Sounds like what I saw at Wrexham last year. Presumably its had more done on it since then. I was talking to Arthur about it which was very interesting.
+ Completely modular construction,
+ tracks can be swapped for wheels, resulting in a speed increase by about 300%
+ Theres a dog clutch gear change incorperated in both drive systems
+ low gives about 30mph with wheels,
+ high about 120mph [i.e. a full body spinner mode]
+ axe also features a similar clutch so the axe can also be used as a front hinged flipper/self righter
+ Ti monocoque
+ magnets above tracks
+ lifter was more Biohazard style than the old lifter.
This is all from memory so some of it might be a bit out but the photo on my profile is quite detailed [you can see a hobby RC servo near the bottom of the photo that was used to change gears in the drive train] needless to say the whole thing was magnificently engineered.
If anyone wants more photos Ive got a couple of others showing more detail in the gearing, just email me.
It would be interesting to know what progress has been made since then.
Mark
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