genius transmissions

[jacques maurelParticipant @jacquesmaurel42310]

Videos for the quarantine:

**LINK**

**LINK**

**LINK**

**LINK**

[jacques maurelParticipant @jacquesmaurel42310]

[Howard LewisParticipant @howardlewis46836]

W O Bentley used three eccentrics to drive the overhead camshaft on his engines, rather than chain, spur or bevel gears.

Very ingenious!

I had the opportunity to study drawings of a transmission used in a fairly recent tank.

Very effective, very ingenious, and capable of transmitting reliably, (very necessary ) a huge horsepower.. But could I fathom out exactly how it worked? Not really!

These gear trains are a far cry from the unsynchronised gearboxes of early vehicles. On my PSV driving test, I had to demonstrate that " the quickness of the hand, deceives the ear'ole" by doing a "snatch" change on a hill. The unfortunate drivers of WW1 tanks probably had to do something similar with their lumbering monsters.

How they would have longed for devices like these!.

Howard

[duncan webster 1Participant @duncanwebster1]

That variable eccentric grabber arrangement is not new, I think it was Roy Amsbury who made a 5"g petrol loco using the same principle, described in ME back in the 70's. He also built a working 1/12 scale Deltic engine to power one of his locos. This raises him to supehero status in my book, the sort of chap who makes you think 'why do I bother?'

[HopperParticipant @hopper]

The NSU Max motorcycle of circa 1950s used similar eccentric straps to drive its overhead camshaft. Quite successful but it never caught on. Just too uncoventional i guess.

[Author]

Posts