Search found 178 matches

by StevenR
Feb 15 2011 7:57pm
Forum: Battery Technology
Topic: Ping pack. Worry free, fool proof?
Replies: 43
Views: 3128

Re: Ping pack. Worry free, fool proof?

Ping is all good. I have a 48V20aH v3 (unadvertised but available if you ask). 5000 miles in 18 months and still over spec. I have abused it badly with the 60 amp BMS tripping frequently when I drive a 5303 with one of methods monster controllers. I usually run a 48V40A controller with no BMS cutout...
by StevenR
Apr 07 2010 10:26pm
Forum: E-Vehicles General Discussion
Topic: Apple iPad as a dashboard display?
Replies: 26
Views: 2636

Re: Apple iPad as a dashboard display?

I considered an i-something but decided against it. I went with an Archos 5IT. It is Android so the development environment is free (Eclipse) and the apps martketplace is completely open. It has GPS, WiFi, Bluetooth, PMP and FM Radio. I got a Bluetooth receiver for my helmet (Giro Revolver Helmet wi...
by StevenR
Mar 24 2010 12:03am
Forum: E-Bike General Discussion
Topic: requirements for selecting a bike to convert? (to an ebike)
Replies: 28
Views: 3824

Re: requirements for selecting a bike to convert? (to an ebi

I bought a Motobecane hardtail at bikesdirect.com for my 5303 rear disk motor. I would like steel but it is probably out of the question as getting the complete bike and just mounting the motor is way cheaper and easier than building it up. Here's a $399 disk brake frame of similiar quality http://w...
by StevenR
Feb 23 2010 5:30pm
Forum: Battery Technology
Topic: Advice Needed - Headway vs Thundersky
Replies: 58
Views: 5608

Re: Advice Needed - Headway vs Thundersky

I hate to add more potential confusion, but the cells being offered by cellman (I think they are still offered - I can't find the sale thread - here's some info http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=15408 ) outperform just about anything. Cost may be a bit higher - $2.00/aH - but...
by StevenR
Feb 22 2010 9:07pm
Forum: Polls & Surveys
Topic: SURVEY: Your watts at various speeds
Replies: 48
Views: 35512

Re: SURVEY: Your watts at various speeds

I will make a quick post then update it later to keep to the one post per person idea. I soon will have three complete systems with all interchangeable parts so documenting all the possible combinations is unlikely - although putting some numbers to a 5303 Front/5303 Rear powered by a 120V of series...
by StevenR
Feb 22 2010 8:41pm
Forum: General Discussion
Topic: Why Donate??
Replies: 121
Views: 10313

Re: Why Donate??

I just kicked in $25 as what I consider buy in to the discussion. I'm the one that made the "I don't care if you use it to support your crack habit" comment, to distinguish it from the other $25 contributions. Those who aren't going to contribute under any circumstances should probably just shut up....
by StevenR
Feb 16 2010 7:28pm
Forum: E-Bike General Discussion
Topic: snow ebiking anyone?
Replies: 30
Views: 2815

Re: snow ebiking anyone?

I'll have to try the deep stuff. I have 26" Schwalbe Ice Spiker Pro's on a disk brake motobecane front-suspension 5303 rear/48V35A Clyte controller/48V20aH Ping v3. I have put 200 miles+ (300? I have to look) with spikes but have not gone out on the roads when it was much deeper than three or four i...
by StevenR
Feb 16 2010 7:13pm
Forum: E-Bike General Discussion
Topic: Ninecontinents
Replies: 15
Views: 1095

Re: Ninecontinents

I am pretty sure ebikes.ca will ship just about anywhere in the world and have 9C and Crystalyte motors - I just ordered a 9C five turn motor on a 26" MTB rim. Get a 48V35A 12FET controller and hot-rod it a little bit - there are several available on the forum all set to go. Contact Ping and ask for...
by StevenR
Feb 10 2010 10:35pm
Forum: Battery Technology
Topic: Bottom balancing?
Replies: 479
Views: 27076

Re: Jack Rickard-different advice for lifepo4

...Oh yeah. It also charges each cell at the lowest possible rate so that it just reaches full charge when I need to use it again. It will know when I need it again by using bidrectional brainwave communications...
by StevenR
Feb 10 2010 10:33pm
Forum: Battery Technology
Topic: Bottom balancing?
Replies: 479
Views: 27076

Re: Jack Rickard-different advice for lifepo4

Just found the thread and have read it without hitting much of Jack's stuff external to the forum but will do so but I just want to say that I agree with everybody. It seems to me that Jack's premise, which is valid when not arguing with other valid perspectives, is that counting the power in and ou...
by StevenR
Feb 10 2010 8:48pm
Forum: Battery Technology
Topic: Ping balance problems ?
Replies: 11
Views: 1174

Re: Ping balance problems ?

I have a 48V20aH Ping v3 with the 60A BMS. I am using a 5V Ping aluminum case charger set to go Constant Voltage (CV) at 60.22V. It may take several hours after the LED's light up for the charging current to drop down to less than 100mA where I consider the battery to be balanced. Cell voltages are ...
by StevenR
Feb 04 2010 1:05am
Forum: Battery Technology
Topic: New Turnigy liFe packs
Replies: 63
Views: 7879

Re: New Turnigy liFe packs

I got 1100wh measured by CA and have gotten there on several occasions. The CA power delivered wh matches the recharge wh measured by two different wattsup meters within about 2% (+ or -, mostly depending on when you call it charged - it will "charge" at 0.09A forever) every time. That should negate...
by StevenR
Feb 04 2010 12:34am
Forum: Battery Technology
Topic: RC Hydrogen Fuel Cell - eBikes Next?
Replies: 17
Views: 1692

RC Hydrogen Fuel Cell - eBikes Next?

engadget has a story on a fuel cell for RC Cars... http://www.engadget.com/2010/02/03/horizon-debuts-h-cell-2-0-hydrogen-fuel-cell-system-for-r-c-cars/ It makes an RC car go 50mph for 45 minutes. "Hydrogen is stored in a metal matrix". It is called a hybrid so it sounds like it has a battery. They a...
by StevenR
Feb 02 2010 7:21pm
Forum: Battery Technology
Topic: New Turnigy liFe packs
Replies: 63
Views: 7879

Re: New Turnigy liFe packs

...continuing because the editor goes wacko after a certain number of lines... I think the Ping v3 is still the leader in established non-vaporware. The new cells by the manufacturer we shall not name for sale here... http://www.endless-sphere.com/forums/viewtopic.php?f=9&t=14832 ...kick all the but...
by StevenR
Feb 02 2010 7:10pm
Forum: Battery Technology
Topic: New Turnigy liFe packs
Replies: 63
Views: 7879

Re: New Turnigy liFe packs

replyt to liveforphysics Spec. Minimum Capacity: 4500mAh Configuration: 6S2P / 19.8v / 12Cell Constant Discharge: 30C Peak Discharge (10sec): 40C Pack Weight: 899g Pack Size: 141 x 43 x 75mm Charge Plug: JST-XH Discharge plug: 4mm Bullet-connector If I'm not mistaken, this is the best performance Li...
by StevenR
Feb 01 2010 10:53pm
Forum: E-Bike Technical
Topic: Studded bike tires, selection and first ride impressions
Replies: 23
Views: 5544

Re: Studded bike tires, selection and first ride impressions

Much more positive comments than for the similar Nokian's. I guess I'll envy those tires on the trail. Still not sure it is the best for paved road use though. Roads have bare sections, poorly plowed snowy sections and icy patches. A commuter tire has to perform well on all. Their road handling doe...
by StevenR
Feb 01 2010 7:41pm
Forum: Battery Technology
Topic: Wh ( watthour) standard growing in popularity
Replies: 13
Views: 1178

Re: Wh ( watthour) standard growing in popularity

I much prefer wh. My Ping v3 "48V20aH" produces at least 1100wh. My rate is watts and my consumption is in wh/mile. Watts count up linearly to maximum and I know what I need to do to get where I am going. The wh/mile "rate" (instantaneous product of watts divided by speed) is not shown on the CA tho...
by StevenR
Jan 26 2010 9:44pm
Forum: E-Bike Technical
Topic: How much torque on the rear nuts?
Replies: 18
Views: 1867

Re: How much torque on the rear nuts?

Check out the fork spin-out thread at...
http://endless-sphere.com/forums/viewto ... =2&t=14195
If that thread doesn't answer any question you have ever had on this topic, send him your frame for destructive testing...
by StevenR
Jan 26 2010 9:39pm
Forum: E-Bike Technical
Topic: Studded bike tires, selection and first ride impressions
Replies: 23
Views: 5544

Re: Studded bike tires, selection and first ride impressions

I blew the wab on the Schwalbe Ice Spike Pro's. Nice. 361 aluminum jacketed tungsten carbide spikes on a skinwall tire. Every knob that sticks out has a spike on it. It leaves nasty, deep scratches on any surface known to man, unless you are riding a diamond road. OK road performance - 20%higher dra...
by StevenR
Jan 25 2010 8:03pm
Forum: Battery Technology
Topic: Breaking in new lifepo4 battery, ping 48v 15 ah
Replies: 24
Views: 3283

Re: Breaking in new lifepo4 battery, ping 48v 15 ah

BTW: do you get the random blinking if you leave a charged battery sitting off-charge?

**EDIT: DOPE! I guess I should read the posts better!**
by StevenR
Jan 25 2010 7:57pm
Forum: Battery Technology
Topic: Breaking in new lifepo4 battery, ping 48v 15 ah
Replies: 24
Views: 3283

Re: Breaking in new lifepo4 battery, ping 48v 15 ah

I have watched my 48V20aH Ping v3 for better than 2000 miles and it seems that the BMS is charging for a long time after the lights come on. I have a WattsUp in the charge line and the lights come on when the charger is delivering 200mA or so. It can take several hours for the current to drop to 80m...
by StevenR
Jan 11 2010 6:35pm
Forum: E-Bike General Discussion
Topic: 48v through a 24v on/off switch ?
Replies: 9
Views: 1791

Re: 48v through a 24v on/off switch ?

Yes, there is a big surge when the caps charge on initial start-up which will cause a spark at the contacts of the switch. A pre-charge resistor is used to slowly bring the caps up to voltage and supress the initial spark. The pre-charge resistor and low-current switch would be put in parallel with ...
by StevenR
Dec 10 2009 5:51pm
Forum: E-Vehicles General Discussion
Topic: New motor controller brainstorm
Replies: 175
Views: 14075

Re: New motor controller brainstorm

Serial data output to remote device. I am working on an Android application that will incorporate GPS data, battery BMS (cell voltage) data and CA data. If I can avoid using the CA at all, that saves $125.00 that can go into the controller.
by StevenR
Dec 09 2009 10:00pm
Forum: Battery Technology
Topic: Ping V3 Reports
Replies: 44
Views: 6305

Re: Ping V3 Reports

Those measurements are battery only. You need to allow a little for the BMS...
by StevenR
Dec 06 2009 9:57pm
Forum: Battery Technology
Topic: Ping V3 Reports
Replies: 44
Views: 6305

Re: Ping V3 Reports

The scale I have in the appropriate range only weights to the nearest half pound but I get 21 pounds for the Pingv3 if I just put it on the scale or if I pick it up and weigh myself with and without it. I get 14 pounds for a 48V10aH Headway on the scale alone, 13.5 pounds me with and without it, for...