New freeride project - LMX P1
- Thread starter bzhwindtalker
- Start date
bzhwindtalker
100 kW
We are back from our roadtrip, the bike worked great with no major mechanical issues, but I will have to change the drivetrain to karting chain I think because I broke my bmx chain a lot of times !
I'm not yet fully used to this bike and I can't get 200m wheelies like on my blue FR but getting those on the Lapierre took me months and I only stared riding this bike a few weeks back. The bike jumps well but my rear shock does not have rebound control wich makes landings quite bouncy.
Meeting with christer was a lot of fun an i was impressed by the performance of the GNG motor on 100v, it screams like crasy and has a power/weigth/price/efficiency ratio you just can't beat
The video should be out by the end of august and it should be pretty good with all the cool footage we have!
I'm not yet fully used to this bike and I can't get 200m wheelies like on my blue FR but getting those on the Lapierre took me months and I only stared riding this bike a few weeks back. The bike jumps well but my rear shock does not have rebound control wich makes landings quite bouncy.
Meeting with christer was a lot of fun an i was impressed by the performance of the GNG motor on 100v, it screams like crasy and has a power/weigth/price/efficiency ratio you just can't beat
The video should be out by the end of august and it should be pretty good with all the cool footage we have!
christerljung
100 W
I'm glad to hear you made it all the way back to France.
Never had so much ebike fun in such a short time as i did under your visit. (one broken fork, three blasted controllers, a snapped jackshaft and an injured hand)
We must have a europé off-road meeting for all ES-members soon.
Never had so much ebike fun in such a short time as i did under your visit. (one broken fork, three blasted controllers, a snapped jackshaft and an injured hand)
We must have a europé off-road meeting for all ES-members soon.
waynebergman
100 kW
For those of us having to put are bikes on a commercial flight most bikes would arrive with a longer list of broken parts then Christerljung's just from the flight over there. hehe. A huge group ride would sure be fun though.
bzhwindtalker
100 kW
Here is the Trailer! Editing the full movie will take a while but here is a preview of what to expect ! Sorry the music is hitting a bit hard haha
[youtube]_kJIBchSoe0[/youtube]
Adam
[youtube]_kJIBchSoe0[/youtube]
Adam
jansevr
1 kW
great work - i would say it is your best video and really good editing too! the bike looks like an absolute blast to ride and i'm sure building it ALL yourself only makes it that much better 
. can't wait for the full video!
. can't wait for the full video!
crossbreak
1 MW
looks like this concept has future très bien!
Hope I get a such a nice shot of my own bike some time... my girlfriend is a photograph
very nice placements in the vid Vachement cool!
I saw that vid of the guy who installed a Clyte 3540 middrive in a bike, running it through derailleur... that was fail indeed, to much power for not enough teeth.
But your setup has low end torque due reduction... and high speed due high voltage. If you keep the limits of you motor, it will even be quite efficient. What reduction do you use? looks like ~2.5:1? Talked about this recently. Whip is also building something very similar, but with much more powerfull motor... lets see how that performs 8)
For my calcs, 2:1 is best for such a setup... more costs too much efficiency... 1:1 has 100km/h max in a 26" rim, so 2:1 is prefect for 50km/h. What no load current do you see? did you terminate your motor in Delta for more speed? [EDIT] ok you did a delta mod, very nice my hs3540 is also delta and sensorless which controller do you use? 18Fet greentime?
très bien! Hope I get a such a nice shot of my own bike some time... my girlfriend is a photograph
very nice placements in the vid Vachement cool!I saw that vid of the guy who installed a Clyte 3540 middrive in a bike, running it through derailleur... that was fail indeed, to much power for not enough teeth.
But your setup has low end torque due reduction... and high speed due high voltage. If you keep the limits of you motor, it will even be quite efficient. What reduction do you use? looks like ~2.5:1? Talked about this recently. Whip is also building something very similar, but with much more powerfull motor... lets see how that performs 8)
For my calcs, 2:1 is best for such a setup... more costs too much efficiency... 1:1 has 100km/h max in a 26" rim, so 2:1 is prefect for 50km/h. What no load current do you see? did you terminate your motor in Delta for more speed? [EDIT] ok you did a delta mod, very nice
my hs3540 is also delta and sensorless which controller do you use? 18Fet greentime?
bzhwindtalker
100 kW
I use 15-38t and get a top speed around 50-55k but l only charged to 4v per cell. The controller is a cheap hua tong 15 fet and it blown a fet driver when I went over 80v, we replaced it with Christer but then I did not try it again over 80v.
I think I may get one of those sin wave sabvoton units to try out but I really like the current controller placement and anything bigger would not fit. But again I should find a better throttle or a way to have a more progressive curve! I really liked the finish and quality of the magura on Christer's bike so that's on the wish list
When I'll get the chain drive and the throttle control sorted, there won't be much to hold me back!
I think I may get one of those sin wave sabvoton units to try out but I really like the current controller placement and anything bigger would not fit. But again I should find a better throttle or a way to have a more progressive curve! I really liked the finish and quality of the magura on Christer's bike so that's on the wish list
When I'll get the chain drive and the throttle control sorted, there won't be much to hold me back!
crossbreak
1 MW
Be aware that the sabvaton has only 10.000 e-rpm (i think). You should gather info about the pole count of your motor, than you can easily calc how fast you can spin it maximum. A real torque throttle controller is worth a lot, everything else is crab IMO, go for it!
dan974
1 kW
speedmd
10 MW
Dame it! I need to go 24s now. 
You guys really suck showing me this stuff. :lol: :lol:
You guys really suck showing me this stuff. :lol: :lol:
christerljung
100 W
crossbreak
1 MW
i'd like to see christers bike on a test bench... my guess, it's not even close to 3000W a nice machine anyway
speedmd
10 MW
Hi Crossbreak.
Get one and check it out. Will not be a waste, I can assure you of that. It is a impressive performing little motor, and I am only running 12s. I would like to see its results from a good bench lashing as I am leaning toward a second build with another one if I can get the upgrades I am looking for.
Get one and check it out. Will not be a waste, I can assure you of that. It is a impressive performing little motor, and I am only running 12s. I would like to see its results from a good bench lashing as I am leaning toward a second build with another one if I can get the upgrades I am looking for.
bzhwindtalker
100 kW
Crossbreak do you have the tools to truly test this motor? I don't use mine any more so if you have the tools I could send it to you for advanced tests (I'm in france so shipping should be fair)
Just sayin'
BTW we need to find a source for those motors, we don't need the GNG crap now that LR does nice lower sheets (they are the only really interesting part besides the motor on the original GNG kit)
Just sayin'
BTW we need to find a source for those motors, we don't need the GNG crap now that LR does nice lower sheets (they are the only really interesting part besides the motor on the original GNG kit)
speedmd
10 MW
LR was talking about putting together a 20 unit buy. I put it in the GNG thread/his head that I wanted two with a temp sensor, high temp wire insulation and magnets, and fatter phase wire. I will up my quantity if it takes that to get some special ones made. It is the right physical size for most bikes and does not seem to burn up easy.
dan974
1 kW
I could go for one :wink:
If you are looking for a controller with torque throttle I've been quite impressed with the Kelly kbs48101L I've got. It's small as a 6 fet controller, got synchronous rectification, current measurement on all three phases (to save the FETs) etc. though these small controllers are 48V (60V max). If programmed to max settings it's able to take 4500W out from a 12s lipo setup for 10sec and will then dial down the current to the controllers marked max current (35A) for this one.
http://kellycontroller.com/kbs48101l35a24-48v-mini-brushless-dc-controller-p-1171.html
http://kellycontroller.com/kbs48101l35a24-48v-mini-brushless-dc-controller-p-1171.html
bzhwindtalker
100 kW
Yep this one looks like it would work : http://kellycontroller.com/kbs72121l50a24-72v-mini-brushless-dc-controller-p-1175.html
120A peak/50A continuous sounds good to me, but is that phase or battery current?
Gab, the Stock GNG is quite silent but the combinaison of 100v and #25 chain mod makes it sound like most RC drives.
120A peak/50A continuous sounds good to me, but is that phase or battery current?
Gab, the Stock GNG is quite silent but the combinaison of 100v and #25 chain mod makes it sound like most RC drives.
2moto
100 W
bose said:
I've tried a couple of those Kelly mini controllers, including that one and the next one up, and am not very impressed. The torque control is not great, and their current ratings have not shown to meet their claims either. They are cheap, they do work, but don't expect good torque control.
I must admit that I have not used it extensively but I am so far impressed compared to the em3ev "Infineon" 6 fet. Did you reprogram it to remove the throttle delay that is set from the factory? And regarding the current claims, was it the 35A limit it wasn't able to sustain?
I'm going to do some logging when I get my speedict.
I'm going to do some logging when I get my speedict.
2moto
100 W
Yes, I am pretty certain I set it up to its optimum. In my experience it was neither capable of sustaining the continuous nor the peak current. I tried the next large size (current wise) and experienced much the same. I'd be very interested in your data, though.
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