Search found 838 matches

by parajared
May 16 2018 9:41am
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

The only way what you are talking about is true is if we are talking about the OP's specific motor. In that case yes, the additional voltage will help on that specific motor.
by parajared
May 16 2018 9:33am
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

As anyone who has actually changed from a 36V to a 48V or 72V battery will tell you, the increase in acceleration and hill climbing torque is huge. The problem with this statement is that it's dead wrong. Someone who doesn't understand BLDC theory is going to read this and mistakenly buy the wrong ...
by parajared
May 15 2018 9:08pm
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

I think you are confusing manufacturer availability with physics.

The tendency is for manufacturers to make lower voltage motors for lower wattage setups. A manufacturer could totally make a 72 volt system that is only really capable of outputting a few hundred watts if they wanted to.
by parajared
May 15 2018 8:59pm
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

If you're comparing different systems and looking at their acceleration from 0-30 km/h for example, systems with voltage too low will have worse acceleration. No, that's wrong assuming the magnets are the same size a 100 watt motor that's operating at 12volts 20kv for 240rpm is the exact same thing...
by parajared
May 15 2018 8:54pm
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

Acceleration is dictated by two things 1) magnetic repulsion in guass on the magnet side 2) wattage on the electrical side The magnets don't care what kind of repulsion they are getting. It can be volt heavy, it can be amp heavy. 10amps 20 volts of repulsion is the same as 20amps 10 volts of electro...
by parajared
May 15 2018 7:26pm
Forum: E-Bike Technical
Topic: Difference in acceleration with different voltage?
Replies: 38
Views: 2197

Re: Difference in acceleration with different voltage?

What are you all even talking about? Your operating voltage has absolutely nothing to do with acceleration... zilch. The repulsion on the magnets is what dictates torque. All the motor cares about is wattage. I guess you guys haven't heard of 36 volt 700 amp golf carts? The kind that haul four fat d...
by parajared
May 10 2018 10:16am
Forum: E-Bike General Discussion
Topic: E-trike Aluminum vs steel frame
Replies: 30
Views: 2536

Re: E-trike Aluminum vs steel frame

Think of driving your one ton truck, its not going to get good mileage running 80 mph. At 50, much better. Same deal with any e bike... Yeah but internal combustion motored examples don't compare quite right. I think a "one ton truck" lets say a F-350 with an empty weight of 6000lbs will ...
by parajared
May 09 2018 1:48pm
Forum: E-Bike General Discussion
Topic: Arizona Electric Bicycle Law changes (2017)
Replies: 68
Views: 5621

Re: Arizona Electric Bicycle Law changes (2017)

Sorry to dredge up an old thread, I haven't posted in a while. I have ridden quite a number of "multipurpose paths" and most of them say motorized use forbidden but e-bikes are becoming more and more popular anyway; the way ebikes seem to get away with this is to look for the most part lik...
by parajared
May 09 2018 1:05pm
Forum: E-Bike General Discussion
Topic: Want to change from SLA to lithium
Replies: 27
Views: 2288

Re: Want to change from SLA to lithium

Oh also with hobby lipo you can run the voltage and amp-hours you want for the specific mission of the day. You can run 12s one day, 18s when you want a bit higher top speed and 24s when you feel that speed-demon urge. You are hard-locked into just one voltage with Ping. Since hobby lipo is small/li...
by parajared
May 09 2018 12:57pm
Forum: E-Bike General Discussion
Topic: Want to change from SLA to lithium
Replies: 27
Views: 2288

Re: Want to change from SLA to lithium

This is an old thread but I will weigh in anyway. A 48v 10ah Ping Battery will cost you $382 at the moment. Cons: -runs like crap when it's cold out (compared to hobby lipo) -you need a separate specialized charger rather than just a plain Jane hobby charger. -will voltage sag like crazy after about...
by parajared
May 09 2018 12:07pm
Forum: E-Bike General Discussion
Topic: First build - Help me decide on my battery
Replies: 5
Views: 909

Re: First build - Help me decide on my battery

No-one responded :(
I would buy two bottle batteries. Use the one "bottle" for your daily commute and have the second bottle for your 50km trips.

46.8V 11.8Ah might make 50km okay, but it sure is nice to have a second battery to swap in in case it accidentally doesn't.
by parajared
May 09 2018 11:44am
Forum: E-Bike General Discussion
Topic: E-trike Aluminum vs steel frame
Replies: 30
Views: 2536

Re: E-trike Aluminum vs steel frame

I'd go steel myself, simply because I weld (badly) and would be able to start frankenstien triking the thing. Adding stuff like sturdy racks, or a tow hitch. And, if need be, repair a broken frame. I ended up having to weld my trailer hitch to my trike. The way that InStep trailers make their hitch...
by parajared
May 09 2018 11:04am
Forum: E-Bike General Discussion
Topic: E-trike Aluminum vs steel frame
Replies: 30
Views: 2536

Re: E-trike Aluminum vs steel frame

I own a steel KMX Typhoon and appreciate that I was able to wire feed mig-weld a rear rack and side mount battery box to mine. If you own a TIG welder you can weld stuff to an aluminum trike and we should note that there are plenty of no welds required solutions to panniers, rear rack, battery boxes...
by parajared
May 02 2018 11:30am
Forum: E-Bike General Discussion
Topic: Range calculator
Replies: 12
Views: 1573

Re: Range calculator

Great video. I think the problem now is my lower back. I have pain after about 60 km - so maybe a small walk after every 50 km will help. Slipped disc for me. Recumbent trike ended up being my solution. I got a screaming deal on ebay for a display model trike KMX Typhoon at $700. For a brand new on...
by parajared
May 01 2018 12:46pm
Forum: E-Bike General Discussion
Topic: Range calculator
Replies: 12
Views: 1573

Re: Range calculator

I also see if I use the throttle, it really drains the battery, so it should be avoided for touring. My dream is to be able to go 120 km with 2 17.5ah batteries. Seems possible. When I did my 207 mile bike ride I would pack 12s 20 ah (880 watt hours) in order to have plenty of head-room, then knock...
by parajared
Apr 24 2018 3:07pm
Forum: E-Bike General Discussion
Topic: Range calculator
Replies: 12
Views: 1573

Re: Range calculator

10 watt-hours per mile: you and the bike are working in tandem, you and the bike are equally contributing. 20 watt-hours per mile: you are hauling a load, in a hilly environment, or in loose soil.. or you aren't doing much work. 40-70 watt-hours per mile: usually the wh/mi rating you see when you ar...
by parajared
Sep 25 2017 1:52pm
Forum: E-Bike General Discussion
Topic: Utah bikeways: my 207 mile bicycle ride
Replies: 0
Views: 807

Utah bikeways: my 207 mile bicycle ride

So I decided it was time to go on a friendly dog petting adventure (cleverly disguised as a cycling trip). Unlike last time (251 miles) where I relied on solar power, or the time before that (185 miles) where I used power outlets to charge up this time I used my truck's alternator to do all the char...
by parajared
Sep 02 2017 7:24pm
Forum: E-Bike General Discussion
Topic: Most scenic bike paths (for recumbents) in the southwest US?
Replies: 29
Views: 3498

Re: Most scenic bike paths (for recumbents) in the southwest

Ok, It's on! (finally years later) Boss gave me a week off and the itinerary is -Red Canyon Bikeway -Candy Mountain Express -Murdock Canal -Provo River Parkway -Jordan River (in it's entirety) -Legacy -Rio Grande -Ogden River Parkway 304 miles 8) I'm undecided whether to do Snow Canyon like Spinning...
by parajared
Aug 16 2017 11:51am
Forum: General Discussion
Topic: Paratransit
Replies: 3
Views: 668

Re: Paratransit

Parajared's paratransit

Image
by parajared
Aug 16 2017 10:02am
Forum: Battery Technology
Topic: Adding battery packs together
Replies: 18
Views: 2248

Re: Adding battery packs together

Well apparently 100 amp analog relays are a thing that exist. If you didn't want to pull over and manually switch you could 3-way toggle your batteries. You would have to send 5 volts to a 3-way toggle switch. position 1: battery 1 on (battery 2 off) position 2: both batteries off position 3: batter...
by parajared
Aug 16 2017 9:48am
Forum: E-Bike Technical
Topic: Android (phone) bike aps; any good ones?
Replies: 7
Views: 839

Re: Android (phone) bike aps; any good ones?

That's a good point, I don't use "velcro" like you would buy at Wal-Mart or the fabric store. I use the heavy duty stuff that wants to rip the back of my phone off whenever I try to detach it.
by parajared
Aug 15 2017 6:40pm
Forum: E-Bike Technical
Topic: Android (phone) bike aps; any good ones?
Replies: 7
Views: 839

Re: Android (phone) bike aps; any good ones?

I have a fuzzy piece of sticky velcro on the back of my phone that causes people to ask questions about me/question my sanity and it's on there largely due to this app. I sticky velcro my phone to my bike.
by parajared
Aug 15 2017 6:31pm
Forum: E-Bike Technical
Topic: Android (phone) bike aps; any good ones?
Replies: 7
Views: 839

Re: Android (phone) bike aps; any good ones?

It's free for the basic version. You basically are getting a Garmin/Tom-Tom clone. You don't get turn-by turn navigation help, no traffic advice, no voice telling you things with the free version but if you pay for the app you get these features. I use the free version. What makes it better than Goo...
by parajared
Aug 15 2017 5:05pm
Forum: E-Bike Build Threads / Photos & Video
Topic: overpowered bikes? 20+kw and 7kw vectors
Replies: 13
Views: 3644

Re: overpowered bikes? 20+kw and 7kw vectors

Depends on what you are doing and what you consider "OP." 20 kilowatts is only about 26 horsepower. That's overpowered for bicycling on the bike path and underpowered for street racing. In either case they look like a lot of fun and that's an impressive amount of lipo you have there sir. E...