Heavy utility cycles will become a very large part of transportation as people wake up to the reality of climate change. It is not easy to understand how to provide enough low-speed torque thrust that is needed to climb steep hills at legal speeds. Bigger motors are not the best solution. Proper gear to power matching is much more efficient and economical, especially in terms of mileage.

Many people confuse torque with power. They are different terms. Motors can have high torque-thrust at slow hill climbing speed, or low torque-thrust at a high top speed and yet have similar power output.

Step 1: Determine Your Hill's Steepness

Measure the steepness of the worst hill that you cannot avoid climbing. Use a level and a ruler (metric or decimal), then divide rise into the span to get the grade percentage.

I've been working on a little idea using a hybrid electric and hydraulic drive system... it seems to fit right in line with what you're talking about here. if anybody has any information about drive by hydraulic systems please get in touch with me. my idea is to have a tandem device with electric motor and hydraulic drive where the electric motor can power the hydraulic system or the hydraulic system can assist or power the electric motor making an all-inclusive assembly. then if you have one, you can make a unicycle. 2, you can make a motorcycle. 3 or 4, you can make a trike or car. more you can make a semi / hauling / commercial type of vehicle...
<p>I would really like to see more info on that project. Do you have a blog?</p>
<p>I do not. so far i've just been tinkering and planning. need metal shop and hydraulic experience/support to go further</p>
Very useful information<br>Thank You
<p>Very interesting information! Thanks for sharing!</p>

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More by Professor Prodromal:Engineering a Power System for heavy cycle-trucks and velomobiles 
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