I've been working on the new base. It's still going to be a reverse trike, because I really like the look. But it complicates things because I want to both steer and drive from the front.
I've worked out the steering, but to get drive in the front I'll need a differential axle.
The internet is vast and wondrous! I found a paper online called "Design and Development of Open Differential for Transmission System of Quad Bike". It's a great explanation of an open differential and they show their work!
For my differential, the crown gear will be a sprocket and driven by a chain. The front wheels are 20"D. Now I need to measure the distance between the front wheels and between the front and rear wheels, so I can calculate the ratio for the bevel gears.
For my differential, the crown gear will be a sprocket and driven by a chain. The front wheels are 20"D. Now I need to measure the distance between the front wheels and between the front and rear wheels, so I can calculate the ratio for the bevel gears.
I calculated the ratio at 1.4:1. The closest ratio they make is 1.5:1. Those are not as common and are pricey. Maybe I can extend the wheel width to make the turn ratio 2:1, but I think that might be too wide.
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