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by sendler2112
Jan 06 2013 2:39pm
Forum: E-Bike General Discussion
Topic: TYRES !!! ~ Which do you use ?
Replies: 50
Views: 9926

Re: TYRES !!! ~ Which do you use ?

Continental has an Ebike specific tire for heavy weight and high speed. The Schwalbe are a little pricey for high mileage use on the rear. . http://www.conti-online.com/generator/www/de/en/continental/bicycle/themes/city/E-Bike-tyres/ECONTACT/econtact_en.html . I would have to see how long they last...
by sendler2112
Jan 06 2013 12:49pm
Forum: E-Bike General Discussion
Topic: diy tubeless tires for ebike anyone?
Replies: 28
Views: 5388

Re: diy tubeless tires for ebike anyone?

I have been using a DIY tubeless conversion on my mountain bikes with standard tires for years. The Stan's tire valve set up with the tire just seating against the rim was prone to burping. Using a 24" tube for a liner/ valve instead has proven fool proof as the tube and tire bead are bonded togethe...
by sendler2112
Jan 06 2013 9:36am
Forum: Battery Technology
Topic: A123 20AHr Pouch Cell Battery Build & Info Thread
Replies: 985
Views: 142526

Re: A123 20AHr Pouch Cell Battery Build & Info Thread

I wonder how hot that plastic would have to get before it would melt and loosen up?
by sendler2112
Jan 05 2013 6:02pm
Forum: E-Bike General Discussion
Topic: Turn key Ebikes
Replies: 0
Views: 276

Turn key Ebikes

Sunny and 30F today with the roads clear from snow all the way to the shoulder so I went for a long bike ride. I needed a destination for me and my winter rat so I decided to make the 10 mile trip out to the Kawasaki dealer to drool over the new Ninja300 and talk to the owner about the used $4300 Br...
by sendler2112
Jan 04 2013 6:06am
Forum: Battery Technology
Topic: A123 20AHr Pouch Cell Battery Build & Info Thread
Replies: 985
Views: 142526

Re: A123 20AHr Pouch Cell Battery Build & Info Thread

Beautiful build. McMaster-Carr has brass cotter pins.
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http://www.mcmaster.com/#catalog/118/3356/=kvxvzv
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Are the main wires soldered onto a pin also?
by sendler2112
Jan 03 2013 10:24pm
Forum: Battery Technology
Topic: Hobby King LiFePo4
Replies: 53
Views: 9346

Re: Hobby King LiFePo4

These LiPO are really cheap right now. $0.43 per Wh would rival the best price on raw Amp20 cells at $0.35.
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http://www.hobbyking.com/hobbyking/stor ... ouse_.html
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by sendler2112
Jan 01 2013 11:38pm
Forum: Battery Technology
Topic: A123 20AHr Pouch Cell Battery Build & Info Thread
Replies: 985
Views: 142526

Re: A123 20AHr Pouch Cell Battery Build & Info Thread

I like the simple and serviceable clamp build of your battery. It seems like your motor is a bit hungry. 33 Wh/mile for 9 mph?
by sendler2112
Dec 31 2012 4:18pm
Forum: E-Bike Technical
Topic: DOT approved tires
Replies: 24
Views: 3928

Re: DOT approved tires

The Kenda Kwest is a great deal at $20 for a long wearing, high speed street tire. . http://www.biketiresdirect.com/product/kenda-k193-kwest-tire . They used to make a 26 x 1.95. That thing looks like a scooter tire with 3mm thick tread. . I run all my mountain bikes with standard tires running tubl...
by sendler2112
Dec 30 2012 8:22pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Kona Stinky GM BLT-500 mid drive- frame mounted batteries
Replies: 50
Views: 11712

Re: Kona Stinky with GM BLT-500 crank drive

Great build. That motor flys with 74v on it. Did it gain rpm all the way up to 2,300 with the overvoltage? I have a recumbent that I plan to use the BLT-800 with as I have plenty of room under the seat for a long (wide) motor. Thanks for the tip on the Staton-inc site. I was having trouble sourcing ...
by sendler2112
Dec 30 2012 8:21am
Forum: General Discussion
Topic: e-bicycle legal requirements sections ??
Replies: 21
Views: 1903

Re: e-bicycle legal requirements sections ??

Invariably, they are full of misinformation. Often they " summarize" the local vehicle codes and in the process misinterperet them. The law is very simple where I live in New York state USA. Electric bikes of any sort are expressly ILLEGAL! Yet NY City is full of them. . Hopefully the new 1000 Watt...
by sendler2112
Dec 29 2012 8:34pm
Forum: Motor Technology
Topic: GM BLT-800W bench racing
Replies: 49
Views: 10197

Re: GM BLT-800W bench racing

so high RPM operation is not going to be very good. Maybe it can do 1500rpm at ~80% efficiency? still kinda sad. The sprocket at the end is 14mm internally and fits a #41 chain. This is good news to me. The low rpm that is. I am planning a mid drive conversion for my recumbent. The intermediate sha...
by sendler2112
Dec 28 2012 6:08am
Forum: E-Bike Build Threads / Photos & Video
Topic: The Mid Drive Hub Motor Media Group
Replies: 124
Views: 51018

Re: The Mid Drive Hub Motor Media Group

Still on my first ones. Over 1000 miles easy plus tons of off road. The trick is to let off the power just a bit when you shift up, downshifting you can leave the power like when your climbing... Good to know. If a bicycle powertrain can hold up to operating mid drive for off road, it will easily t...
by sendler2112
Dec 26 2012 6:37am
Forum: E-Bike General Discussion
Topic: Back in the Saddle, 'Bent Mid-drive project!!
Replies: 135
Views: 33191

Re: Back in the Saddle, 'Bent Mid-drive project!!

I guess it would be pretty easy to knock together a half free wheeling jack shaft out of a bicycle rear wheel hub to mount on the bracket just in front of the mid drive motor. This would let the pedals freewheel and I could then play with the in and out gears to get the motor at 1000 rpm while the c...
by sendler2112
Dec 25 2012 1:59pm
Forum: E-Bike Build Threads / Photos & Video
Topic: The Mid Drive Hub Motor Media Group
Replies: 124
Views: 51018

Re: The Mid Drive Hub Motor Media Group

How is the chain and cassette life on these high powered mid drives?
by sendler2112
Dec 25 2012 8:55am
Forum: E-Bike General Discussion
Topic: The "Elf" Velomobile (new video)
Replies: 6
Views: 934

Re: The "Elf" Velomobile (new video)

A brave attempt. He has a lot of money tied up in the design. It's a bit wide. Eventually people will have to get used to the idea of sharing the road with such vehicles. If it could go 40 mph it wouldn't be in the way on a street.
by sendler2112
Dec 24 2012 8:02pm
Forum: E-Bike General Discussion
Topic: Back in the Saddle, 'Bent Mid-drive project!!
Replies: 135
Views: 33191

Re: Back in the Saddle, 'Bent Mid-drive project!!

That is a photo of a Goal although I actually have the rear suspended 26" high racer and have a front fork that should fit the head tube to suspend the front. The rear is 9 speed with an XT derailleur. Pro bike racers can average 450 Watts for an hour and sprint at 1500 watts for 90 seconds. These g...
by sendler2112
Dec 24 2012 12:28pm
Forum: E-Bike General Discussion
Topic: Back in the Saddle, 'Bent Mid-drive project!!
Replies: 135
Views: 33191

Re: Back in the Saddle, 'Bent Mid-drive project!!

Great thread. I have a Performer dual suspended 26" recumbent to build as an electric commuter and am weighing the options of a Clyte 3540 rear vs mid drive. I have an idler midway back already so this would seem a good place to mount a motor. The rear suspension would work better without the added ...
by sendler2112
Dec 23 2012 5:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: High power RC motor and drive unit production
Replies: 1181
Views: 140339

Re: High power RC motor and drive unit production

Could your kit work for me to convert my Performer high racer 26". I am thinking mid drive is quite convenient for a recumbent since I have an idler pulley right in the middle already.
by sendler2112
Dec 23 2012 8:54am
Forum: Battery Technology
Topic: Bottom balancing?
Replies: 479
Views: 31964

Re: Bottom balancing?

amberwolf wrote:(which could have easily been found in a quick search ;)).
Sorry. I did search. "bottom balancing". And it did not come up. Good information. Thanks for finding it for me. I will have to remember to go out to Google for searching Endless-sphere where it would have probably come right up.
by sendler2112
Dec 22 2012 10:27pm
Forum: Battery Technology
Topic: Bottom balancing?
Replies: 479
Views: 31964

Bottom Balancing

So these guys on EVTV just bottom balance their big LiFe prismatic packs so that all the cells are 2.75v and then rarely ever have to balance again by choosing a bulk hvc based on an average cell hvc on the low side of 3.65v. Some cells will always bulk charge up to 4.1v while others will be at 3.5v...
by sendler2112
Dec 21 2012 5:25pm
Forum: Battery Technology
Topic: A123 Nanophosphate white paper
Replies: 4
Views: 733

Re: A123 Nanophosphate white paper

I haven't seen that happen. Are there any videos of it. I have seen Amp20 cells shot through with a shotgun and cleaved with a hatchet without even getting hot. The shot through one still made 3.2v. It would have been fun to see a capacity test of that one with the giant hole in it. These appear to ...
by sendler2112
Dec 21 2012 12:26pm
Forum: Battery Technology
Topic: A123 Nanophosphate white paper
Replies: 4
Views: 733

A123 Nanophosphate white paper

Here is the white paper from A123 explaining the nano tech design of their electrodes.
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http://info.a123systems.com/Portals/133 ... sphate.pdf
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by sendler2112
Dec 20 2012 11:14pm
Forum: E-Bike General Discussion
Topic: Heated handle bar grip pads
Replies: 6
Views: 869

Re: Heated handle bar grip pads

I wired up my Venture Heat 12v glove liners on my CBR250R yesterday. They provide nice heat all around the fingertips.
by sendler2112
Dec 20 2012 6:59pm
Forum: Battery Technology
Topic: What is the difference between Lipo and lifepo4?
Replies: 16
Views: 13016

Re: What is the difference between Lipo and lifepo4?

Excellent charge and discharge videos of GBS and A123 cells on youtube. . http://www.youtube.com/watch?v=VxZF8J7wrww . http://www.youtube.com/watch?v=RYOZUteqNEg . . Here are the discharge and charge curves for 8s GBS cells. The A123 Amp20 cells were almost exactly the same voltages. Many people hav...