Search found 1230 matches

by flathill
Mar 17 2019 12:30am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 165
Views: 17715

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

.... there just isn't the space for a normal socket head or the meat to do a recessed socket head (arm piece is just 1/8" thick).... What I am seeing is two exposed screws on the bottom of the arm that could be changed to hex bolts. That won't help. Cap screws on a flat surfaced hole are indetermin...
by flathill
Mar 15 2019 12:46am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 165
Views: 17715

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

I wonder if the flat head taper causes the fastener to stretch and loosen given the back and forth torque creates a wedge lever. You might get away without the second spline with socket heads. Lug nuts on car wheels are tapered but they have much more meat than a flat head screw Look at ur disc brak...
by flathill
Mar 10 2019 8:48pm
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 91
Views: 15294

Re: Optimal Hub Motor design? Break down of BionX D-Series

Ultrasonic xacto knife will open it right up. Honda makes good ones
by flathill
Mar 10 2019 4:24am
Forum: E-Vehicles General Discussion
Topic: Reflections echo reflexions
Replies: 16
Views: 971

Re: Reflections echo reflexions

75-10 motor

That's in millimeters
by flathill
Mar 10 2019 3:46am
Forum: E-Vehicles General Discussion
Topic: Reflections echo reflexions
Replies: 16
Views: 971

Re: Reflections echo reflexions

Or belt drive sprocket pulley with internal drum brake like they had in 1788
by flathill
Mar 10 2019 3:45am
Forum: E-Vehicles General Discussion
Topic: Reflections echo reflexions
Replies: 16
Views: 971

Re: Reflections echo reflexions

Or belt drive sprocket pulley with internal drum brake like they had in 1788
by flathill
Feb 09 2019 5:01am
Forum: Battery Technology
Topic: Tesla acquires maxwell - why Luke?
Replies: 24
Views: 1570

Re: Tesla acquires maxwell - why Luke?

Big waste ah money Dry electrode tech is already on its way to China via ex Maxwell co inventor Linda Zhong An inventor with 38 released US patents, made Maxwell world #1 Ultracapacitor technology company by the famous dry electrode method. Entrepreneur @EnerTrode Inc • Employee Apr '11 - Present (7...
by flathill
Jan 22 2019 3:45am
Forum: EV Business World
Topic: EU imposing up to a 79% import duty on Chinese ebikes..
Replies: 4
Views: 745

Re: EU imposing up to a 79% import duty on Chinese ebikes..

Guy told me how it all works... He moved his plywood factory to China. You sell at or below cost when you export and then all your profit comes from export subsidies. He was getting an 18% export subsidy payment which means his profit margin was 18% if he sold at cost. 9 times higher than his 2% pro...
by flathill
Dec 13 2018 4:26am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 4110
Views: 329919

Re: Sur-Ron - New Mid drive Bike

Thumb throttles r weaksauce. You can't ride trials with em which is the ultimate test. That was figured out in the 70s in france and austria. prove me wrong and post a video hopping up on a boulder
by flathill
Oct 30 2018 10:21pm
Forum: Forum Rules and Features
Topic: The future of our forum - facebook versus web forums
Replies: 65
Views: 7299

Re: The future of our forum - facebook versus web forums

Invision Power Board or something similar Kill Facebook now Don't try to migrate data or users just archive current site fresh start Killing facebook / a fresh start is much easier said than done for a lot of reasons. Invision is a paid message board that you can host yourself... answer me this.. W...
by flathill
Oct 30 2018 1:08am
Forum: Forum Rules and Features
Topic: The future of our forum - facebook versus web forums
Replies: 65
Views: 7299

Re: The future of our forum - facebook versus web forums

Invision Power Board or something similar

Kill Facebook now

Don't try to migrate data or users just archive current site

fresh start
by flathill
Jul 24 2018 2:12am
Forum: Forum Rules and Features
Topic: The forum got a haircut!
Replies: 30
Views: 2519

Re: The forum is getting a haircut! - archive your old PMs!

If you r trying to save half a gig by deleting PMs the forum needs a new sponsor. Sorry to be blunt
by flathill
May 03 2018 4:12am
Forum: EV Business World
Topic: Luna Cycle's "world's safest battery" lacking MSD
Replies: 33
Views: 4142

Re: Luna Cycle's "world's safest battery" lacking MSD

Just sent the shipper the MSDS for the raw cells. This is what boosted boards does when shipping to japan. This is more informative than any battery pack MSDS anyways.

Read a power tool battery msds. Most don't mention even the battery voltage let alone how the cells are arranged/packaged
by flathill
Apr 24 2018 3:29am
Forum: Battery Technology
Topic: Tesla Model 3 battery teardown!
Replies: 27
Views: 2327

Re: Tesla Model 3 battery teardown!

The precision/accuracy of 30 year old cnc wirebonding machine tech is more than enough for large cells. Today's machines are way overkill Simply use thermal camera with machine vision to flag bad "welds". Load test before encapsulation You can think of the bus bar layer as a flex pcb but instead of ...
by flathill
Apr 24 2018 2:11am
Forum: Battery Technology
Topic: Tesla Model 3 battery teardown!
Replies: 27
Views: 2327

Re: Tesla Model 3 battery teardown!

Note the insulating dividers between banks of parallel cells . The cells in parallel are ok if they do touch. Banks in serries cannot touch Contractors at the gigafactory went to the media yelling hysterical about defective model 3 battery packs. The media pays cash on the down low if you have any n...
by flathill
Mar 23 2018 5:38am
Forum: Motor Technology
Topic: End turns bad?
Replies: 246
Views: 15554

Re: End turns bad?

Why don't u ask Grigori Perelman

U weren't particularly rude to me but you were to my friends

so I'm done talking to you

Peace out
by flathill
Mar 23 2018 2:22am
Forum: Motor Technology
Topic: End turns bad?
Replies: 246
Views: 15554

Re: End turns bad?

visualize the flux passing thru the Riemann surface bounded by the coil's turns

I will be not replying further as you are too rude
by flathill
Mar 22 2018 4:37am
Forum: General Discussion
Topic: Self Driving Uber Kills Pedestrian
Replies: 116
Views: 8329

Re: Self Driving Uber Kills Pedestrian

you can see far ahead an oncoming car's headlights comes out diagonally from the taillight of the car ahead traveling in the same direction. this happens in the first second of the video at the same moment the woman/bike was in the shadows this was likely "trippy" for the neural net and "consumed" i...
by flathill
Mar 21 2018 7:08pm
Forum: Motor Technology
Topic: End turns bad?
Replies: 246
Views: 15554

Re: End turns bad?

water seeks its own level forget rotary motors and just think about a linear motor (unrolled rotary motor) imagine two moving magnets on the top of the assembly held securely 3 inches apart, each magnet a sqaure block 1x1x1 inch cubed, placed on rails such that they can only move left/right, one mag...
by flathill
Sep 16 2017 1:28am
Forum: E-Bike Non-hub Motor Drives
Topic: 4KW Bikee Bike Mid Drive System Made in Italy
Replies: 4
Views: 1665

Re: 4KW Bikee Bike Mid Drive System Made in Italy

Nice I hear you can hit 200nm.peak which is more than most hub motors and that before torque multiply (gears
by flathill
Sep 07 2017 10:02pm
Forum: E-Bike General Discussion
Topic: AVIAN featherweight mid drive
Replies: 115
Views: 16739

Re: AVIAN featherweight mid drive

Cool battery pack!

Are the holders/connectors made of aluminum? If so what about oxidation? Aluminum oxide is a insulator. I guess you could sand before assembly and hope it stays air tight...

Maybe you know this and they are nickel plated copper? :)
by flathill
Aug 14 2017 10:05pm
Forum: E-Bike General Discussion
Topic: What's the point of 1000+W ebikes ?
Replies: 147
Views: 10339

Re: What's the point of 1000+W ebikes ?

You can't "California Roll" stop signs on a motorcycle anymore without getting fined (If you do it often and daily) Il-legal ebikes are now the fastest way to get from point a to b. Officers aren't stupid they know your fugly ebike is above the legal limit but jaded officers know the difference betw...