Ken Taylor
100 W
Always interesting to see something different tried. Hopefully you will publish your build as it progresses.Deeze said:I can see no issue with the frame for road use / light off road at all.
Always interesting to see something different tried. Hopefully you will publish your build as it progresses.Deeze said:I can see no issue with the frame for road use / light off road at all.
tonyontopofabighill said:This bike has now been reduced to $400
http://www.ebay.com.au/itm/Aprilia-Enjoy-Racing-electric-Bicycle-/321358194425?pt=LH_DefaultDomain_15&hash=item4ad270e6f9&_uhb=1
drekkus said:tonyontopofabighill said:This bike has now been reduced to $400
http://www.ebay.com.au/itm/Aprilia-Enjoy-Racing-electric-Bicycle-/321358194425?pt=LH_DefaultDomain_15&hash=item4ad270e6f9&_uhb=1
Looks like it still didn't sell and has been relisted again for the same price.
http://www.ebay.com.au/itm/Aprilia-Enjoy-Racing-electric-Bicycle/321364632202?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222006%26algo%3DSIC.FITP%26ao%3D1%26asc%3D20140107090050%26meid%3D5871363625925391713%26pid%3D100011%26prg%3D20140107090050%26rk%3D4%26rkt%3D10%26sd%3D321358194425
Seems I might be in need of a new charger as mine seems to be screwing around with the balance. One cell keeps fluctuating on the charger on both battery packs but testing shows the cell as a lot higher ie charger shows as low as 2.8v but two other testers shows 4.29v.
tonyontopofabighill said:drekkus said:tonyontopofabighill said:This bike has now been reduced to $400
http://www.ebay.com.au/itm/Aprilia-Enjoy-Racing-electric-Bicycle-/321358194425?pt=LH_DefaultDomain_15&hash=item4ad270e6f9&_uhb=1
Looks like it still didn't sell and has been relisted again for the same price.
http://www.ebay.com.au/itm/Aprilia-Enjoy-Racing-electric-Bicycle/321364632202?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222006%26algo%3DSIC.FITP%26ao%3D1%26asc%3D20140107090050%26meid%3D5871363625925391713%26pid%3D100011%26prg%3D20140107090050%26rk%3D4%26rkt%3D10%26sd%3D321358194425
Seems I might be in need of a new charger as mine seems to be screwing around with the balance. One cell keeps fluctuating on the charger on both battery packs but testing shows the cell as a lot higher ie charger shows as low as 2.8v but two other testers shows 4.29v.
I have got the same problem. Have you got an Accucel 8 ?
Ken Taylor said:Always interesting to see something different tried. Hopefully you will publish your build as it progresses.Deeze said:I can see no issue with the frame for road use / light off road at all.
tonyontopofabighill said:Just out of curiosity did you get it from Collaroy in Sydney?
I haven't ridden it fast enough to test high speed cut out but it must be cadence rather than speed dependant as there is no speed sensor.tonyontopofabighill said:I started off with 2 Aprilias with the standard setup and rode them both for about 2/3 years.I remember the motor would cut out when I got to 25klms per hour (I think)
That is different to Hillhater's description and this bike so far. It is making me wonder again if the controller is faulty. The guy selling it understood the behaviour and said it was fine. For this bike, if the power cut out when pedalling hard it came back on for a second if I stopped pedalling. If power went off and I kept pedalling, but eased up, it came back on and remained on until I pedalled too hard again. I was sure it was a fault until I read the manual. I couldn't perceive that assist was varying with pedal effort but the torque sensor was definitely working because it could sense when I was pushing hard. I've only tried it for 10 mins so far so I need to test it more.tonyontopofabighill said:and if was going up a really steep hill the buzzer would beep and the power would cut out. All I had to do in this situation was turn the ignition off and then immeediately back on and I would be able to keep going.
I found it annoying but got used to it.
This I tested by locking the rear wheel and using a 20 amp/75 mv shunt and standing on the pedal. I measured a huge 71.6 amps which dropped the battery voltage to 18 V so that is a frightening 1.3KW. Frightening because that heat was being absorbed by one motor winding and the controller. Even the shunt warmed up which might have affected it's accuracy. After a while I felt regular pulses through the pedal as the torque changed, presumably as an over current sensor, temperature sensor or timer kicks in and out. I only tried it for a few seconds. This probably wouldn't happen in use as the bike would move with the rider standing on the pedal unless the brake is applied and this disables the motor. I wasn't game to keep investigating, to measure the change in current with change in torque, as it seemed likely I would cook the motor.Hillhater said:If you have the chance /tools,...it would be nice to know what the max amperage the standard controller limited at. ( 10 A ?)
I've measured mine now and it managed 8.4AH. It is a nominal 13AH new so that isn't too bad either.DCMotorworks said:It looks to be very lightly used. to my surprise the original battery pack took a charge and seems to be fairly strong.
I'll try that. Perhaps I should do some before and after power measurements.DCMotorworks said:it was kind of an underwhelming ride until I clipped the speed limiter wire.
I wouldn't be wanting assist if I was going that fast.DCMotorworks said:...but feeling the motor assist while pedaling down a slight incline at 27mph is a lot nicer than it was before.
That is fast. I couldn't do that. I managed 19.1 km/h (11.9 mph) over a 28 km section while contributing an average 184 watts of human power. I'm faster on an unpowered bike.DCMotorworks said:... last night I was still able to cover a little over 11 miles while averaging around 20mph.
Not for me. Interesting that you are having a different experience. It makes me suspect again that mine is somehow faulty, despite the sensors testing OK, or maybe it is the effect of the non clipped wire.DCMotorworks said:... and the pedal assist power becomes predictable and useful.
Same, if I pause pedalling while shifting.DCMotorworks said:it always powers up from a dead stop, and up-shifting,
No and no for me.DCMotorworks said:hill climbing or just pedaling hard always produces a burst of power.
It powers the torque and cadence sensors. I think that's all.DCMotorworks said:... I'll install a 24v to 12v / dc to dc converter to supply the 12v to the controller or sensors or what ever is going on with that.
During the stall test, I conducted it pulled more than that. The BMS I use doesn't cut out but limits the maximum current draw. If yours is the same, I'd expect 20 amps is plenty.DCMotorworks said:the lifepo4 bms is limited to 20 amps so if the Aprilia pulls more than that on steep hills or at start up acceleration in the highest power mode
Interesting to follow your build. That battery box is huge, what are you putting in there? It looks to be welded all the way along so should stiffen the frame.Deeze said:Mine is having a makeover.
Yes it was. $400 was the best I could manage but I was keen as I suspect my original is approaching end of life. The gearbox sometimes clicks when I first add power and it's gradually happening more.Deeze said:All in all a good buy for $300