Search found 944 matches

by flat tire
Dec 17 2018 3:45pm
Forum: General Discussion
Topic: Know Anything about 'Openresty?'
Replies: 5
Views: 110

Re: Know Anything about 'Openresty?'

Someone put software on their webserver but didn't configure it and when you tried to browse to some site or other (or got redirected there) you saw that message. It has nothing to do with you.

You can google that software for more info.
by flat tire
Dec 15 2018 2:39pm
Forum: E-Bike General Discussion
Topic: eBike mod ideas
Replies: 16
Views: 537

Re: eBike mod ideas

You don't need to do anything exotic like cool your motor. Just buy something big enough. Even something like a 1.5kw nominal motor could probably take your use all day. 1KW if it's cold. You can also look into a mid drive if you want more of a install and maintenance challenge. The advantage of a m...
by flat tire
Dec 13 2018 1:31pm
Forum: E-Bike General Discussion
Topic: Where are the hq geared hub motors?
Replies: 20
Views: 640

Re: Where are the hq geared hub motors?

Because hub motors in general suck due to adding mass in the worst possible place and it's not worth making expensive high end geared hubs. It would be too much of a niche product and by the time you get around making everything decent quality and in low volume it will cost over twice as much. Basic...
by flat tire
Dec 13 2018 1:28pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric Buell racebike build
Replies: 22
Views: 2611

Re: Electric Buell racebike build

Great work. Subscribed to thread. Where did you get the Zero motor?
by flat tire
Dec 13 2018 1:19pm
Forum: Battery Technology
Topic: My first diy battery pack, need helps!
Replies: 8
Views: 213

Re: My first diy battery pack, need helps!

Those welders are kind of worthless, and with pure nickel you'll have to use the electrodes directly on the body of the welder or make your own extensions. The extension cables on mine were copper plated aluminum. I ended up throwing that welder away and had better luck with a lipo powered one made ...
by flat tire
Dec 13 2018 1:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: quick bbs02v2 question: 16 awg power wires ?
Replies: 3
Views: 143

Re: quick bbs02v2 question: 16 awg power wires ?

You already know the battery voltage and nominal current. You can look up the resistance of a segment 16ga wire on google which is a function of conductor (probably copper) and the length. Then a calculator for "power dissipation in resistors" can show the answer in a couple clicks. You're probably ...
by flat tire
Dec 11 2018 1:53pm
Forum: General Discussion
Topic: Discussion on counterfeits
Replies: 6
Views: 192

Re: Discussion on counterfeits

Common business practice in China. Unless you have good reason to believe your products aren't in this category, you should probably assume they are even if full price and certainly if the price is too good to be true. Using paypal and buying from reputable sellers who other people vouch for is one ...
by flat tire
Nov 29 2018 12:47am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3084
Views: 296987

Re: new cyclone 3000 w mid-drive kit?

72v is easier on the heat in the motor and the chain. For 40mph, you only need about 2000w. Anything can do that. Explain. Torque (phase amps) and torque ramp will determine mechanical impact on drivetrain. Strain on the motor itself depends on power input and efficiency. This motor is not good for...
by flat tire
Nov 28 2018 7:47pm
Forum: General Discussion
Topic: 48V MOTOR KITS MAX VOLTAGES
Replies: 5
Views: 215

Re: 48V MOTOR KITS MAX VOLTAGES

You'll be fine many people have run over 100V. Ultimately the insulation should be good to a few hundred volts without any shorts.
by flat tire
Nov 28 2018 7:37pm
Forum: E-Bike Technical
Topic: Two "handle bar" positions
Replies: 18
Views: 355

Re: Two "handle bar" positions

I should admit I am a newbee in 3D printing tho, having done a fair amount of research. I've been 3d printing for years making prototypes for a unrelated business. A good rule of thumb is it's best not to 3d print anything structural where consequences of failure are meaningful. Seat anchors to hol...
by flat tire
Nov 28 2018 2:33pm
Forum: E-Bike General Discussion
Topic: Newbies First Build - 3000w Cyclone w/ 72v battery?!
Replies: 15
Views: 564

Re: Newbies First Build - 3000w Cyclone w/ 72v battery?!

Google "Tangent Drive" and you will find their site. They'll be able to answer any questions you have. Backpack batteries are awful. I've gone both ways, and while a lighter bike will handle a little better, moving that weight to your back will just tire you out faster as you move around on the bike...
by flat tire
Nov 28 2018 2:11pm
Forum: E-Bike Technical
Topic: Two "handle bar" positions
Replies: 18
Views: 355

Re: Two "handle bar" positions

Be careful with the 3d printed mounts. The carbon doesn't add extra strength just stiffness (which can make it more brittle) and maybe some abrasion resistance.
by flat tire
Nov 27 2018 9:01pm
Forum: E-Bike General Discussion
Topic: Newbies First Build - 3000w Cyclone w/ 72v battery?!
Replies: 15
Views: 564

Re: Newbies First Build - 3000w Cyclone w/ 72v battery?!

You'll overheat the motor in minutes if you ride like you're on a track even with 3kw. I trust you know what that means, most people here don't ride hard and mess around at most. I've run these drive at 2.5-7kw and even on 2.5kw I had to limit my wrist way too much. It sucks. I just want to accelera...
by flat tire
Nov 27 2018 5:01pm
Forum: Electric Aircraft
Topic: Finally started my electric aircraft build
Replies: 10
Views: 584

Re: Finally started my electric aircraft build

Nice project I will follow it closely. One suggestion for your intro is to leave out the slow cars, unless that's the joke and I didn't get it.
by flat tire
Nov 27 2018 4:58pm
Forum: E-Bike General Discussion
Topic: Newbies First Build - 3000w Cyclone w/ 72v battery?!
Replies: 15
Views: 564

Re: Newbies First Build - 3000w Cyclone w/ 72v battery?!

If you used to race motocross you will be extremely disappointed with the cyclone 3000w in any form, especially with stock controller and throttle. Not enough power, questionable quality.
by flat tire
Nov 25 2018 11:19pm
Forum: E-Bike Technical
Topic: Is there a connector wiki or guide?
Replies: 4
Views: 158

Re: Is there a connector wiki or guide?

I asked this question a long time ago and didn't really get any answers besides "military". Nearly all the signal connectors people use on ebikes are really bad. mcmaster.com has some decent "mil spec" connectors under electrical and lighting > plugs and receptacles. In general to find good connecto...
by flat tire
Nov 22 2018 3:18am
Forum: Battery Technology
Topic: What Are The Pros & Cons Of These 2 Battery Systems?
Replies: 6
Views: 243

Re: What Are The Pros & Cons Of These 2 Battery Systems?

Good canned cells are under 14 lbs / nominal kwh. So even with packaging you're at 3x lbs for a ~2kwh nominal battery. That's less than a single lead acid car battery. Also, I finally looked at the link for the quad itself and that thing is ridiculously expensive with underwhelming specs to say the ...
by flat tire
Nov 21 2018 10:56pm
Forum: Battery Technology
Topic: What Are The Pros & Cons Of These 2 Battery Systems?
Replies: 6
Views: 243

Re: What Are The Pros & Cons Of These 2 Battery Systems?

You make it sound like you have no idea what you'll use the quad for, or how much energy a given task will take. The second one is forgiven but what is not, and needs to be corrected at once BY YOU is to say what you want the quad to do (how far, how fast, how much cargo, what terrain, etc). Like th...
by flat tire
Nov 21 2018 9:10pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3084
Views: 296987

Re: new cyclone 3000 w mid-drive kit?

Remi812 wrote:
Nov 19 2018 10:51pm
flat tire wrote:
Nov 18 2018 1:59am
Unless you're spinning backwards that tensioner is in the wrong place. It should be on the bottom.
Nope, looks good to me !
You're right my brain was spinning backwards.
by flat tire
Nov 18 2018 4:54pm
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 741

Re: A portable gasoline generator for long range

This is the most poorly thought out idea I have ever heard. You are describing a shitty gas powered bike with unnecessary electrical bits. Just make a regular gas powered bike, or get a motorcycle: motorized bicycles are the wrong tool for long cross country trips anyhow. If you're committed to elec...
by flat tire
Nov 18 2018 4:18pm
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 584

Re: Large lead acid forklift battery self discharging

Forklifts are necessarily heavy so they don't tip over lifting shit. If your mast tilts forward and / or your load is high, the problem can be amplified. If you remove the batteries you'll just have to install some other type of counterweight like concrete. I almost endo'd a 9000lb forklift at one p...
by flat tire
Nov 18 2018 2:11am
Forum: E-Bike General Discussion
Topic: Any pictures of your LeafBike wheels/axles?
Replies: 3
Views: 226

Re: Any pictures of your LeafBike wheels/axles?

It's a threaded ebike axle like any other with 1 nut per side and washers. The wire comes out of the axle between the dropouts. No issues removing either nut.
by flat tire
Nov 18 2018 2:07am
Forum: Battery Technology
Topic: Large lead acid forklift battery self discharging
Replies: 20
Views: 584

Re: Large lead acid forklift battery self discharging

A 1kwh battery is ridiculously small and only a few hundred bucks. Just put it on the back and leave the lead acid pack in for balance. You'll probably want at least 2kWh for longevity and stress related reasons though.
by flat tire
Nov 18 2018 1:59am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3084
Views: 296987

Re: new cyclone 3000 w mid-drive kit?

Unless you're spinning backwards that tensioner is in the wrong place. It should be on the bottom.