As said earlier, you are over geared and over weight. You should be getting at least 1 mile an 1AH. Since the AH capacity is low that will also cause more strain on the batteries.
I just hope you realize that we are not trying to burn you down,
Overweight yes, overgeared no. The Currie is geared perfect. That is the bike I ran last night.
I ran the old 8.0 LiPo pack down. On the way back I ran the two Sona packs. The 6S LiPo pack reads 3.77 to 3.81 volts. The SONA packs read 37.5 volts before I put them on the charger. I am about to charge the LiPo pack with a window open just in case.
I know why DA likes Currie e bikes. they ride like a dream. Very comfortable with my oversized seat. Mine is going on five years old and has it's third motor. It started with a 450 watt 24V overgeared to 36 volts and 675 watts. Then it got a 48V 1,000 watt Unite motor but only ran it at 36 volts and 750 watts and now has a 750 watt 480 rpm gear reduction motor.
That sprocket calculater is right on the money. Also Dan. those were your old packs powering the Currie in that video. They read 50 volts with the multimeter and I don't see much sag there as 48 volts = 28 mph with that gearing. It just hits it for a split second towards the end of the video.
Yesterday on the way home it had no problem with the hills and the 36 volt packs are a perfect match for the one horsepower 36 volt 750 watt motor and at 480 rpm gearing is 20 mph. What was DAs bike geared for. 20 mph at 700 watts ?
My most impressive, recent, upgrade was over volting (24V≫37V) my eZip (Snow Beast) then gearing it down (20T≫22T) for a 700w+ 20mph+.
Legal 20mph, when battery low, and near legal 750w limit. (36≫37V increases to 732w motor output!)
My 24" Cargo bike with the 800 watt motor DA refered to it as the heavy hauled when I got that motor. It is geared low as it is a 20" wheel with an 800 watt hub motor. The Currie and the 24" cargo bike is the only two bikes I have been running.
The 20" dual motor cargo bike have 500 watts in the rear and 533 watts in the front for a total of 1,033 watts with 20 mph gearing.
The Schwinn has the broken spoke so is off the road. The torque arms removed and on the back of the 24" cargo bike with the 800 watt hub motor.
The 60 tooth spoke sprocket on the 20" wheel is only slightly overgeared. With the 1,000 watt 48 volt unite motor on a 20" wheel I did a video before the one with the Currie and hit 29 mph on the flat with the old 24" cargo bike also with the old packs. I scrapped the bike frame because it was bent from a hammer.
The gearing on that with a 20" wheel is 32.5 mph at 1,000 watts and 3,000 rpms. 24.5 mph at 750 watts and 2,250 rpms (above the bottom pic). That was and will be again my highest geared bike but still makes small hills with no problem. It went up Congress st. hill with three SLAs. I posted a picture of the alligater clips which were smoking bad and almost burnt a hole in the SLAs.
Well It looks like I might as well order one of those snap togeather kits and a BMS. Thanks.
https://www.ebay.com/itm/10-50V-100A-30 ... 0677.m4598
https://www.ebay.com/itm/Imperial-Elect ... SwAWlaVijZ
getting some money soon.
It is difficult to believe that nobody is using these Imperial electric motors for e bike builds. Common on the internet for about a year now. It is hard to find such a motor with the perfect rpms for a 40 tooth sprocket on the wheel and 11 tooth for the motor.
One of the reasons why I did not order sooner is the lack of 36 volt batteries. Now I have them and will order more .
Nobody seems to know if there is a motor sprocket for it though. It makes me go Hmmmm. possibly because you all think I will get seriouslly hurt at 45 mph. I know how to ride a bike and where to do 45 mph without incident. I am smarter than the average bear.
Please let me know. Thanks.
I build e bikes. There not always pretty or practical but sometimes they work, at least for awhile. Immortality is not a dream but the future of our evolution. We were given the tools to forge our own destiny. We were created in gods image and shall evolve to live forever.