Search found 581 matches

by cycleops612
Jan 02 2017 8:38pm
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

re: My 28" city bike goes to 36km/h in H and about 22 in L on no load and 32km/h in H and 20km/h in L (18km/h in climb) @36v. Of course, to achieve this high speed I ordered motors for smaller wheels than the ones I actually have. I was under the impression u could opt for different gearing on geare...
by cycleops612
Jan 01 2017 1:35pm
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

Yes Sam, I agree. I would advise anyone to only use this motor if you are happy with rim-brakes / V-brakes...it was not designed to work with a disc, and so many customers demanded that feature that the company slapped it on, but...the disc version adds to the width. Then again, I am quite happy wi...
by cycleops612
Dec 31 2016 11:54am
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

Probably a silly suggestion, but maybe hold the disk brake hard on, and twist on the tire/rim? As I understand it, the disc mounting holes are on the wrong side plate. The black tool a couple of posts above looks like it would work. Using a combination wrench as shown above that levers against the ...
by cycleops612
Dec 31 2016 7:10am
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

Probably a silly suggestion, but maybe hold the disk brake hard on, and twist on the tire/rim?
by cycleops612
Dec 31 2016 12:17am
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

Eric; my advice: 1) Listen to ones who applaud your efforts, not your detractors. 2) Discount completely anything N37 said. 3) Consider contacting d8veh (he still posts on pedelecs, but apparently not here anymore --- can't blame him if he's encountered some of these individuals). 4) Have seen neit...
by cycleops612
Dec 29 2016 5:01pm
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

My application might be anomalous, but many rides in socal are constant ascents for 2,000' - 3,000' followed by flat or downhill. Of course, this is where mid-drives excel, but if I purchase this kit, it will be interesting to see how far it will climb. For my application, manual shift is preferabl...
by cycleops612
Dec 29 2016 12:39pm
Forum: E-Bike General Discussion
Topic: 2 Speed Xiongda hubmotor
Replies: 1596
Views: 211313

Re: 2 Speed Xiongda hubmotor

Is it just me, or is it obvious that ANY non radar~ automatic wont anticipate a hill downshift as well as a person? I can see each mode on the XD having its good points. The issue for most would be, how easy is it to toggle between modes? I imagine the answer is "VERY EASY". If, as users here say, s...
by cycleops612
Dec 27 2016 7:21pm
Forum: E-Bike Technical
Topic: 2WD (Two-Wheel Drive) FAQ
Replies: 217
Views: 52788

Re: 2WD (Two-Wheel Drive) FAQ

An absent important 2WD scenario, is that which dominates the EV car market - the petrol electric hybrid, like Prius only two discrete motors. An example niche would be a rural long ride to town for school/work or errands & some hills. Use the ungeared small petrol motor to cruise, and electric for ...
by cycleops612
Dec 27 2016 7:13am
Forum: Battery Technology
Topic: diamond encased nuclear waste as millenium+ batteries
Replies: 1
Views: 272

diamond encased nuclear waste as millenium+ batteries

http://www.bristol.ac.uk/news/2016/november/diamond-power.html Present practicality aside, it seems an important, new?, fundamental building block component. just as a PV cell transduces light energy directly to electricity, this does from radiation. I guess its not new, whats new is a safe package ...
by cycleops612
Dec 26 2016 10:34am
Forum: Battery Technology
Topic: weight & efficiency dont matter for stationary green storage
Replies: 7
Views: 586

Re: weight & efficiency dont matter for stationary green sto

Weight matters in whatever structure you set up to store those batteries. It also matters when you have your occasional swap out for new ones. Ma gave up on her solar because of the storage is such a struggle. just as it matters with the town water pressure problem. Such water towers have been buil...
by cycleops612
Dec 22 2016 4:04pm
Forum: Battery Technology
Topic: weight & efficiency dont matter for stationary green storage
Replies: 7
Views: 586

Re: weight & efficiency dont matter for stationary green sto

Thanks for the links.impressive. Much of the stored power would be nuclear generated, so this "battery" would provide premium peak/variable demand power like expensive gas turbines. a mountain is an ideal tank stand if available, certainly. Off grid places often have lots of intermittent power but n...
by cycleops612
Dec 22 2016 12:20pm
Forum: Battery Technology
Topic: weight & efficiency dont matter for stationary green storage
Replies: 7
Views: 586

Re: weight & efficiency dont matter for stationary green sto

Battery efficiency does matter for stationary applications: If it was 1% the system would be all but useless. Gravitational potential energy (Joules) = mass x gravity x height Assume attic to basement height of 10m (30ft) & Kingsize water bed 72"x84"x12" = ~1200litres = 1200kg Energy = 1200 x 9.81 ...
by cycleops612
Dec 22 2016 8:17am
Forum: Battery Technology
Topic: weight & efficiency dont matter for stationary green storage
Replies: 7
Views: 586

weight & efficiency dont matter for stationary green storage

Obviously, but it bears repeating, weight is of no consequence for stationary power storage like off grid. Also logically, efficiency harnessing the power is ~irrelevant, if the solar or wind power stored is clean and free anyway. The math doesnt make sense to me I am afraid, but it seems clear, tha...
by cycleops612
Dec 18 2016 9:29am
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 7677

Re: DIY Heated Jacket

Those HP ratings were a legacy for taxation purposes, actual engine power would have been many times that. https://en.wikipedia.org/wiki/Tax_horsepower Interesting. Surreal that a tax regime dictated engine design over function during crucial stages of industry development. And their consequences, ...
by cycleops612
Dec 18 2016 5:03am
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 7677

Re: DIY Heated Jacket

A quaint reference i saw in a ~1950 UK set period novel, was of the devoted father packing hot water bottles in the Jag to pick up his daughter from the village station. Since i am at it, another book mentioned that up to 5 hp (3.65kw~) cars got one rate of petrol ration, and up to 8 hp cars got ano...
by cycleops612
Dec 18 2016 4:02am
Forum: E-Bike General Discussion
Topic: seems a good anti theft bet. AUD$50 datadot kit
Replies: 0
Views: 326

seems a good anti theft bet. AUD$50 datadot kit

http://www.nationalbikeregister.com.au/product/datadotdna-bicycle-kit/ http://www.police.nsw.gov.au/can_you_help_us/crime_stoppers the links relate to australia/NSW. Data dot may have similar initiatives elsewhere. The Oz national registry of bikes is maintained free by datadot allegedly. i wonder h...
by cycleops612
Dec 17 2016 8:01am
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 7677

Re: DIY Heated Jacket

just sayin, the old fashioned concept on insulation works too. :) an odd observation that may help? being a messy etc. guy, as i repeatedly traversed my strewn floor barefoot, there was one patch my foot was instantly warm, strikingly so. it was a piece of ~: https://www.google.com.au/imgres?imgurl=...
by cycleops612
Dec 16 2016 1:36pm
Forum: Battery Technology
Topic: Is my 48v 15Ah LifePo4 battery (from Sun-Thing) healthy?
Replies: 10
Views: 1798

Re: Is my 48v 15Ah LifePo4 battery (from Sun-Thing) healthy?

Hi Guys & Girls, I have a scooter and had SLA's and when it was time to change them, I bought a 48v 15Ah LifePo4 16s battery from Sun Thing @ 2 years ago. I tested it at the beginning and it produced @ 14.5 Ah and seems to balance fairly quickly. My average trips are @ 6-10 kms, and have done a few...
by cycleops612
Dec 15 2016 7:18pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: New Clean Propane Powered Scooter and Fun Kart
Replies: 60
Views: 7826

Re: New Clean Propane Powered Scooter and Fun Kart

Can't legally carry propane under ground/water through tunnels. Can be very tricky getting an RV in/out of NYC and many other major metro areas. And let's not get started about propane BBQ grills on balconies either... ???.. Odd the different authorities concept of risk ? Propane ...NO Guns .....OK...
by cycleops612
Dec 15 2016 5:16pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: New Clean Propane Powered Scooter and Fun Kart
Replies: 60
Views: 7826

Re: New Clean Propane Powered Scooter and Fun Kart

A bit off topic, but this has ~bearing for off gridders. gas is gas, its just a matter of tuning. a methane digester could power a similar motor as a generator. a guy i knew ran a couple of old V8s on a large property for power, using a brick oven he built to gasify eucalypt wood, and running the mo...
by cycleops612
Dec 15 2016 1:52pm
Forum: E-Vehicles General Discussion
Topic: all warm climate urban cars should be part hybrid
Replies: 1
Views: 463

all warm climate urban cars should be part hybrid

"https://en.wikipedia.org/wiki/Automobile_air_conditioning In a modern automobile, the A/C system will use around 4 horsepower (3 kW) of the engine's power" Automatic stop start isnt going to happen on an ice car in gridlock w/ a/c on. all such cars should at least have sufficient electric power and...
by cycleops612
Dec 15 2016 12:42pm
Forum: E-Bike General Discussion
Topic: Came within inches of being killed on my eBike today
Replies: 22
Views: 2000

Re: Came within inches of being killed on my eBike today

In the early eighties, for three years I commuted 14 miles a day on city streets in Durham, NC which was, at the time, famous for killing bicyclists. After two days on the thoroughfares, I realized that I would not survive a month on those streets. I bought a city map and mapped out a route (a long...
by cycleops612
Dec 15 2016 6:13am
Forum: Battery Technology
Topic: LifePO4 vs 18650 Lithium
Replies: 70
Views: 13065

Re: LifePO4 vs 18650 Lithium

Lets get back to some basic philosophy for some noob clarity. Leaving out the 40mph 1000w 50kg cruisers for 100kg(220lb)+ guys, what do most want from a battery? Or perhaps better put, what is a good balance to strike? The balancing act is between factors: weight, range, on tap bursts of power to th...
by cycleops612
Dec 15 2016 3:53am
Forum: Battery Technology
Topic: LifePO4 vs 18650 Lithium
Replies: 70
Views: 13065

Re: LifePO4 vs 18650 Lithium

A123... frustrating to be unable to dabble with them due to unavailability making the discussion, well, a YAWN. <wink> They are quite available good sir if you know where to look ;) They have a few distributors you can locate on their website. OSNpower has some good recent reviews. For me, I've got...
by cycleops612
Dec 15 2016 3:42am
Forum: Battery Technology
Topic: LifePO4 vs 18650 Lithium
Replies: 70
Views: 13065

Re: LifePO4 vs 18650 Lithium

I had a friend from a beachside suburb here in Sydney, who made a business of selling a very specific type of battery.

She sold c-cells by the seashore.