Search found 405 matches

by JackFlorey
Oct 20 2021 12:39pm
Forum: EBike Technical
Topic: Power consumption sweet spot
Replies: 11
Views: 162

Re: Power consumption sweet spot

Thanks for the answers! I usually keep a steady 20 mph when I travel. What is your opinion on swtiching from my hub drive to a mid drive in my case? Mid drive shines on hills, because you can keep the motor at a more efficient operating point. If you are mainly riding flats, you won't see a signifi...
by JackFlorey
Oct 19 2021 11:10am
Forum: EBike General Discussion
Topic: Newbie Questions
Replies: 35
Views: 499

Re: Newbie Questions

However, the folding function is a quality that is hard to quantify. I've travelled with it on Trains and such and had a really good time using it to explore this summer. Yeah, there's that. I have a very good commuter bike - but I ride my folding Brompton as much, if not more than, the road bike. ...
by JackFlorey
Oct 18 2021 10:06pm
Forum: EBike Technical
Topic: Need a schematic — please help
Replies: 18
Views: 269

Re: Need a schematic — please help

If the throttle outs are Red cable : +5V Blue cable : - negative White cable : signal Green cable : battery voltage indicator Yellow cable : + positive of switch Brown cable : - negative of switch And the throttle inputs for the CA are 5v Red GND Black Thi Green Does the white wire from the throttl...
by JackFlorey
Oct 16 2021 5:28pm
Forum: Alternative Energy
Topic: Hydrogen storage.....Solid State ??
Replies: 8
Views: 347

Re: Hydrogen storage.....Solid State ??

Hillhater wrote:
Aug 14 2021 11:26pm
Plasma Kinetics proprietary nanophotonic material absorbs hydrogen at standard atmospheric pressure and temperature.
Good idea, but people have been working on this for 40 years or so. It's a fairly common solution.

https://www.energy.gov/eere/fuelcells/m ... -materials
by JackFlorey
Oct 16 2021 3:25pm
Forum: Motor Technology
Topic: 300A bldc esc, mosfets ringing, help
Replies: 34
Views: 598

Re: 300A bldc esc, mosfets ringing, help

The big issue with polypropylene caps is that by their shear size, they have big inductances and therefore really don't decouple in the same way ceramics do. Yep. When you look at their impedance over frequency, their lowest impedance happens at a fairly low frequency due to that effect. For critic...
by JackFlorey
Oct 11 2021 9:32am
Forum: EBike General Discussion
Topic: How do you think solid state batteries will change how we use hardware?
Replies: 119
Views: 2866

Re: How do you think solid state batteries will change how we use hardware?

I like the idea of 36v having half the speed of 72v, but with the same power. So assume with phaserunner hitting 50 amps 36v would make 1440 watts assuming 80 percent efficiency. Likewise at 72v and 25 amps power would also be 1440w (if motor is 80 percent efficient). 36v at 50 amps for climbing an...
by JackFlorey
Oct 10 2021 8:59pm
Forum: EBike General Discussion
Topic: How do you think solid state batteries will change how we use hardware?
Replies: 119
Views: 2866

Re: How do you think solid state batteries will change how we use hardware?

Can a person run at 36v but with double the amps of 72v? Sure. But the motor constant won't change, so without phase advance the top speed of the 36V will be half of the 72V system. (Even with phase advance there's only so much you can do.) You could of course choose a new motor with twice the moto...
by JackFlorey
Oct 08 2021 10:15pm
Forum: Electric Watercraft
Topic: Personal Amphibious project
Replies: 12
Views: 366

Re: Personal Amphibious project

Why do you need an adjustable rudder?
by JackFlorey
Oct 04 2021 4:40pm
Forum: EBike Troubleshooting
Topic: Fried DD Motor, replace Stator only?
Replies: 8
Views: 252

Re: Fried DD Motor, replace Stator only?

Sometimes having a primitive system that has cheap and abundant replacement parts, that don't have to be from the original maker can be better in the real world than an overly complicated, proprietary closed system where the manufacturer goes out of business, leaving people with expensive unrepaira...
by JackFlorey
Oct 04 2021 3:53pm
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 172
Views: 3141

Re: Ivermectin/Covid info

Molnupiravir works by interfering with viral DNA production. I know that antibiotics that work through that mechanism tend to be dangerous because they can, rarely, alter the DNA of the host - which can be devastating. Hmm. I don't think molnupiravir interferes with DNA replication. It interferes w...
by JackFlorey
Oct 04 2021 12:13pm
Forum: EBike General Discussion
Topic: How do you think solid state batteries will change how we use hardware?
Replies: 119
Views: 2866

Re: How do you think solid state batteries will change how we use hardware?

The Lyft BikeShare bike is just a little 500 watt ebike. It would not be able to take two passengers up a hill at a decent speed. To do that you would need much more than a 500 watt hub motor. It would not be able to take two passengers at all. It's not a two passenger bike. I've ridden them down h...
by JackFlorey
Oct 03 2021 9:37pm
Forum: EBike General Discussion
Topic: How do you think solid state batteries will change how we use hardware?
Replies: 119
Views: 2866

Re: How do you think solid state batteries will change how we use hardware?

One change I can imagine is locked clutch geared hubs replacing traditional clutched geared hubs. . . .Another thing I can imagine is rental mopeds becoming more common. These capable of transporting two people and equipped with more powerful motors and higher capacity batteries than an ebike. All ...
by JackFlorey
Oct 02 2021 9:34pm
Forum: EBike General Discussion
Topic: Latest project - transcon bike
Replies: 38
Views: 1161

Re: Latest project - transcon bike

My Kenda Thorn proof tires got a hole in the stem, then the spare Thron proof had the valve ripped off when I rode on it while flat. I am going to use the old ones as an extra layer between the tube and tire. Yeah, when I got home I switched to the Schwalbe Marathon Plus tires - I'll see if those m...
by JackFlorey
Oct 02 2021 6:26pm
Forum: EBike General Discussion
Topic: Latest project - transcon bike
Replies: 38
Views: 1161

Re: Latest project - transcon bike

Another ride. This was 180 miles round trip (stayed overnight in Long Beach.) No solar this time, just fast charging at EV charging stations. Did one charge going up, did two charges on the way back mainly because I got a flat right next to a charger. Stats: First day 90.9 miles 42.2 amp hours Secon...
by JackFlorey
Oct 02 2021 6:11pm
Forum: General Discussion
Topic: Ivermectin/Covid info
Replies: 172
Views: 3141

Re: Ivermectin/Covid info

We need things like that. We may have it soon. Molnupiravir (an antiviral) is about to be submitted for approval to the FDA. It cuts hospital admissions and deaths in half in unvaccinated people with COVID. Hopefully this won't go the way of other treatments and become another "the government ...
by JackFlorey
Oct 02 2021 1:30pm
Forum: EBike General Discussion
Topic: Trying to achieve 120km/h ebike
Replies: 18
Views: 457

Re: Trying to achieve 120km/h ebike

I've been trying to figure out the best setup for this, I'm thinking dual motor. Single motor, motorcycle chain drive. You should be able to do the reduction in one stage (i.e. with the chain alone.) Start with an old motorcycle frame (lighter the better) and go with something like this for a motor...
by JackFlorey
Sep 26 2021 2:20pm
Forum: EBike General Discussion
Topic: On/Off switch for ebikes
Replies: 18
Views: 452

Re: On/Off switch for ebikes

Link to something I can buy off the interweb pls, my 15a amazon purchase smoked out :shock: I have used this one for several builds, including one that could be switched between 36 and 72 volts: https://www.digikey.com/en/products/detail/nkk-switches/S732/1007152 But it's not available any more. I'...
by JackFlorey
Sep 25 2021 8:03pm
Forum: EBike General Discussion
Topic: On/Off switch for ebikes
Replies: 18
Views: 452

Re: On/Off switch for ebikes

docw009 wrote:
Sep 25 2021 2:18pm
Without spending much money, I just took an old AC switch and rigged it for anti spark.
That resistor looks pretty crispy.

There are plenty of switches out there rated for very high currents - and when the arc is internal (and the switch is designed for the current) it's not much of an issue.
by JackFlorey
Sep 24 2021 9:00pm
Forum: Motor Technology
Topic: Geared Hub Motor + Thru axle ?
Replies: 27
Views: 1112

Re: Geared Hub Motor + Thru axle ?

Through axle isn't a standard; it's a fad. I recall similar comments on the ISIS ("There are NO ADVANTAGES for an ISIS over a properly maintained square taper!") and the 9 and higher speed cassettes ("No one needs more than 8 speeds on any sane drivetrain - and 9 speed chains are too...
by JackFlorey
Sep 24 2021 8:42pm
Forum: Battery Technology
Topic: Best Charging Options
Replies: 10
Views: 286

Re: Best Charging Options

13s 54.6v output Lithium Ion Charger 16s 58.4v output LiFePo4 Charger Consider a used RSP-1600-48. It would be used as a "dumb" charger (no termination) but if you just need an occasional high rate charge it's a great option. You might want to limit the current if you are charging a small...
by JackFlorey
Sep 23 2021 9:16pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 136
Views: 5036

Re: E-bike mid-drive motors hardly outperforms hub motors

One problem with the big mid drives (like Lightning rods big block) is that bicycle chains were never meant to deal with that kind of power. Also they will no doubt be hard on the cassette teeth and the freehub mechanism. Yep. I think it's a mistake to go with anything other than a standard 8 speed...
by JackFlorey
Sep 23 2021 6:39pm
Forum: EBike General Discussion
Topic: E-bike mid-drive motors hardly outperforms hub motors
Replies: 136
Views: 5036

Re: E-bike mid-drive motors hardly outperforms hub motors

john61ct wrote:
Sep 22 2021 11:04pm
Or a bif geared mid drive best of all.
Agreed. Hard to beat a mid drive for steep hills/heavy loads.
by JackFlorey
Sep 23 2021 11:55am
Forum: EBike Technical
Topic: Mid drive AND direct drive rear hub together?
Replies: 5
Views: 217

Re: Mid drive AND direct drive rear hub together?

I have my DIY ebike with a rear DD hub motor and I'm looking for the cheapest way to upgrade my torque power for all the steep hills around me. Would adding something like a 500w/750 bafang mid drive kit on top of my direct drive ebike make sense? Or would it be better for weight/efficiency to ditc...
by JackFlorey
Sep 23 2021 11:20am
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1765
Views: 278866

Re: Thread for new battery breakthrough PR releases

Hillhater wrote:
Sep 21 2021 7:03pm
Another player in the LiSulphur market claiming 3x the energy density of NMC, thermal control, low cost, yada yada yada...
Oxis tried that. I tested some of their cells, and they met their specs at first even though the specs weren't very good. A month later they were dead. They went bankrupt.
by JackFlorey
Sep 20 2021 3:31pm
Forum: EBike Technical
Topic: will statorade overheat my magnets?
Replies: 7
Views: 881

Re: will statorade overheat my magnets?

does this mean that my magnets will be 100c if my stator is 100c? should i calibrate my motor controller to cut off the motor at 80c so that i dont overheat my magnets? the temperature probe is on the coils and currently my motor controller starts throttling at 80c and cuts off entirely at 100c No....