Search found 351 matches

by EBJ
Jun 18 2019 11:47pm
Forum: Battery Technology
Topic: 18650 Insulator Rings - Redundant?
Replies: 20
Views: 671

Re: 18650 Insulator Rings - Redundant?

Thanks for all the responses guys.
:bigthumb:
by EBJ
Jun 18 2019 8:30pm
Forum: Battery Technology
Topic: 18650 Insulator Rings - Redundant?
Replies: 20
Views: 671

Re: 18650 Insulator Rings - Redundant?

The fiber washers do not shrivel and shrink when they get hot. Also, sometimes the can is exposed due to vibration or a crash. These fiber washers are cheap. The *white* in the previous photo is a plastic insulator ring, here's a photo of it (from IMR Batteries) without shrink-wrap: https://cdn11.b...
by EBJ
Jun 18 2019 7:24pm
Forum: Battery Technology
Topic: 18650 Insulator Rings - Redundant?
Replies: 20
Views: 671

18650 Insulator Rings - Redundant?

I noticed everyone seems to be using the peel-n-stick insulator rings (usually made from fish-paper). But I also noticed that a lot of 18650's (mine included) already have an insulator ring under the shrink-wrap. https://i24.photobucket.com/albums/c43/joshpit2003/18650-Insulator-Rings_zpshtqm9yda.jp...
by EBJ
Mar 23 2019 2:11am
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 598

Re: In search of the illusive High-Torque, Low-Speed hub motor

OOPS. You were right Neptronix, (about just using the same system V and higher Kv with reduced performance) I just forgot to reduce throttle in the simulator. Doh! Here it is again corrected: https://drive.google.com/uc?id=1KQNZTU3242WWXVofsIGTKlyZnN5gQVxg https://www.ebikes.ca/tools/simulator.html...
by EBJ
Mar 23 2019 1:54am
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 598

Re: In search of the illusive High-Torque, Low-Speed hub motor

Good news: The QS motor sales-rep said they are willing to wind my motor to be ~6.7Kv. That's close enough to my originally desired specs: https://drive.google.com/uc?id=1e9YP9QpAf3sa9mc3rSAQElYp1gB0_rj9 https://www.ebikes.ca/tools/simulator.html?bopen=true&motor=MCRO5004_Sinks&cont=cust_100_300_0....
by EBJ
Mar 23 2019 1:48am
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 598

Re: In search of the illusive High-Torque, Low-Speed hub motor

Buy one and rewind it for the kV you really want? It's a lot of work.... :( Thanks for the suggestion, but not really keen on diving in that deep. I share that same :( thinking about it. lol. What I would do is run it at the full voltage you'd intended, so you can have as kickass a takeoff as you w...
by EBJ
Mar 23 2019 1:44am
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 598

Re: In search of the illusive High-Torque, Low-Speed hub motor

A MAC wouldn't cut the mustard if you really have 15% grades to climb in such a large wheel. Thanks for letting me know. (I noticed you ran a MAC in one of your builds) [...] higher kV [...] run lower voltage and higher amps. Thanks for the tip. I tried that in the simulator. But at 100A, even the ...
by EBJ
Mar 22 2019 3:34pm
Forum: Motor Technology
Topic: In search of the illusive High-Torque, Low-Speed hub motor
Replies: 8
Views: 598

In search of the illusive High-Torque, Low-Speed hub motor

Hey guys. I'm starting a project that is going to require a high-torque, low-speed motor because I'm running a ~30 inch diameter tire. To throw some numbers out, I'm looking for: ~100+ lb-ft of peak torque. (135 Nm) (90 lbs thrust) ~3000W of peak (motor) power. ~400 RPM (unloaded speed = ~35 MPH for...
by EBJ
Jan 27 2018 4:29pm
Forum: Electric Watercraft
Topic: Mini Boat
Replies: 4
Views: 1385

Re: Mini Boat

That's awesome!! I'm getting ready to build a jet boat from the bottom half of a jet ski hull Thanks. I imagine a jet ski hull is an excellent starting point for a mini jet-boat. I've seen a few other mini jet boats made from Aluminum, which is much better for dragging across rocks than fiberglass....
by EBJ
Jan 26 2018 6:30pm
Forum: Electric Watercraft
Topic: Mini Boat
Replies: 4
Views: 1385

Mini Boat

http://rapidwhale.com/images/mini-boat.jpg It's been a while since I've had an EV project, but I just completed my electric mini boat and thought I'd share it here. Story: I'd always been interested in mini boats ever since I had seen Paul Elkin's. His boat stuck with me for a few years, and then a...
by EBJ
Nov 15 2013 3:38am
Forum: Battery Technology
Topic: black friday
Replies: 10
Views: 985

Re: black friday

I don't know where you live, but where I live that term usually means there has been a bloody big bush fire and people have been killed and many homes burnt down..... what Friday are you referring too??? and where?? interesting. Learning something new every day. - Thanks for posting to the both of ...
by EBJ
Oct 24 2013 10:21pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Kickr - west coast meetup 12/24 - 1/02
Replies: 41
Views: 7084

Re: kickr - friction drive skateboard

Thanks.. actually 65 kits! 10 completes. We are pretty excited to get the ball rolling with this concept. I may point people to a new thread on ES on Kickr development/support. It could act as a sort of blog/technical reference area. Awesome. Good luck guys, I threw a few bucks your way. looking fo...
by EBJ
Sep 25 2013 2:35pm
Forum: E-Vehicles General Discussion
Topic: Chevy Spark EV
Replies: 50
Views: 4960

Re: Chevy Spark EV

I almost purchased the Spark (non-electric), but ended up going w/ a Prius C hybrid. Since I have nowhere to charge, a Spark EV wasn't a great option for me. (If Chevy made a hybrid Spark, it would have been a harder decision) Anyhow, Very excited about the Chevy Spark EV. ... just wish I had a conv...
by EBJ
Sep 18 2013 4:22pm
Forum: E-Vehicles General Discussion
Topic: Lifetime $ costs: Tacoma vs Prius C vs Leaf vs Model S
Replies: 0
Views: 799

Lifetime $ costs: Tacoma vs Prius C vs Leaf vs Model S

I just spent a good deal of time putting together this e-mail and thought I'd post it here for anyone else to look at. This was an e-mail response to: "My Tacoma is cheaper to operate (daily and over it’s lifetime) will go (and has gone) more places than most Teslas. It’s been up and down the BAJA p...
by EBJ
Sep 18 2013 11:26am
Forum: EV Business World
Topic: Ecotality, Maker of BLINK Chargers Files Bankruptcy
Replies: 1
Views: 1149

Ecotality, Maker of BLINK Chargers Files Bankruptcy

http://www.blogcdn.com/green.autoblog.com/media/2010/07/blink-commercial-charger---630.jpg "Ecotality Inc. (ECTY:US), a maker of charging stations for electric cars, filed for bankruptcy with plans to sell itself at a court-supervised auction to pay off debt. A unit of the company, Electric Transpo...
by EBJ
Sep 11 2013 5:25pm
Forum: Stand-up E-scooters and E-skateboards
Topic: TLT - 3 wheeler with tilting wheels, gas/electric
Replies: 8
Views: 2401

Re: TLAT - 3 wheeler with tilting wheels, gas/electric

loving this thing.
Very cool.

Nice find Sk8
by EBJ
Aug 26 2013 4:47pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Kickr - west coast meetup 12/24 - 1/02
Replies: 41
Views: 7084

Re: kickr - friction drive skateboard

I really like the idea of kick to the desired speed, then maintain. To slow down you could use the same thinking and say if the person takes a foot off and touches the ground it will slow down the set point and then maintain again. This would be a natural way to get rid of those pesky wireless cont...
by EBJ
Aug 22 2013 2:49pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Kickr - west coast meetup 12/24 - 1/02
Replies: 41
Views: 7084

Re: kickr - friction drive skateboard

Pretty neat concept. I couldn't tell how speed was controlled, but i think it would be ideal if it acted as a "cruise-control" for longboards. Kick to desired speed. Motor holds that speed. But then I would also like to see: - some sort of brake implemented. - a way to "cock" the drive-wheel mechani...
by EBJ
Aug 16 2013 11:45pm
Forum: Battery Technology
Topic: HobbyKing battery horrible RMA process
Replies: 26
Views: 1763

Re: HobbyKing battery horrible RMA process

Luckily I'm close enough where if I'm going to be making a large enough order, I'd drive to Lakewood to checkout the merchandise given their overall failure rate in my recent experience. Well then my advice to you: Don't pick up anything with a cell voltage difference of greater than .020V. Sift th...
by EBJ
Aug 16 2013 7:59pm
Forum: Battery Technology
Topic: HobbyKing battery horrible RMA process
Replies: 26
Views: 1763

Re: HobbyKing battery horrible RMA process

I figured I'd chime in. A while back I ordered about 110 of the Turnigy LiPo batteries from HK. Of those, I tested and returned about 40 of them . That's a 36.4% defect-rate . I cycle-tested each pack 3 times. I had 8 hyperion-chargers running at the same time and it was still a huge time-sink (I wa...
by EBJ
Aug 05 2013 2:40pm
Forum: E-Vehicles General Discussion
Topic: Prius C - 51.6 MPG
Replies: 6
Views: 1502

Re: Prius C - 51.6 MPG

CleverMonkey wrote:A quick search on Google turned up this plugin kit:
1.7KW DIY kit for $3,400.

http://www.pluginsupply.com/pricing/
I'm going to need to need a good deal of convincing before I start modding this 20K dollar vehicle... and mods aren't likely to happen until after the warranty period.
by EBJ
Aug 05 2013 2:38pm
Forum: E-Vehicles General Discussion
Topic: Prius C - 51.6 MPG
Replies: 6
Views: 1502

Re: Prius C - 51.6 MPG

Cool ^_^ What's your driving pattern? mostly city, mostly highway, some combination of both? and what's your highway cruising speed? mostly city. (with the exception of my latest road-trip to Yosemite) I cruise on the freeways at 65 mph. So far, I've been seeing about 54 mpg in the city , and 48 mp...
by EBJ
Jul 29 2013 7:15pm
Forum: E-Vehicles General Discussion
Topic: Prius C - 51.6 MPG
Replies: 6
Views: 1502

Prius C - 51.6 MPG

My wife and I purchased a 2013 Prius C - level II. We just filled-up for the first time since purchasing, and did: 411 miles ( Approx 75% city-miles, 25% highway-miles ) w/ 7.968 gallons = 51.6 MPG . We would have gone for a Nissan Leaf, but have no means of plugging it in at home. Anyhow, we are to...
by EBJ
May 10 2013 5:25pm
Forum: Stand-up E-scooters and E-skateboards
Topic: What happened to the Dirtsurfer? Alternatives?
Replies: 27
Views: 7878

Re: What happened to the Dirtsurfer? Alternatives?

That MXB things looks awesome.
You may be hard-pressed to build something of a similar quality for 3K...actually it looks to be 2.7K on their website.
Might just wanna consider saving up for one of those.