marcexec wrote:Tested that for you:
CA says Amax 8.25A without belt, 10.25A with, driving the whole assembly (minus front sprocket and what comes after)
The motor has the skirt bearing and the can is not 100% true either.
I might get some optimization with Burtie's TA still.
And also be aware that single cylinder motors are often side-split (hassle), while multi-cylinder are horizontally split. The old Yamaha 2 stroke electric start models have a HUGE space at the end of the crankshaft where the brushed generator/starter and ignition plate are housed. I think the armature weighs about 5 lbs.marcexec wrote:In retrospect, I would advise using a transmission that's sealed more easily like shaft drive or 2-stroke.
I will have more updates soon.
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live peak max RPM bypass 9.95 +15/0/0 ~8 9.60 5966 +10/0/0 ~8 9.00 5891 +10/-15/5000 ~8.4 10.09 6107 +10/-20/5000 ~8.5 9.89 6233 +10/-25/5000 ~9 9.80 6454 +10/-30/5000 ~13 13.03 7086 +5/0/0 9.48 5882 0/0/0 9.5 5819 -5/0/0 9.78 5927 -10/0/0 11.33 6131
Great to hear you have this moving now, Skirt bearings are a pain they also restrict air flow through the motor as well as getting hot.. If you remove the skirt bearing then you can also cut off the 8mm of outrunner can that is not needed, it all helps keeping this cool.marcexec wrote:So, drove it for the first few kilometers through the neigbourhood. Motor gets warm at the skirt bearing - most likely because because it's revving quite high in 1st gear, will remove that.
Also added the CA in the meantime, after building a custom bracket:
Test setting: 72V 14Ah LA test pack, controller at 35 A(batt), TA not fitted atm (no case) + sticky front brakes
quite zippy when accelerating fresh off the charger, need to add more batteries obviously - 2.5C is too much for the small, (discarded) SLAs
Good to see you have movement, you should try Alliexpress or Alibaba for your batteries. That's what I did, fifty Lipo batteries, 5000mAh, 18.5V for $23 each plus shipping and import tax. Equivalent Turnigy ones from Hobby King cost $46.marcexec wrote:Some more progress:
- added another string of 6 SLAs for a total of 72V / 28AH in a lower battery box
- did a quick beta test and took her out for a ride: the SLAs sag like hell, but I can get to ~50 km/h and the CA sees around 2kW
I can make a video if you guys want to see it...
great build! with leaf lithium it will be a killer: i had a bandit 400 ... gasmarcexec wrote: I went and measured the space "around" the gearbox assembly and pulled the trigger on 12 Nissan Leaf / Renault Fluence battery modules. Source: http://hybridautocenter.com/HAC4/index. ... Itemid=605.
That should yield ~6kWh and nearly 22kW constant power. Will have to re-tune for the higher voltage then
I should be able to mount them in 2 or 3 blocks and get some space under the tank for storage.
thanx for the info! would you be so kind to tell me the courier you choose for shipping and themarcexec wrote:Discussed a little over at BVS (was originally looking for a share of a salvage one but not worth it):
http://www.batteryvehiclesociety.org.uk ... f=3&t=3709
12 modules: ~1200€ at my door, no customs so far - 1 out of 3 to go.
BTW, a stack of 4 come in at ~135mm gross height as they stack into each other a little, maybe 2mm each.