle grinder.......one day I saw the cops had him pulled ,and a tilt tray turned up and took the bike......apparently the cops were seizing it because it had a 30cc or larger motor.......you have to pay full rego on a powered bike.......absolutely ridiculous ,IMHO.

The coppers had a crackdown on powered bikes here a few months ago for the same reason, haven't seen them lately, theyre probably too busy fining people for not wearing a mask in coles.

I wonder what they would make of this one?

Its like everything else they either want to tax it or find some other way to make you pay for it, thats why they don;t like home distilled liquor, bootleg cigarettes or any other type of illegal drug. Just look at what they are going to do to electric vehicles to get more tax revenue out of them since they have finally realised that the fuel excise doesn't apply to them.

Perhaps some ideas to get the cogs turning, to help understand the principles of
Grandad's Thomas Transmission and similar machinery.
Take a common vehicle diff assembly and set it up with one axle driven at any
given RPM, then drive the other axle in the opposite direction at the same RPM.
The crown wheel and pinion should then not rotate at all.
Now, speed up one axle RPM and work out what the crown wheel and pinion do.
This is not the exact principle of that transmission, but might give some idea of
how double input - single output differential drives operate.
Sometimes used for accurate control of motion in machinery.
Truck differentials and power dividers transmit high torque, with the spider or
epicyclic gear train itself operating at normally low RPM.
Hope this helps, Paul.

Mack used a gearless differential for many years......the interaxle power divider in all mack double reduction axles is cam and plunger ,some dont have lockout,as its allegedly not needed........in addition, cam and plunger differential was an option in all standard weight mack diffs,and standard in the big diffs used in offroad dumpers......CRD 95/96 from memory.

And ,by the way,motorized roller skates must be registered in Qld if used on the road......Including electric roller skates over 100watts ......Carrying the battery pack on the rider doesnt exempt the skates from registration.

The next bit was to adapt the crownwheel to chain drive, I found a suitable chainwheel on one of the kids bikes that was in the garden.The face of the gear was quite wide so I was able to machine half of it down to suit the next stage, fixing the sprocket to it.

Then I made a couple of holes in the diff casing to run the chain through.