yer fusckin nuts ;->
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Mechanical engineers build weapons, civil engineers build targets

I take it the O-Ring = some sort of slip/friction drive ?

a Direct Drive outrunner brushless is bound to destroy the spinning magnets on the first impact otherwise
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Nope, not direct drive. Would risk that! The O ring is the belt, between the two small metal pulleys. ATM the only hurdle is attaching one of them securly to the brushless shaft, as they lack any setscrews or similar. I might end up ordering something from somewhere.
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2.5mm drill bit + 3mm tap + 3mm grub screw = problem solved
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Hmm the problem though is there's no area outside the pulley... unless you mean I could do it into the pulley surface itself... hmm... Kewl!
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Through the middle of the pully will work if it doesn't have a boss. Just make sure the grub screw is flush with the serface so it doesn't wear the belt/o-ring
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Well, that didnt work. The pulley got deformed and I dont have a tap set so was trying to use screws!
I decided to reuse the old frame, seeing as it's a lot of hard work already done. I've replaced the crappy thin bar with a thick steel bar, which is longer and heavier, and hits harder! Good thing about this design is I can easily change the ground clearance. Seen here, it's under 1mm hehe.
Piccies so far:

And how the electronics will fit in (not yet in there)

... yes, its a huge brushless esc lol.
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Beetle's have been put on hold till after robowars, however afterwards i've got plans to make a full professional one seeing as welch and nick will finaly have time to do theirs!
Just a question mainly directed at nick regarding timing belts, what width would you say is advisable? I'm thinking 10mm is slightly over kill... 5mm?

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Well, I thought this was very interesting... https://www.unitedhobbies.com/UNITEDHOBBIES/store/comersus_viewItem.asp?idProduct=4236


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Not wanting to spam another thread, my beetle entry for battleshed's beetle comp (first ever) is pretty much done, and it hits very, very hard.

Just gotta put a little armour on it, 100g underweight w00t!
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