What thickness HDPE?

Yeah, is 20mm a good thickness or does it have to be thinner?

what are you using it for ????

armour???

bulkheads???

part of a weapon???

need more detail to help you

Armour, Chassy and a bulkhead ;D?

what weapon you going for and any design pics or drawing to judge sizes etc from???

50mm done :)

Im going for a over head bar spinner like, hazzard or maybe tornado mer.

Thanks
-Toast

hmm toast omnom, -

anyway but would still b more helpfull to see a design or something, as you'll most likley want it different thicknesses throughout the robot and all that

Mhmm, Im still not sure, Im going to have a 3 or 4mm aluminium bassplate but would 20mm hdpe be too thick and heavy for a four drill motor drive, hazard type bot?

Also I know this is off topic but what type of motor could I use to power the lawnmower blade or bar?

i would have thought 15mm hdpe would do, but again it depends on your design and how you'd mount your lawnmower blade and everything,

and just go for a motor called a speed 900 because its simpler that going brushless and since its your first robot you'll find it easier to get up and running although your still gonna find building a spinner difficult at first

Thanks alot, and where do I find the speed 900 motor i found on on a americain site
http://www.hobby-lobby.com/speed_900_bb ... 1_prd1.htm IS this it?

Thanks
-Jay