Gear Box Rantings

[Nick]

So I’m guessing that double de-clutch heel-and-toe gear changes are a thing of the past?

Well in this case that is the goal. The bike gearbox should enable clutchless shifting assuming everything else plays along. In most other cases I will likely find myself in heel-and-toe is definitely a thing.

[Nick]

v0.2

[pre65]

Have you got to make it vibration proof ?

[Nick]

That's the plan. (for some value of vibration)

[Mike H]

Now contrast this with a typical bike gearbox. We'll stick with 4-speeds for simplicity.
The forks and selectors are the same as on a car. The difference is in how the selectors are moved. There is a cylinder (called a barrel) which has a 'wiggly groove' or channel running around it to control the 1st - 2nd selector and another channel for the 3rd - 4th selector. Each selector has a pin which runs in the appropriate channel.

Just to mention, for giggles, that for a Ural gearbox or similarly arranged, there is a plate with wiggly grooves in it, that rotates on a shaft. In the case of Ural, there is a second such plate for reverse gear. A pin on the reverse plate serves to interfere with the other plate to prevent reverse being selected with any other forward gear. This is achieved with a slot in the forwards plate only aligning with the pin of the reverse plate in the neutral position. A useful side effect of this arangement is that the reverse lever can be used as an aid to finding neutral, i.e. search for neutral with the left toe at the same time depressing the reverse lever.

[Max N]

I think this is a video showing the plates Mike?
Looks satisfyingly complicated

[Mike H]

Yep.

I may have been wrong, looks like the pin is on the forwards quadrant, and the slot is in the reverse quadrant.

That would actually make more sense.

[Nick]

Very short clip of the car with the H2 engine and the Westfield with a Z1 (I think it is) engine. Both with the gear control box. It was the first shake down for the H2 engine car after spending a day at the dyno with it. Stuff to do (as there is always).

[Max N]

Congratulations Nick!
Looks like a very successful shakedown.

[Nick]

Nothing important fell off

[Ali Tait]

Nice work Nick.

[Mike H]

Epic!