Search found 61 matches

by Mikebergy
May 20 2016 7:49pm
Forum: Battery Technology
Topic: Good 14s R/C charger?
Replies: 5
Views: 634

Re: Good 14s R/C charger?

I've never seen a 14s- capable RC charger, but it looks like you found one from Graupner. Most would say they are overpriced, but Graupner and Hyperion are the Mercedes and Maybach of the RC world, whether you think they are worth the money is up to you.
by Mikebergy
May 20 2016 7:45pm
Forum: E-Bike Technical
Topic: Lunacycles Charger - adjustable?
Replies: 33
Views: 4690

Re: Lunacycles Charger - adjustable?

What kind of 12s setuo you got going? Ive been looking for ready made, high power, BMS, packs in 12s I bought the multistar Lipo Packs and will be wiring them to a Bestech Power D223V1 BMS board. I've read that a lot of people don't recommend RC Lipo with a BMS and bulk charging, but others do. I'v...
by Mikebergy
May 20 2016 9:36am
Forum: E-Bike Technical
Topic: Lunacycles Charger - adjustable?
Replies: 33
Views: 4690

Re: Lunacycles Charger - adjustable?

Yes. I just bought one with the intent of turning the voltage down for a 12s setup I am building. It is the pot on the right,by itself that adjusts the voltage. Clockwise to decrease it, I believe. If you are getting a Luna charger for 35$, that is a great deal. I just paid 75 shipped and don't feel...
by Mikebergy
Apr 13 2016 12:04am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

Thanks for the replies. Alan gives some some really interesting ideas about the hardware, and I do think that it is an added complexity, but then so are a lot of systems going into vehicles. Nobody needs auto drive or back up cameras or battery cooling systems, or etc... But maybe a system like this...
by Mikebergy
Apr 10 2016 10:17am
Forum: Large EV General Discussion
Topic: WantTeslaModel 3($35k base price)USA reserveASAP=BestDeal!
Replies: 43
Views: 3633

Re: WantTeslaModel 3($35k base price)USA reserveASAP=BestDea

Just read where Koch Bros and all big oil is gearing up to fight alt energy and especially EV's. In their presentation to the press, they never mention clean environment, and all aspects of contamination from fossil fuels. Just crying about "unfair subsidies" to alt energy. :lol: Is there any surpr...
by Mikebergy
Apr 10 2016 9:14am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

Torque controls is a great way to go, with anti-slip detection and torque backoff. It is easy enough to reduce the torque on the inside wheels if that is desired. For most situations it is probably not needed, but for extreme turning at high drive torque it can reduce slip. But if anti-slip techniq...
by Mikebergy
Apr 10 2016 9:08am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

But it looks like torque vectoring/electronic differential has not yet been utilized anywhere outside of the lab experiments I read about. Electronic (torque vectoring) differentials have been used in competition cars ..race and rally etc,..for several years, and i believe several road cars (Mitsub...
by Mikebergy
Apr 10 2016 9:01am
Forum: E-Bike Build Threads / Photos & Video
Topic: Friction Drive New Kepler carbon build
Replies: 99
Views: 25261

Re: New Kepler carbon build

Does SRAM shift indexing work across both disciplines? Eg. SRAM 10 speed STI road shifter with mtb rear derailleur and MTB cassette for bigger gear spread? I believe all their 10-speed stuff is indexed the same, but I've not needed to worry about it, as the Apex long cage is dirt cheap and supports...
by Mikebergy
Apr 10 2016 8:58am
Forum: E-Bike Build Threads / Photos & Video
Topic: Friction Drive New Kepler carbon build
Replies: 99
Views: 25261

Re: New Kepler carbon build

5800 series 105's are about the cheapest you can buy with hidden cables but then you are forced to go 11 speed. You can find 10 speed all over the place with hidden cables. I run Sram Apex on my roadie, and it is dirt cheap, and 10-speed. I believe all their 10-speed stuff is indexed the same, but ...
by Mikebergy
Apr 09 2016 6:20pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Friction Drive New Kepler carbon build
Replies: 99
Views: 25261

Re: New Kepler carbon build

Kepler wrote: 5800 series 105's are about the cheapest you can buy with hidden cables but then you are forced to go 11 speed.
You can find 10 speed all over the place with hidden cables. I run Sram Apex on my roadie, and it is dirt cheap, and 10-speed.
by Mikebergy
Apr 09 2016 2:11pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 1092
Views: 69272

Re: Tesla Model 3

If they only sell 1/3 of the cars people have reserved, they will have more than doubled their cumulative sales up to this point. Thanks to all the folks who have preordered. I thought about it, but will not likely put my reservation in for a month or two longer. That should give Tesla enough time t...
by Mikebergy
Apr 09 2016 8:53am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

The only use of a differential is to drive more than one wheel with one motor, but with electrics, it would be better to drive each independantly. I don't think think this is universally true, as a well-designed mechanical differential would not really be any worse than the set of reduction gears t...
by Mikebergy
Apr 09 2016 8:45am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

Yes, I understood. What I was curious about was how to deal with the weight transfer and the inevitable inside wheelslip. As one corners, the weight transfers to the outside wheel, and then you want to distribute the torque unevenly left to right, biasing heavy on the outside where the grip is highe...
by Mikebergy
Apr 09 2016 12:25am
Forum: E-Bike General Discussion
Topic: Q100 and Q128 with 0.35mm laminations
Replies: 254
Views: 29282

Re: Q100 and Q128 with 0.35mm laminations

I am still ready for a front and rear matching motors. Just let me know what is going to be made available and how much. I'll be running 12 or 14s in a 700c wheel set.
by Mikebergy
Apr 09 2016 12:15am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

Re: AWD without differentials?

Yeah, hub motors would not be my choice. I don't think applying the same torque on both inside and outside wheels during cornering would be ideal, since at some point the inside will begin to spin, but as long as the wheels don't get chewed up when cornering that should be alright. Llile, no issues ...
by Mikebergy
Apr 07 2016 11:10pm
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4444

AWD without differentials?

Curious if anyone knows of any differential-less AWD or even 2WD drivetrains? I'm curious if anyone has used "torque-vectoring" or whatever the electronic control technology may be to control the L-R variation while turning, loss of traction,etc without the use of a mechanical differential. I've rea...
by Mikebergy
Apr 06 2016 5:33pm
Forum: General Discussion
Topic: POS [Point Of Sale] system for restaurant
Replies: 60
Views: 8651

Re: POS [Point Of Sale] system for restaurant

If it was me, I'd use an iPad with a Square setup. As LFP said, a lot of people use them, there is a minimal amount of hardware, and it doesn't clutter the often-limited counter space. You might be able to do the same thing with a less expensive tablet though.
by Mikebergy
Apr 06 2016 5:16pm
Forum: E-Vehicles General Discussion
Topic: Arcimoto: 100mi under $20k
Replies: 26
Views: 4713

Re: Arcimoto: 100mi under $20k

I have been watching this for the past several months, and hope they produce them. I'd buy one as well for commuting and grocery getting, hands down. I'd definitely pay for the door. It is a nice, manufacturable design.
by Mikebergy
Mar 23 2016 4:38pm
Forum: E-Bike General Discussion
Topic: Q100 and Q128 with 0.35mm laminations
Replies: 254
Views: 29282

Re: Q100 and Q128 with 0.35mm laminations

neptronix wrote:I'm in a position to buy one too, and really want one..
Me too. I want a front and rear motor :D
by Mikebergy
Mar 02 2016 1:10am
Forum: E-Bike Technical
Topic: Lunacycles Charger - adjustable?
Replies: 33
Views: 4690

Re: Lunacycles Charger - adjustable?

Yes, I have a good multimeter, but was hoping for something nice without having to open the charger up. Luna basically told me they can't or don't want to offer a charger to me with the charger set to 12s. They suggested a balance charger setup to me (not what I want). A Satiator would be perfect i...
by Mikebergy
Mar 02 2016 1:09am
Forum: E-Bike Technical
Topic: Lunacycles Charger - adjustable?
Replies: 33
Views: 4690

Re: Lunacycles Charger - adjustable?

why would a company catering to, and selling chargers for 13s and 14s 18650 chargers bother with a 12s Lipo user. I just don't get the logic behind your complaint. What am I missing? Why wouldn't you want to sell a unit to someone if it was within your capability? It is not so much a complaint, as ...
by Mikebergy
Feb 25 2016 7:24pm
Forum: E-Bike Technical
Topic: Lunacycles Charger - adjustable?
Replies: 33
Views: 4690

Re: Lunacycles Charger - adjustable?

Yes, I have a good multimeter, but was hoping for something nice without having to open the charger up. Luna basically told me they can't or don't want to offer a charger to me with the charger set to 12s. They suggested a balance charger setup to me (not what I want). A Satiator would be perfect if...
by Mikebergy
Jan 25 2016 10:13pm
Forum: E-Bike Technical
Topic: bending 7075 T6 aluminium
Replies: 13
Views: 2226

Re: bending 7075 T6 aluminium

If you want it from 7075, why not just get the part machined, and eliminate the bending? Have any any calculations been done to see what actual loads will be on the part?
by Mikebergy
Jan 25 2016 9:44pm
Forum: Electric Aircraft
Topic: Elephant in the room - Quadcopters...
Replies: 190
Views: 32384

Re: Elephant in the room - Quadcopters...

You would not have to tilt the rotors, just tilt the whole aircraft forward and position the wings so they contribute to lift during forward flight. You have to do some calculations and airfoil selection to determine how much wing you wanted though. It is a good idea, I just don't like the idea of z...
by Mikebergy
Jan 25 2016 9:38pm
Forum: E-Bike Technical
Topic: Upping the Voltage
Replies: 25
Views: 1698

Re: Upping the Voltage

Going through the OPs other posts, I do not think I would trust those JumpStart batteries to be used at any respectable continuous load. They are made to operate for a few seconds to start a car, or at low load to power USB devices. I wish you the best of luck with them though. As for your voltage/s...