Hello from Tunbridge wells

[Involute]

Should I continue with images of the Centre Hub Steering bikes development?

[Guy Mayers]

Yes please! One day, when I'm in Tunbridge Wells, I might drop in for a cuppa! This work is so beyond anything I've done I'd love to see more!

[Involute]

Your welcome to, the bikes are still here, but they don’t get used now sadly, and I don’t have CNC equipment here, just, a lathe, Tig, Mig, etc etc, but for my current project CNC wouldn’t suit, it’s mostly hand work.

[Guy Mayers]

I'm probably going to be at Gerry's early July. I'll check back with you then?

[Involute]

I'm probably going to be at Gerry's early July. I'll check back with you then?

My next surgery on my ankle is 4th July, I’ve had an ankle replacement fail catastrophically, so it was removed, 24th April, leaving a 40mm gap between the tibia and talus, 4th July is the next phase, this involves, Donor bone ground up and mixed with my blood and stem cells, in an attempt to regrow the bone in order to fill the gap and fuse this joint.
so il, be on crutches, but if I’m getting about your welcome

[Normb666]

Bloody L.....all I can say is "ouch"!!

But just out of interest, there used to be a pub near me called the Ankle Bone. It was a bit of a low joint tho.... (sorry, couldn't resist!)

[Guy Mayers]

I'll leave you in peace to recover from surgery! I'm own with Gerry every month so plenty of time for a garage hour or two when you're on the mend!

Hope it all goes well!

[Involute]

So after spending what seemed like an age doing all the cad models for the bike, I ordered some aluminium plate for the major components.

Flat pack motorcycle




machining one of the chassis/engine plates, no pain no gain.




not enough Y axis travel to do the whole thing in one setup, so had to move the head out and re clock to do the last 100mm


one side outer more or less finished, after dry build the inner was also machined.

[Involute]

Incidentally to create the cad file for the above the Aprilia engine major component and key mounting points where scanned using the CNC mill and a touch probe, to create a XYZ point cloud.


my original probe, designed for use with Mach3 CNC software controller, and the subsequent probe I made to scan the engine.



this is the early stage chassi, the tubular section is Inconl, WHY because I had a load of tubing left over from a job, so it was free, it’s a nightmare to work with on a structure like this because it moves all over the place during welding.


This engine is a spare Gen1 engine, ultimately I used a Gen2 one but with gen 1 ecu etc.

In the first photograph here of the chassis anyone recognise the crankcase just visible on the right???