Search found 14115 matches

by John in CR
May 26 2020 4:03am
Forum: General Discussion
Topic: What's wrong with youtube imbeds?
Replies: 2
Views: 27

What's wrong with youtube imbeds?

All I see now are white boxes instead of the imbedded youtube video.
by John in CR
May 26 2020 2:11am
Forum: Battery Technology
Topic: looking for the simplest balancing circuit
Replies: 10
Views: 505

Re: looking for the simplest balancing circuit

"The simplest" is to use batteries that are good enough to not need balancing. I agree. However, I'd still prefer to use balancing charger or BMS during first few months of using new battery. I finished recently my 1 kW charger with built-in 100A BMS for my 24S6P A123 26650 battery. https://i.imgur...
by John in CR
May 26 2020 1:22am
Forum: General Discussion
Topic: Thoughts? Ebike ticketed/conviction upheld (Canada)
Replies: 129
Views: 2237

Re: Thoughts? Ebike ticketed/conviction upheld (Canada)

3 years ago I bought new electric Ford Focus, and parked my ebike for good. But things were already getting sketchy in Toronto for ebikers. Too many idiots riding these stupid scooters all over the place. Sidewalks, drunk, no Dl, etc. Now I see guys on these things easily going 50 km/h in the city....
by John in CR
May 26 2020 1:18am
Forum: General Discussion
Topic: What size wrench is required for M10 sirloc nuts?
Replies: 7
Views: 125

Re: What size wrench is required for M10 sirloc nuts?

I am on the large Clydesdale size so I got the motor used for cargo bikes. ;-) I hope your terrain is flat and you're not expecting fun level performance. Did you inform Grin about the load you need to haul and terrain to be tackled? What size wheel diameter did you choose?...not 26" or larger I ho...
by John in CR
May 25 2020 2:24am
Forum: E-Bike Technical
Topic: Help please! I have a QS 205 v3 motor paired with a SVMC 72200 Sabvoton powered by a 72v 50ah 300a continuous BMS.
Replies: 13
Views: 213

Re: Help please! I have a QS 205 v3 motor paired with a SVMC 72200 Sabvoton powered by a 72v 50ah 300a continuous BMS.

By "shuts down" do you mean everything turns off? If so, then it sounds like the battery is shutting down due to a low cell or a BMS problem. You need to check the battery to see that it is properly balanced. Is it all enclosed with only the primary battery leads coming out of the pack, or can you g...
by John in CR
May 25 2020 2:12am
Forum: E-Bike Technical
Topic: 2wd hub motor build
Replies: 9
Views: 231

Re: 2wd hub motor build

I ran a lot of simulations using different combinations of motors. Will someone check my work. When you use dual motors are you supposed to put the total weight on each motor or split it between the motors. I put 330 lbs on the front motor and 180 lbs on the front one. Don't know if this is the way...
by John in CR
May 25 2020 2:03am
Forum: E-Bike Technical
Topic: 2wd hub motor build
Replies: 9
Views: 231

Re: 2wd hub motor build

Any suggestions? Use a mid drive instead of two hubs... :wink: +1...Offroad and slow steep climbs is no place for a hubbie, though a mid-drive rear for most of the power plus a hubmotor on the front for 2wd makes sense and with the right motor and wheel size, the front wouldn't need active cooling,...
by John in CR
May 25 2020 1:57am
Forum: E-Bike Technical
Topic: Lightest DOT compliant 16" moped wheels?
Replies: 7
Views: 278

Re: Lightest DOT compliant 16

Would like to see that sort of frame geometry full rear suspension but with a real cargo rack, carry say 50+lbs. I agree. Great looking bike, but the rack looks spindly, so a beefed up rack would enhance the look IMHO. If it's just about strength that same rack with a well designed truss structure ...
by John in CR
May 25 2020 1:51am
Forum: E-Bike Technical
Topic: Lightest DOT compliant 16" moped wheels?
Replies: 7
Views: 278

Re: Lightest DOT compliant 16

Would like to see that sort of frame geometry full rear suspension but with a real cargo rack, carry say 50+lbs. Make that same rack with a well designed truss structure and 50lbs should be simple using the same material as long as the connections to the bike are adequate for the load. In fact, wit...
by John in CR
May 25 2020 12:32am
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 38
Views: 796

Re: Suggest someone other than Hobbyking

There are sources for smaller format modules of cells. Links please. I can't say that I spent an extensive amount of time searching, but my local search results amounted to very little. I'd consider importing, but who to trust and what to buy... Ebay...Endless-Sphere for sale section are 2 prime ex...
by John in CR
May 25 2020 12:28am
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 38
Views: 796

Re: Suggest someone other than Hobbyking

... While I love automotive grade modules, when can be even easier to assemble than a pack made of RC lipo, . You are of course exaggerating ! Several times, i have picked up stock RC bricks and used then to power various. different voltage Ebikes simply with the use of different pre-made harness.....
by John in CR
May 24 2020 3:07pm
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 38
Views: 796

Re: Suggest someone other than Hobbyking

HK return policy is what sells lipos. I have seen alot of people get iffy results and they always make good. Sending known to be faulty rc lipo via any common carrier is likely to be against the law, and if it isn't, it should be...and people worry about exceeding 20mph ebike speed limits. :confused:
by John in CR
May 24 2020 3:02pm
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 38
Views: 796

Re: Suggest someone other than Hobbyking

Slightly used cells are better than buying new, because as long as they're still balanced then the cells and their interconnections are already proven. While I love automotive grade modules, when can be even easier to assemble than a pack made of RC lipo, I understnad not everyone has the space to f...
by John in CR
May 24 2020 1:11am
Forum: Battery Technology
Topic: Add your EV etiquette tips for the newbs
Replies: 24
Views: 1359

Re: Add your EV etiquette tips for the newbs

EV etiquette tip# 1 for all charging stations. Include normal household type outlets for those with ebikes to charge their batteries. A simple coin operated timer and switch would work well once you see enough usage to justify the cost.
by John in CR
May 24 2020 1:01am
Forum: Battery Technology
Topic: 40T, neodymium magnets, plasti dip cycle test
Replies: 77
Views: 1325

Re: 40T, neodymium magnets, plasti dip cycle test

How will all those little magnets affect the inductance of your pack? As I understand inductance of a battery pack should be minimized to the extent possible, eg keep the loop of wire containing the battery from the controller + and - terminals as small as practical.
by John in CR
May 24 2020 12:15am
Forum: E-Bike Technical
Topic: Unloaded vs Loaded Speed?
Replies: 22
Views: 548

Re: Unloaded vs Loaded Speed?

So, um, preference aside, am I to understand it that the best motor of choice for a given form factor will ALWAYS be the one that achieves top efficiency at the highest RPM withstanding pole count, lamination width etc? I've always found it curios that so many sellers advertise their highest rpm mo...
by John in CR
May 24 2020 12:06am
Forum: E-Bike Technical
Topic: Unloaded vs Loaded Speed?
Replies: 22
Views: 548

Re: Unloaded vs Loaded Speed?

For any given battery and controller, you get more initial and maximum torque from a slower wind motor, so there’s that too. You can have more capable climbing and better acceleration from a stop, without having to spend more or carry more weight. That kind of restriction is like putting a gas tank...
by John in CR
May 22 2020 7:11pm
Forum: E-Bike Technical
Topic: Unloaded vs Loaded Speed?
Replies: 22
Views: 548

Re: Unloaded vs Loaded Speed?

For any given battery and controller, you get more initial and maximum torque from a slower wind motor, so there’s that too. You can have more capable climbing and better acceleration from a stop, without having to spend more or carry more weight. That kind of restriction is like putting a gas tank...
by John in CR
May 22 2020 2:38am
Forum: Items for Sale - New
Topic: Revolt RV-120 and RV-160
Replies: 3
Views: 1039

Re: Revolt RV-120 and RV-160

PM sent
by John in CR
May 22 2020 2:31am
Forum: E-Bike Technical
Topic: Unloaded vs Loaded Speed?
Replies: 22
Views: 548

Re: Unloaded vs Loaded Speed?

So is there any efficiency penalty for selecting a kv that's way higher than you need? For example if your top speed was only 50% of the kv, limited using either the controller or just manual throttle control. There's very little loss in efficiency that way, and that occurs in the controller only a...
by John in CR
May 22 2020 1:06am
Forum: General Discussion
Topic: Suggest someone other than Hobbyking
Replies: 38
Views: 796

Re: Suggest someone other than Hobbyking

Place bigger orders for what you need and will need. Ordering $19 worth of anything online from anywhere is ridiculous. Think of the carbon release caused by such ordering.
by John in CR
May 21 2020 2:07pm
Forum: E-Bike General Discussion
Topic: Is It OK To Leave The Bike Outside In Winter?
Replies: 17
Views: 316

Re: Is It OK To Leave The Bike Outside In Winter?

If you don't mind my asking, where do you live? I've travelled to a couple different places to live now, in search of nice people and nice weather year round. I live in the central valley of Costa Rica, which abolished its military with the signing of the 1948 new constitution, so it's a peaceful c...
by John in CR
May 19 2020 9:34am
Forum: E-Bike General Discussion
Topic: Is It OK To Leave The Bike Outside In Winter?
Replies: 17
Views: 316

Re: Is It OK To Leave The Bike Outside In Winter?

Since when did inside a garage become "outside"? To me outside means exposed to the elements. If course, that is why we keep it inside and heated. It is freaking cold here in the winter. -15 is a comfortable day, when we unzip out coats and take the coffee on the terrace of the ski center. :D I'm s...
by John in CR
May 17 2020 2:29pm
Forum: E-Bike General Discussion
Topic: Is It OK To Leave The Bike Outside In Winter?
Replies: 17
Views: 316

Re: Is It OK To Leave The Bike Outside In Winter?

Since when did inside a garage become "outside"? To me outside means exposed to the elements.
by John in CR
May 17 2020 2:19pm
Forum: E-Bike Technical
Topic: HELP! Jerky driving with Grin All Axle hub motor
Replies: 30
Views: 432

Re: HELP! Jerky driving with Grin All Axle hub motor

You need to go thru the setup process of the Cycle Analyst. Don't be discouraged, because you bike isn't running right simply because it's not sufficiently configured yet.