The Plan
- Weigh all the parts.
- Make mock-up accelerator pedal.
- Run 20 minutes
Family
- Early kicking practice with Tom.
- Watched Tom's game (he scored 29 points by himself, 3 tries and 7 conversions, 7 from 7). Record game. Didn't play last 5 minutes (substitution on). During that time, the other team ran in three tries.
- Then was Touch-line ref for Jack's team. Jack had an incredibly strong game, again. Very strong play as forward. Constantly driving and holding out the other team.
- Lunch with the boys.
- Went down to Poppy's and ran the Quad bike for 2 hours.
Fitness
- Run as touch judge for the game (not very hard to do).
Electric Go Kart
- Made a mock-up wheel.
- Made a mock-up chassis.
- Completed sketch-up drawings of the chassis.
- Got a 20mm axle from Poppy.
- Realised the speed calculations were potentially wrong.
- Started to file down a cog - can be filed ! (but not drilled).
- Discovered (by research) a motorbike with 2 x 650W geared motors MY1010 (ie 1300watts, versus 750 watts, but same gearing).
- Bikes show larger sprocket simply welded inside 14tooth sprocket on motor.
- Geared for 32kph, 1300watts gives slingshot acceleration.
- Kart geared for 16kph should give same acceleration.
- 14/32 gearing shows 18kph, on 19" diameter wheel.
- 10/32 gearing shows 13kph, on 19" diameter wheel.
- Both of these speeds are probably right, for around the house. Top speed might be slightly too fast.
- These are "good" speeds, allowing motor to work at a sensible pace.
- These allow motor to be efficient at top speed, and given that most of the time it will be accelerating or decelerating (for corners), it won't be too highly geared for use around the house.
- Gearing for higher top speed will stress the motor for take-off, and regular accelerating.
- Gearing for higher top speed will also reduce life of batteries (inefficient range for motor).
- Higher top speed will require a kart created for higher top speed (ie safety, width, braking, padding, roll protection, suspension, etc).
.....When the current electric go-kart gets too slow ...
- Make a cool 60's style "dragster" with 2500watts, and Alltrax controller, and Lipo's (burnouts, and wheelies ... but limited range).
