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  1. StevenR

    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...
  2. StevenR

    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...
  3. StevenR

    requirements for selecting a bike to convert? (to an ebike)

    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...
  4. StevenR

    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 -...
  5. StevenR

    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...
  6. StevenR

    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...
  7. StevenR

    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...
  8. StevenR

    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...
  9. StevenR

    Bottom balancing?

    ...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...
  10. StevenR

    Bottom balancing?

    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...
  11. StevenR

    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...
  12. StevenR

    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...
  13. StevenR

    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...
  14. StevenR

    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...
  15. StevenR

    New Turnigy liFe packs

    replyt to liveforphysics IMHO... The list is not quite right or complete, depending how you look at it. The volume is not the variable of concern (within reason), it is mass - pounds(kg)/wh. At a certain capacity the power issues - instantaneous watts - are really moot. I get by nice on 80A...
  16. StevenR

    Studded bike tires, selection and first ride impressions

    Their road handling does leave something to be desired. Pressure is critical with a 5303 rear and a 48V20aH Pingv3 over the rear tire. Too soft and it wiggles all over the place. Too much pressure and the rim is toast. Normally too little pressure toasts the rim but the handling goes away so...
  17. StevenR

    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...
  18. StevenR

    How much torque on the rear nuts?

    Check out the fork spin-out thread at... http://endless-sphere.com/forums/viewtopic.php?f=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...
  19. StevenR

    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...
  20. StevenR

    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!**
  21. StevenR

    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...
  22. StevenR

    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...
  23. StevenR

    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.
  24. StevenR

    Ping V3 Reports

    Those measurements are battery only. You need to allow a little for the BMS...
  25. StevenR

    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...
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