Frame - 20mm x 20mm rhs
suspension - motorbike shocks, semi indepent front, swing arm back.
drive - leaf blower engine ~30 cc
running gear - starter motor sprocket /flywheel, bycycle hub transfer
steering rack and pinion
my second attempt (the first was made mostly of wood, no suspension, no motor, rope style steering, atomotive tyres/ bearings)
pro's: i welded an additional cog to a bike rear wheel hub (see pic 2), the rear wheels are only aeffected by the engine when the engine is running.
areas for improvement: weighty front end, engine mount upgrade- flywheel bounces drive shaft a bit, no brakes , no clutch, no reverse, 1 gear.
summary: i was hesitant to attach a small motor, alot of effort when i wasnt sure if it would power it at all, I am however happy with result. It has provided a good reference point to base ratio/ torque estimations in future projects.
slowing the engine was the most difficult thing, something about compounding gears.
the first configuration i tried the rear sprocket was too small and it was like starting the vehicle in top gear, found a larger one, now it runs. i would however like to reduce gearing further, maybe with off the shelf reduction box, or custom cut sprockets/gears.