At the moment I have three e-bikes (who only has one?):
Bike 1. Cyclone 500W (6s 10,000mAh LiPo or 6s 17,000mAh LiPo) driving a rear derailleur and DualDrive.
Bike 2. Astro 3210, 2-stage drive, (12s 10,000mAh LiPo) fixed gearing giving about 16mph.
Bike 3. 250W MY1016 Unite Motor friction drive (6s 5,000mAh LiPo), top speed about 8mph.
I live in an area with lots of hills/mountains, many 10% to 20% inclines, but, apart from hill climbing, my main priority is to not attract attention either audibly or visually - "super stealth".
The Astro and Cyclone are too noisy (roughly the same level) - people hear them coming and some turnaround to look. It is possible to run Cyclone at low rpm when reduced noise is necessary, the Astro 3210 bike does not like running at low speeds.
The 250W friction drive is quiet and few people notice the noise.
The 250W friction drive is not noticed because the bike looks like it should be on the scrapheap, an empty milk bottle covers the battery and a cardboard box the motor).
The Cyclone motor/gearbox is partially hidden by the BB so most casual observers do not see it (battery is in a backpack).
The Astro drive system is more visible and often noticed (admired by some).
I use 250W friction drive bike when there are no steep hills and I am not in a rush e.g. going to the pub.
The Cyclone bike is used for everything else - mountain paths (up to 15% incline, transporting wife etc).
The Astro bike lies unused - I could fit sprockets, layshafts, chains etc but this would only increase the drive system visibility - I am about to remove this drive system and put it in the "Items for Sale - Used" section - such is life!
Builds just started:
Bike 4. Two wheel drive
Two 350W geared hub motor kits have arrived from cellman.
Plan to run on 12s 10,000mAh LiPo, guesstimating 44V x 17A x 2 or 1,500W.Ã¢â‚¬Â¨Disc brake rotors should mask these small hub motors (larger diameter DD hub motors are too visible).
Will use a mule bike to try the system and eventually use a steel frame and forks, fatty tyres and maybe suspension seat post.
Battery, as usual, will be in a backpack.
Bike 5. Tricycle
Will use a 500W motor (48V 12A) and chain drive to axle (d
id think of 2 rear hub motors but wanted to do something different).
Motor will be hidden under a passenger seat or in a tool box.
Battery pack type and location as yet undecided, probaly use 12s 10,000mAh LiPo to test.
Cyclone 500W, SRAM DualDrive, hardtail; 8s Lithium Iron Phosphate, 38A
Cellman 350W geared hubs, 2WD, hardtail; 12s Lithium Cobalt Oxide, 2 x 17A
Cellman 500W Mac rear geared hub (upgraded gears), full suspension; 12s Lithium Cobalt Oxide, 59A