RolluS said:Any idea how I could attach a sprocket on a 55 mm hub please?
I'd really want to ruin this motor because I cannot find any alternative. DD hub won't fit, mid drive is the only solution I see...
RolluS said:I was thinking about hub sprocket adapter like those we can find on 80cc gasser conversion
Can it be used with a thin 9 speed chain please?
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RolluS said:Thank you @robocam, nice find!
I ave all my setup for 60~72V (controller, bms, LiPos, etc..)
These kits does not exist for these voltage level. This is what's brang me in this thread.
Skaiwerd said:RolluS
Doesn't look right for the money. No mention of self balancing, regen braking, phone app/control etc. I'd try making one first, riding it would be a different story.
RolluS said:Yep.
This thing is 84V, check specs: http://www.ebay.com/itm/Gotway-Monster-22inch-fastest-electric-unicycle-scooter-/332057007375
Maybe I'll need a wheelie bar :lol:
I plan to use a throttle limiter based on gyroscope/accelerometer/ultrasound
RolluS said:Ok guys, you may have convinced me.
I've already bought the cyclone. Is there a close alternative, with half the power?
Here is a 3000w scooter: https://youtu.be/CyU8Cso6ERM
3000W is about 4HP. That will be 25Kg per HP.
@robocam, for sure I will have a body armor for testing (like motocross riders)
RolluS said:Yep.
This thing is 84V, check specs: http://www.ebay.com/itm/Gotway-Monster-22inch-fastest-electric-unicycle-scooter-/332057007375
Maybe I'll need a wheelie bar :lol:
I plan to use a throttle limiter based on gyroscope/accelerometer/ultrasound
gman1971 said:I am still wondering why not go with a regular 2 speed hub? or the alternative motor that Robocam showed you earlier?
G.
gman1971 said:That seems a bit expensive.... and while it has 1800W it seems like its integrated on the device and somehow built to take into account 1800W...
RolluS said:gman1971 said:That seems a bit expensive.... and while it has 1800W it seems like its integrated on the device and somehow built to take into account 1800W...
It is, electric unicycle are expensive, specially Gotway, for what it is, but you must try and learn to appreciate, that's an awesome vehicle.
I couldn't find anything to bite c3w in terms of requirements for my build. The power is twice too much and maybe dangerous I agree, but voltage, speed, is just what I need.
RolluS said:gman1971 said:I am still wondering why not go with a regular 2 speed hub? or the alternative motor that Robocam showed you earlier?
G.
G., Thanks for your interest.
I would really like a little 500~1500W motor like the one shown by Robocam. If only I could find one that handle 16 to 20S, because that's my battery/BMS setup now.
Hub motor has been tried but because the axle length is really short, it won't fit unless I find a 75mm hub motor.
RolluS said:Really nice!
6.5kW is awesome.
I like the way they are both build, congrats.
dirkdiggler said:Gman -
Do you have a vid or pics of your shunt mod on the controller? Just wanted some more amps! I did just buy a Kelly kls7230s to use on the cyclone, but until it arrives....
I've loved the 3kw cyclones so much I'm toying with getting the 7.5 motor for my Enduro build.
DingusMcGee said:The Low Tech Solution:
This project was one way of adapting the big Cyclone BB steel rings 48T, 44T and 36T to make an all steel ring cassette with quite large steel rings. These Cyclone BB rings can be purchased either from Luna Cycle or Sick Bike Parts and have the 4 hole 104mm BCD pattern. The process requires no lathe work or centering jigs for centering because of a serendipitous fit [almost] of the 26T chainring from a SRAM cluster to the 104mm bolt pattern of the Cyclone rings. The 26 tooth cog with some round file milling back forth between 2 diametrically opposite chain tooth spaces that almost fit the bolt pattern of the big chain wheel can be fitted as a very accurate centering job if a 10mm or 5/16" diameter bolt is moved into the hole you are not filling. Take about 10 files strokes and then move the stabilizing bolt to the other hole and begin filing the opposite open hole for 10 strokes. Repeat until the bolts pass thru the assembly easily.
Two of these 26T cogs were placed one between the 48T - 44T steel BB rings and the other between the 44T - 36T rings. After pushing two bolts thur these two holes the teeth projecting into the other two 104 BCD holes were milled with an 1/8" milling tool in a dremel tool. The 26T rings also act as spacers between these chainrings. You will need some cassettes to take apart to get the cogs you need for fitting and those you will want for the final cog pattern [new].
It turns out that a 13T cog just fits inside the 2.13" hole of the big steel rings. Two of the 13T cogs will aid in centering the cassette when building the set of cogs and spacers to the lock nut. The use of a shimano cassette carrier sleeve bearing will stabilized the cog assembly considerably. You most likely will need one 13T cog placed at innermost position on the carrier [before the 48T ring] to stabilize the flexing of the 2 26T cogs. This will reduce your gear space by one gear and likely result in a steel six speed cassette [ the 13t 12t and 11 t would not fit very well with the spacing I left ] that you must use with friction shifters to meet the less than uniform chainring spacing pattern.
I plan on adding three 1/4" diameter bolts placed thru the arms of the two 26 cogs and thru the 3 large chain rings to make the cassette assembly have a considerably higher torque deformation resistance.
The cassette unit shifts fine both up and down. I have not got the edirtbike to the trails yet but likely no more bent big ring high $$ cassette failures occurring?
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