Cheers for the feedback. It is much appreciated. Please tell me if my reasoning is weak. I am here to learn
neptronix wrote:crystalyte HT might do the trick, but a geared motor is always going to be better at climbing given the same amount of input power..
..If cost is an issue
Simulator play has the Chrystalyte front torque motor performing significantly worse than the BMC V2T. The Longjohn cargo bike is surprisingly stable at higher speeds when carrying cargo, but is very wobbly below 5 mph. My intuition is to value low RPM torque very highly, and from what I can tell, the V2T comes out ahead by a comfortable margin (at least compared to the other motors in the simulator)
As for cost, I'm not too worried about price margins. I'd prefer overbuilt to cheap any day. The V2T seems to have a solid performance from what I have been able to tell. But I'm happy to learn otherwise ofc
For cargo hauling up inclines it might even be worth considering a mid drive through the gears setup if they are legal in the EU. something cyclone like etc.
I will be playing with mid-drives later in my EV career I reckon. Needing to carry very heavy loads calls for power well in excess of 250w. But by keeping to 25kph and generally riding with the crowd I hope to stay under the radar and out of trouble. A hub drive should help with stealth as well. Denmark is almost as big a bicycle nation as the Netherlands, So I will rarely have free reign on the bikepath anyway.
Are you using a 16" or a 20" front wheel? Just curious, what are you hauling?
I don't know if you can find a bicycle hub motor capable of pulling 300kg up a 10% incline. And even if such hub motor exists, the driving tire might not have the necessary traction. You might want to consider an all wheel drive setup.
As for wheel size I am using a 16" moped rim. Add a tire and the wheel becomes 20". I apologize for the lack of clarity. As for cargo I am looking to replace a car, so I will be hauling the runt as well as the occasional heavy project item, like electromotors, hydrogen fuel stacks, fabrication materials, welding kit etc
The bike needs to be able to fulfill all my daily urban transportation needs. So I need to plan for the heavy stuff even if I wont be needing that capacity all the time.
My commute is mostly flat with a short and steep climb halfway. If I take a small detour I can reduce the incline to about 5%, which would be much more manageable.
miuan wrote:Welcome Tom, have you managed to get in touch with the ev-power company? Good luck with the beast!
Not personally, no. But some of the EV builders on campus have used them and recommended them as fairly inexpensive for what you get.
My biggest question is WHY pedelec? Is it because of legal issues? the police is not interested in such minor issues.
Another question is why those batteries? Why not a Pingbattery.com?
Cheers. I'm looking for Pedelec with an override "fun" switch. This way I feel decently safe around cops. I will be commuting to and from university, where the police will have bike raids several times a month, doubly so during winter season. I want to look
legal, even when the bike eventually gets inspected. As long as they are not sporting a multimeter I want to be able to pass initial muster.
As for battery choices I'm definitely open to suggestions. Choosing 12V batteries over individual cells reduces the number of units I need to worry about to 4. And I must admit that the lure of LiFe Yttrium chemistry is strong. Rock solid stability, superior temperature tolerances and 3-5k cycles is just dreamy. 'Tis a shame I cant find any as small as 20Ah.
This is REALLY IMPORTANT. Whatever other motors people recomend, you want to choose the slower version of it.
.. 9 continent 2812 dd motor...stokemonkey type drive... grin cyclery...
Agreed on winding type. Slow with lots of torque is the name of the game for tractor pulling.
And cheers on the motor suggestions. I'll take a gander and see if I can find some hard data on how they perform.
I'm hesitant about using a rear hub. The frame is 47 years old and was originally built as a fixie using moped parts. I have added an SRAM internal gear hub with coaster brake and that will serve me well for the speeds I intend to cover. I need to figure out if I can add roller brakes to that. If not I might change to an internal geared hub that can do disc brakes.
as for ebikes.ca I have every intent to give them some business. As a numbers guy the analogger+GPS is too good to pass up. I might also give the veloamp a whirl. Depends on the W.A.F. come january methinks
(even though the veloamp does not help stealth at all)
I'll get back to you Kmxtornado
. It is time to get the runt in bed