Search found 1945 matches

by kfong
Jun 12 2018 3:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 4037
Views: 273081

Re: New "TSDZ2 Torque Sensor Central Motor"

casainho, great work. Just finished this thread. Have not been active for a while and needed to finish my bafang build. Now thanks to this thread, I will be throwing that out for a real torque sensor setup. The open source and FOC really kicks it in for me. What display do you recommend I order? I s...
by kfong
Jan 24 2018 8:37am
Forum: Battery Technology
Topic: HobbyKing 1-6S 500W 30V 20A Balance Charger on sale! $50 (Save $23)
Replies: 8
Views: 698

Re: HobbyKing 1-6S 500W 30V 20A Balance Charger on sale! $50 (Save $23)

I've been impressed with the battgo product. I have the round 600w version and the 8S balancer. Both are used to keep my 6s lithium bank in my Van topped off or balanced. Accuracy is good.
by kfong
Jan 05 2018 3:14pm
Forum: General Discussion
Topic: Dogman Dans E bike burns his house.
Replies: 172
Views: 18188

Re: Dogman Dans E bike burns his house.

Bummer about the fire Dan, been away from ES for a while. Been focused on my van build the past 3 years. Glad things have worked out for you. I will take more precautions with the Tesla pack I'm using in the van. Fell into the same false sense of safety. 220ah would make a bad fire if gone wrong, an...
by kfong
Mar 25 2016 12:26pm
Forum: Battery Technology
Topic: My solution to Li-po Fires
Replies: 28
Views: 2202

Re: My solution to Li-po Fires

oatnet wrote:Sounds like fun! Are you posting the build anywhere?

-JD
Not posted unfortunately, haven't spent much time on the web unless it's for work. Too many projects to get done.
by kfong
Mar 24 2016 10:08pm
Forum: EV Business World
Topic: methods - I want to make something happen...
Replies: 21
Views: 3754

Re: methods - I want to make something happen...

Patrick, I haven't been on the forum much but decided to pop in, been busy with my van conversion. Sorry to here about your divorce, hope you get it worked out. Good to see you still finding thrills in the wave. Wish Michigan had consistent waves, Kiteboarding and windsurfing is still a passion of m...
by kfong
Mar 24 2016 9:36pm
Forum: E-Bike General Discussion
Topic: Doctorbass 2WD ADAPTTO / NYX / MXUS 32kW 105 pounds
Replies: 282
Views: 39602

Re: Doctorbass 2WD ADAPTTO / NYX / MXUS 32kW 105 pounds

Haven't been on the forum for a while. Good to see you are still pushing the boundries of ebikes Doc.
by kfong
Mar 24 2016 8:44pm
Forum: Battery Technology
Topic: My solution to Li-po Fires
Replies: 28
Views: 2202

Re: My solution to Li-po Fires

My conversion van has taken all of my time. Electric conversion, or camper van? -JD Hey JD, wish it could be. Unfortunately it's just not practical to do. I'm converting a promaster cargo van into a full RV. This will allow me to travel with my toys (kiteboard, windsurfer, ebike, ect) and vacation....
by kfong
Mar 24 2016 8:23pm
Forum: Battery Technology
Topic: My solution to Li-po Fires
Replies: 28
Views: 2202

Re: My solution to Li-po Fires

A bit worried about some assumptions... Carbon fibre can't burn, it's already been burned. The classic fossil fuels, coal, coke, anthracite - basically pure carbon. The industrial revolution was fuelled by this stuff. A vacuum will prevent a LiPo fire, 'cos there's no oxygen. I seriously doubt this...
by kfong
Mar 24 2016 1:43pm
Forum: Battery Technology
Topic: My solution to Li-po Fires
Replies: 28
Views: 2202

Re: My solution to Li-po Fires

No unfortunately I have been too busy with projects. The only good news to report is this seems to help with the IR. I even vacuumed packed the one on my utility bike, but used cheap fiberglass matting and formex. Doubt I will get around to any burn test. Someone else will need to pick up where I le...
by kfong
Nov 17 2015 10:15pm
Forum: E-Bike General Discussion
Topic: Cargo Node utility bike
Replies: 13
Views: 1302

Re: Cargo Node utility bike

Interesting comments, I wouldn't need such a bike where I live. I only pointed it out for large city use. Folding bikes for subways and such. Ability to take on a passenger. Seems like a good approach, since it can be stored in the apartment away from theft. A small folder might be all that is neede...
by kfong
Nov 12 2015 7:51pm
Forum: E-Bike General Discussion
Topic: Cargo Node utility bike
Replies: 13
Views: 1302

Cargo Node utility bike

If I needed a good all around utility bike for the city. This has got to be the one I would concider electrifying. Just throw in a rear hub.

http://www.ternbicycles.com/bikes/471/cargo-node
by kfong
Oct 17 2015 11:33am
Forum: Stand-up E-scooters and E-skateboards
Topic: Onda Longa electric long board build
Replies: 38
Views: 7519

Re: Onda Longa electric long board build

I've been riding it around all summer, content just to push it around for the workout. Fall is here, so I will start on the conversion soon. If they go on sale, I might pick up another dedicated just for pushing around.
by kfong
Oct 17 2015 10:09am
Forum: General Discussion
Topic: My Motoped
Replies: 126
Views: 18529

Re: My Motoped

Sorry, haven't been on the sphere for a while. Been busy working on building an RV. The motoped is completed, I have not ridden it much since I would need to transport it to trails that allow for gas, mostly up north. The RV and motoped will provide a lot of fun next summer though. Motor is running ...
by kfong
Aug 29 2015 8:41pm
Forum: General Discussion
Topic: New Alex 24 rim, seam line not welded. Defect?
Replies: 2
Views: 290

Re: New Alex 24 rim, seam line not welded. Defect?

Thanks, just wanted some confirmation before I waste time lacing it. Had not seen this style of connection before.
by kfong
Aug 28 2015 6:28pm
Forum: Items for Sale - New
Topic: NEW Ultra HD Freewheel Testers Needed
Replies: 46
Views: 7311

Re: NEW Ultra HD Freewheel Testers Needed

Update, my cyclone free wheel on the motor has gone bad with all the riding, but Pablo's freewheel is still holding up. Need to find another cyclone freewheel to abuse.
by kfong
Aug 28 2015 5:55pm
Forum: General Discussion
Topic: New Alex 24 rim, seam line not welded. Defect?
Replies: 2
Views: 290

New Alex 24 rim, seam line not welded. Defect?

I just got a new Alex 24 DH rim. I can see through the seam line, is this the way they make them? Was told by the vendor it may have internal rods holding it together? It's had to tell. Anyone know if this is safe to use? There isn't even any side welds or spot welds seen. You can see the light shin...
by kfong
Aug 20 2015 5:51am
Forum: General Discussion
Topic: Justin is on youtube
Replies: 20
Views: 3623

Re: Justin is on youtube

Great video, good to see Grin pushing the forefront of ebike and eboard technology. I'm glad Justin has a thriving business and I wish him success in all his ventures.
by kfong
Jul 31 2015 7:00pm
Forum: Items for Sale - New
Topic: NEW Ultra HD Freewheel Testers Needed
Replies: 46
Views: 7311

Re: NEW Ultra HD Freewheel Testers Needed

I've been quite happy with the new freewheel. No sign of problems, I'm running the lowest gear usually to get the most torque. Acceleration on 48 volts is good, with a max speed of 36mph. It's been a fun bike to get to speed quickly. Previous freewheels would be showing signs of wear.
by kfong
Jul 05 2015 3:54pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Onda Longa electric long board build
Replies: 38
Views: 7519

Re: Onda Longa electric long board build

Kfong -- I'm looking forward to your enclosure solution I have an Onda Longa and Greece Ebay transmission but not built yet. I hear you about the land paddling. It's great core and upper body training. It's perfect compliment exercise to E boarding. I love how people look at me like I am a a barbar...
by kfong
Jul 03 2015 7:16pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Onda Longa electric long board build
Replies: 38
Views: 7519

Re: Onda Longa electric long board build

Finished the motor mounts, just waiting for the ESC from Marcin to arrive. In the meantime I've been having a lot of fun pushing the board around land paddling. It's a great workout so even with the board motorized, I will still take off the belt just for the upper body workout. The push stick is ou...
by kfong
Jun 28 2015 8:39pm
Forum: General Discussion
Topic: My Motoped
Replies: 126
Views: 18529

Re: My Motoped

Whoohoo! Finally got the motoped running. It started up on the second kick. Only had to adjust the idle screw to keep it running. Surprisingly trouble free, even the wiring was correct. Rode it around the block, first gear is way too low. Actually all the gears seem to be on the low side. Going to t...
by kfong
Jun 28 2015 7:40am
Forum: E-Bike General Discussion
Topic: Lipo failure
Replies: 108
Views: 9423

Re: Lipo fire

Bummer, that's why I could never recommend them to anyone getting into Ebikes. Plenty of safer battery chemistries out there and services that will put a pack together for you.
by kfong
Jun 28 2015 7:28am
Forum: E-Bike Technical
Topic: EBike Toolbox - Bargains! $
Replies: 142
Views: 45784

Re: EBike Toolbox - Bargains! $

alsmith wrote:I've started in a similar direction but I'm tapping ~12V from 4 of the LiFePO4 cells in my battery pack for low load items (alarm).

Tapping Into you packs would create an imbalance issue. You are better off getting a DC/DC converter or building a separate pack.
by kfong
Jun 26 2015 6:58pm
Forum: Battery Technology
Topic: 18650 Ebay deals, reasonable?
Replies: 15
Views: 1098

Re: 18650 Ebay deals, reasonable?

You could still used a standard lithium charger. It won't charge all the way, but batteries will last longer if you follow the 80-20 rule of charge. Just work out how much current you need and have enough in parallel to keep the packs cool. I would assume 2C rating for most old gen laptop cells. Don...
by kfong
Jun 19 2015 12:02am
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1332
Views: 147789

Re: Dave's 80:1 RC mid drive kit build log

Sounds like an angry swarm of bees, higher pitch and even louder than the cyclone. I wouldn't be able to get away with it in the trails around here.