Started out as a crawler for inspection of empty pipelines. 400mm long, 370mm wide, 120mm high. weighs 9Kg. drive motors are from cordless screwdrivers rated at 4,8V and 220 rpm.(translates to approx. 2,5Km/h. controled by standard R/C transmitter & receiver. Motor controlers are 2 x tazer 15T's powered by 2x 6V 4Ah sealed lead acid batteries. Camera and video transmitter 2,4Ghz powered by 1x 12V 7Ah sealed lead acid batery stepped down to 9V by means of DC to DC buck converter rated at 3Amps. Camera pan & tilt with standard servos. Hull aluminium frame covered with fibreglass. Road wheels and drive sprockets plywood, and tracks are solid 2mm conveyor belt. Runs well although no suspension or track tensioning. Only problem is the video transmission range.
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