Ok, this was earlier posted here
The question is:
Is it worth it to series or parallel my scooter's drive system with an electric assist/drive using only capacitors to store energy during idle and use less power in acceleration?
Here's some basic specs about the scooter, thanks to http://www.bikez.com/motorcycles/hon...elite_1985.php
These are for an '85 but the '87 is the same other than it has no fuel filter (which I'm going to add) and it has an analog speedo, not digital.
Honda CH 250 Spacy/Elite
Engine and transmission
249.00 ccm (15.19 cubic inches)
Bore x stroke:
72.0 x 60.0 mm (2.8 x 2.4 inches)
15hp @ around 5-6k rpm, though I cannot find the source I had linked once. Google hits the little '15hp' blerbs, but no rpm, and on all the pages it links I don't find the reference. Anyway, I think its about right though the motor is EXTREMELY torquey for a 250cc from about 2500-6000rpm, giving it a very strong and smooth takeoff up to about 55mph. It idles at about 1200-1500rpm.
It cruises at 55-60mph excellently with about 1/3 throttle, right at about 4500-5500rpm (it develops a very mild rpm whine that barely increases up to 70mph, which leads me to believe that it is hitting near max rpm and nearly max gearing on the cvt at that speed)
So I'm guessing its making about 5-8hp to do 55mph. With a fairly efficient cvt transfer I'm guessing 4-7hp is actually hitting the road (rough estimates for number generation here).
4-7hp = 2.98-5.22kW so I'm looking at a 5-8kW motor to be on the safe end. I would like to be able to keep my 65mph cruisability though in case I need to go on the freeway and be able to maneuver for safety reasons, and that requires a solid 1/2 throttle to maintain, so about 8-10hp
8-10hp = 6.08-7.46kW (you can see I'm using a 0.746kW/1hp conversion)
This means I'm leaning towards a 7.5-8kW motor here.
So I need a motor in 7.5-8kW that's either a wheel motor for a 10" rim (or one built into a 10" rim). The wheel if not the original stock must fit
[ 4.00x10 ] _ [ 110/90x10 ] tires. (that's U.S. and metric sizing of the same tire)
I cannot afford batteries or very very little of them, so I'm just asking the question in terms of capacitors only. I need enough capacitors to produce at least 10hp for about 4 seconds, preferably more power for the same time or the same power for more time. At that point I'm going about 45mph or a little more so I'm covered for my town start/stop routine.
This is for a 70mile round trip commute which is about 50% of the distance (or 3/4 of the time) start/stop situations with at most about 2 minutes of cruising at 40-50mph, and the other 50% of the time back road non-stop cruising of 50-65mph. (I'm currently doing 55mph which is general car traffic speeds because the lanes barely fit all the Hummers and large F-U Vehicles people drive around, and they freak out every time they pass each other).
So... what controller, motor, and capacitor setup do you guys recommend? No regen braking, no battery system, I've got a fair amount of space on the sides of the scooter (no saddle bags, and I'd just sling them over the caps anyway) for small or medium sized caps (preferably flat ones like lighter fluid cans).