Search found 1773 matches

by sn0wchyld
May 06 2021 11:49pm
Forum: Items for Sale - New
Topic: Li-ion 60v58ah for Sur Ron x
Replies: 21
Views: 1151

Re: Li-ion 60v58ah for Sur Ron x

noneedlessnoise wrote:
May 06 2021 1:06pm
what do you mean 18/13kw? Need to know continuous/maximum amp discharge.
p=ir :P :wink:

knowing actual limit is usefull but you can get good ballparks
by sn0wchyld
May 03 2021 2:33pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 911

Re: Do some motors have more/less torque with the same power levels?

Basic electronics tells us that winding counts will impact torque and voltage constants. Voltage Constant isn't the battery voltage its the voltage level a motor produces over a given RPM range. Torque Constant is the amperage required to produce a given level of torque. Both are generally linear C...
by sn0wchyld
May 03 2021 10:51am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 911

Re: Do some motors have more/less torque with the same power levels?

I'm shopping for a new motor and I'm quite confused on the amount of torque a motor has. In my case, my old motor was a mini cyclone or cyclone 1680w and I'm looking to upgrade to the 3 kw cyclone. I keep hearing that the cyclone 3000 has a lot more torque. If I use the same power motor controller ...
by sn0wchyld
Apr 05 2021 4:59pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

@sn0wchyld do you have an update for us :) Aside for any new feedback you may have using the bike, I was wondering about the following. 1. From your last remarks on cutoff brakes, For the cutout issue I'm going to chat to the guys about adding it in for the pedal modes, I have some MT5E's so gettin...
by sn0wchyld
Mar 14 2021 9:36am
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

cheers for the links mate, will check them out and find the exact taper. too bad you cant get slightly negative taper, loosing 5mm or so would be damn near perfect and solve all issues in that area I doubt they makes negative cranks... for that you could talk to a CNC shop and have them make a cust...
by sn0wchyld
Mar 13 2021 5:53pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

Thanks a lot for keeping up with me! I agree that for me the one thing that would make the bike the perfect hybrid between a light motorcyle and an EMTB you can actually pedal would be to add a Torque sensor. You should mention it to them, as the more people do, the more chances they would consider...
by sn0wchyld
Mar 13 2021 5:48pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

the power dissipated from the battery IR is the product of current AND voltage: P = I × V Your calculations based on Amps only, are giving equal losses because you didn’t account for the voltage differences between the 2 batteries. Read my last response but put simply, yes and no. P=IV yes, but for...
by sn0wchyld
Mar 13 2021 5:46pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

The reason is that Ohm law says: Impedance does add in a series, and divides in parallel. The longer series using the same number of cells will make a battery that has higher impedance, thus lower C-rate, thus will produce more heat supplying the same watts. The logic of battery performance is that...
by sn0wchyld
Mar 13 2021 2:09pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

let me know if you want more precise measurments (all these are like +-10mm, just done quickly before tea) 1. its enough that it'd be a pain on a steep hill if stopped. requires about a 1/4 to half turn of the pedals. seems more responsive once your moving, but that could just be the 'ease' of getti...
by sn0wchyld
Mar 13 2021 10:04am
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

The reason is that Ohm law says: Impedance does add in a series, and divides in parallel. The longer series using the same number of cells will make a battery that has higher impedance, thus lower C-rate, thus will produce more heat supplying the same watts. The logic of battery performance is that...
by sn0wchyld
Mar 13 2021 9:38am
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

I was looking at the battery specifications on the BoxxBike, and I was wondering if battery experts care to comment on why they may have chosen the 12S-12P (144cells) configuration, rather than a 16S-9P (also 144 cells) configuration. The Sony VTC6 cells they use have specs that vary depending wher...
by sn0wchyld
Feb 27 2021 6:32pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

The method of reading the power applied to the crank is not an issue. There are many reliable, instant power monitoring devices today. The difference is in the controller software, because it is not where the info is coming from, but how it is treated and transformed into an intuitive result by the...
by sn0wchyld
Feb 27 2021 6:31pm
Forum: EBike General Discussion
Topic: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive
Replies: 80
Views: 5809

Re: Boxxbike Valkyrie : 12kw crank concentric mid drive with left hand motor drive

scrambler wrote:
Feb 26 2021 8:10pm
Anyone has its hands on the new Boxxbike and can report ?
Ill be able to report something in the next week or 2... ;)
by sn0wchyld
Dec 05 2020 6:22am
Forum: EBike Build Threads
Topic: Neematic - 20kW middrive bike
Replies: 268
Views: 56073

Re: Neematic - 20kW middrive bike

Mailed UBCO (europe-Justin) today as this story is going on & on for a FRX1 .. I like this thing and thought i'd give them aother shout.. :roll: .. I got a response within an hour of mailing.. "we expect to start the production next year".. How long can I wait lol I want a mid drive p...
by sn0wchyld
Nov 09 2020 2:54pm
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5486
Views: 630124

Re: Sur-Ron - New Mid drive Bike

Here is the test results from ASI. Surron Dyno Run 2018-11-26 (1).xlsx does anyone know if this was with the older 'golden motor' or the more recent 'surron' motor? or have a more recent run? been hunting for the kv/kt numbers on this motor for ages, and the stock controller phase amps. .cheers.
by sn0wchyld
Oct 28 2020 10:01am
Forum: Items for Sale - Used
Topic: LMX 161h and MX demo bikes
Replies: 3
Views: 562

Re: LMX 161h and MX demo bikes

Selling two 2017-2018 LMX 161 bikes, due to renewal of our test bikes with 2021 bikes. The H version has a fastace inverted fork, DNM shock, TRP brakes, and has a COC (street legal). Battery is 27AH usable 30Q. ES price : 5200€ shipped in EU. French customers can get 500€ off as the bike was never ...
by sn0wchyld
Oct 27 2020 5:02am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5486
Views: 630124

Re: Sur-Ron - New Mid drive Bike

At the risk of starting another thumb throttle argument, I'd like a little advice on the subject. In general, I love how easy I can control the sur-ron through very rough terrain. The only thing that bugs me sometimes is the throttle sensitivity in certain situations. As I mentioned earlier, I was ...
by sn0wchyld
Oct 12 2020 11:57am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5486
Views: 630124

Re: Sur-Ron - New Mid drive Bike

Waiting listed for a Nuc 24f since January so hopefully that starts moving soon :D I signed up for a nuc controller on Mar3, glad to see I'm not the only customer forgotten by those guys. Orlov & most of the other Easterners have moved on from nuc so I have now given up ever getting one & I...
by sn0wchyld
Sep 23 2020 8:37am
Forum: Items for Sale - New
Topic: 20Ah li-on NMC cells UK London new boxed £12 each on box of 50 limited stock
Replies: 156
Views: 22124

Re: 20Ah li-on NMC cells UK London new boxed £11 each on box of 50 limited stock

Eig co20b 20 ah cells boxed and sealed 3.7v screw terminals Energy innovation group high quality li-nmc South Korean cells I have several hundred for sale all are boxed pm message me if you are interested £11a cell on 50 cells 5c continuous rated 10c bursts http://imgur.com/gallery/lo8jgaO http://i...
by sn0wchyld
Sep 11 2020 7:23am
Forum: EScooters/EMotorcycles
Topic: SURRON LB: RESEARCH & DEVELOPEMENT
Replies: 260
Views: 38672

Re: SURRON LB: RESEARCH & DEVELOPEMENT

Wow. So I'm a little late to the party with all the stuff I wanted to do on with Surron but eh...that's life. So I ended up finishing the full CAD model this spring. Here's a glimpse on my GC portfolio. The full file package is the COMPLETE bike, even connectors :) 500+ hours of work. Blood sweat a...
by sn0wchyld
Aug 08 2020 5:23am
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5486
Views: 630124

Re: Sur-Ron - New Mid drive Bike

Highest I could get the motor was 72C-74C. It mostly stayed around 65C-70C. This is with 88F outside air. This is also using 90 amps x battery voltage with a Nuclear 24 fet controller. I checked the case temp with an infared thermometer, when the temp was 65C inside the motor measured by the temp p...
by sn0wchyld
Aug 08 2020 5:21am
Forum: Motor Technology
Topic: Surron Motor tuning with datalogs! FOC experts needed
Replies: 11
Views: 874

Re: Surron Motor tuning with datalogs! FOC experts needed

I realised I never posted an update here - vasiliy released new firmware based on mine and others feedback which completely resolved the non linear behaviour and now this thing RIPS. Still on 16s stock battery with a parallel booster pack from old 30qs, now hits 16.2kw on a daily basis. Power does ...
by sn0wchyld
Aug 08 2020 5:21am
Forum: Motor Technology
Topic: Surron Motor tuning with datalogs! FOC experts needed
Replies: 11
Views: 874

Re: Surron Motor tuning with datalogs! FOC experts needed

I realised I never posted an update here - vasiliy released new firmware based on mine and others feedback which completely resolved the non linear behaviour and now this thing RIPS. Still on 16s stock battery with a parallel booster pack from old 30qs, now hits 16.2kw on a daily basis. Power does ...
by sn0wchyld
Aug 01 2020 9:19pm
Forum: EScooters/EMotorcycles
Topic: Sur-Ron - New Mid drive Bike
Replies: 5486
Views: 630124

Re: Sur-Ron - New Mid drive Bike

Finally rode my bike with the new KTY 84 temp probe. Highest I could get the motor was 72C-74C. It mostly stayed around 65C-70C. This is with 88F outside air. This is also using 90 amps x battery voltage with a Nuclear 24 fet controller. I checked the case temp with an infared thermometer, when the...