The H Trike – Part 3

Drives galore! I’ve had quite a few drives round my estate both on and off road – super legal… of course, all private land… yada yada yada.

I’ve done a small video showing parts of the trike and my gran filmed me driving around in the bottom of our close.

 

Battery life and performance
As can be imagined, on-off steering isn’t the best method but as I don’t really have much equipment at home, its all I can really use! I’ve sent off for PCBs with my motor controller on and a joystick controller too. On a side note, I’ve also designed a neon clock which should be quite cool – also coming with those PCBs.

Each wheel is driven by its own controller and battery pack and throttle and braking is provided by the handheld controller I’ve made. After a drive, surprisingly, the voltage of each of the batteries is generally the same, within 0.1V indicating equal use of power by both wheels.

Having just completed a quick test drive, on mixed terrain, I was able to achieve a total of 2.1 miles on mixed terrain (hilly off-road and paved) before the batteries were down to 22.6V. While this isn’t as low as these packs can go (19.2V), the trike starts to feel a bit sluggish by this point so I generally stop and charge the batteries. Fortunately, my 60W Turnigy charger can charge both batteries in a couple of hours.

Edit: After taking it for a late night drive where the roads are free, I have some top speed data, a total of 11mph! If running at the specified voltage, I could be looking to expect speeds of ~17mph (11*36/22.2)

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Upgrades
I’ve been mulling over a new design that would be much smaller and lighter to design (and or make) while at university, this version would only be 800x450mm as opposed to 1000x650mm and also made out of aluminium. I’ve considered making it out of a single piece of 12mm thick aluminium plate though weighing up the laser cutting costs for this is my main issue here! This version would feature 2x 6.5″ hub motors instead of 10″ hub motors and would be much less suited to off-road terrain. It could however be used fine for pavements etc. It would still have the same dual drive methodology so I’d be able to use the same control methods that I’d use for this.

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