EV digest 4475
EV Digest 4475 Topics covered in this issue include: 1) Re: DC/DC...so much for being smart by Lee Hart [EMAIL PROTECTED] 2) Re: Electrothon bubble by Rush [EMAIL PROTECTED] 3) Re: JeepEV Drivetrain (was: Re: Oozing Motor?) by Nick Viera [EMAIL PROTECTED] 4) Re: JeepEV Drivetrain (was: Re: Oozing Motor?) by Nick Viera [EMAIL PROTECTED] 5) Re: DC/DC...so much for being smart by Neon John [EMAIL PROTECTED] 6) E-Bike 36v 10ah Li-Po Battery Pack UK test purchase. by Peter Perkins [EMAIL PROTECTED] 7) Re: E-Bike 36v 10ah Li-Po Battery Pack UK test purchase. by reb [EMAIL PROTECTED] 8) Rules of thumb for engine, Generator Eff question. Re: Jerry by jerry dycus [EMAIL PROTECTED] 9) Why Diesel costs more than gas in Florida by Stu or Jan [EMAIL PROTECTED] 10) Re: Netgain Vs ADC, More Comments by Mark Ward [EMAIL PROTECTED] 11) Engine Generator Question by Marvin Campbell [EMAIL PROTECTED] 12) Re: Engine Generator Question by [EMAIL PROTECTED] 13) Re: Idea for a high current interrupr device by Mark Farver [EMAIL PROTECTED] 14) Re: engine Generator question. by Lee Hart [EMAIL PROTECTED] 15) Re: engine Generator question. Re: Jerry by Lee Hart [EMAIL PROTECTED] 16) OT Re: Engine Generator Question by jerry dycus [EMAIL PROTECTED] 17) RE: Engine Generator Question by Stu or Jan [EMAIL PROTECTED] 18) Re: Idea for a high current interrupr device by Peter VanDerWal [EMAIL PROTECTED] 19) Re: Idea for a high current interrupr device by Duncan Orthner [EMAIL PROTECTED] 20) DCP electronics in closed space? by Ben Apollonio [EMAIL PROTECTED] 21) Re: Netgain Vs ADC, More Comments by John Wayland [EMAIL PROTECTED] 22) Almost Submerged the Heavy Metal Garden Tractor! by John Wayland [EMAIL PROTECTED] ---BeginMessage--- Tom Watson wrote: Hi folks This is something that confuses me... why would you not use a charge controller and a dc to dc converter to intelegently charge your 12 volt battery, including setting the charge rates, the equilazation charge, preventing over chargeing, and monitoring the battery usage? It seems this would protect your investment, improve reliability and prevent embarassing battery failure! You should... but nobody does. We know that batteries last longer with a good charger, and that improper charging shortens their life. Yet, we blindly use constant-voltage power supplies for the 12v accessory battery. I think it's because a) that's what ordinary cars do, and b) people care more about a constant voltage to run their lights, wipers and radio (so they don't flicker, change speed, or change volume) than they do about its long-term effect on the battery. -- *BE* the change that you wish to see in the world. -- Mahatma Gandhi -- Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net ---End Message--- ---BeginMessage--- Back when I was a model maker for Point of purchase displays, we made clear plexiglass prototypes using a Pizza oven and letting the plexi get to a sag temperature and then draping it over a form. The form could be any shape, usually it was a cylindrical shape, and was covered in felt. We had a precise form to make and letting it sag down as in the hpv method was not exact enough. If the plexi was the right temp, it would be clear, but if it was too hot it would sometimes take the texture of the felt. We would clamp the ends down so the plexi would not spring back upon cooling. Just another possible way of fabrication. Rush Tucson AZ www.ironandwood.org - Original Message - From: Jeff Shanab [EMAIL PROTECTED] To: Electric Vehicle Discussion List ev@listproc.sjsu.edu Sent: Saturday, July 02, 2005 5:25 PM Subject: Re: Electrothon bubble http://www.wisil.recumbents.com/wisil/bubbles/hpvbubbles.htm I found an article! ---End Message--- ---BeginMessage--- Hi, David Dymaxion wrote: Thanks Nick for the details and pictures. No Problem! I try to get lots of photos of my projects/progress because, well..., a picture is worth a thousand words (or so they say). ;-) But seriously, I try my best to get lots of good photos and info up and organized on my website, in an attempt to completely document my Jeep EV conversion (and those to come). When I was first looking into building an EV, I visited many websites. Most of the ones I found at the time were either unfinished, extremely outdated, or very hard to read/navigate due to poor organization/design, broken links, etc.. and thus were discouraging. But luckily I did find some good sites as well, which were very informative and helped inspire me, like Jerry Halstead's site and Ken Norwick's site for example. My hope is that I can give back to others (i.e. potential EV converters) in this way through DriveEV.com -- -Nick
EV digest 4476
EV Digest 4476 Topics covered in this issue include: 1) Re: Netgain Vs ADC, More Comments by Mark Ward [EMAIL PROTECTED] 2) Re: Netgain Vs ADC, More Comments by John Wayland [EMAIL PROTECTED] 3) Re: Netgain Vs ADC, 11 netgain by john bart [EMAIL PROTECTED] 4) Re: State of Charge calculations by Rod Hower [EMAIL PROTECTED] 5) Re: Netgain Vs ADC, More Comments by Ryan Stotts [EMAIL PROTECTED] 6) by Peri Hartman [EMAIL PROTECTED] 7) Re: Engine Generator Question by Neon John [EMAIL PROTECTED] 8) Re: engine Generator question. by Neon John [EMAIL PROTECTED] 9) RE: Engine Generator Question by djsharpe [EMAIL PROTECTED] 10) Re: Netgain Vs ADC, 11 netgain by Roy LeMeur [EMAIL PROTECTED] 11) Re: Netgain Vs ADC, 11 netgain by John Wayland [EMAIL PROTECTED] 12) unsubscribe by Eric Lambert [EMAIL PROTECTED] 13) Re: engine Generator question. by toltec [EMAIL PROTECTED] 14) Remove me from the list by Ivan Workman [EMAIL PROTECTED] 15) Very OTRe: Engine Generator Question by jerry dycus [EMAIL PROTECTED] 16) How to Un-subscribe from the EVDL by Mike Chancey [EMAIL PROTECTED] 17) : Netgain , 11 sighting by STEVE CLUNN [EMAIL PROTECTED] 18) Re: A Diesel/Electric car possibility by David Roden [EMAIL PROTECTED] 19) Re: Idea for a high current interrupr device by Neon John [EMAIL PROTECTED] 20) Re: Very OTRe: Engine Generator Question by Neon John [EMAIL PROTECTED] 21) Re: Almost Submerged the Heavy Metal Garden Tractor! by David Roden [EMAIL PROTECTED] ---BeginMessage--- Yes, to the higher ahrs of a larger, heavier, bulkier Trojan wet cell, but even this is only if you keep the amp draw at very low levels. Take the BIG amps out of them like you can do with an Optima, and that ahr advantage evaporates to where you get more from the same weight in Optimas, than you'll ever get out of Trojans. These comments also apply to the other two big names in high power AGMs, like Hawker and Exide Orbital. Saying an last me a long time. In this application, they are a better choice over an AGM See Ya.John Wayland Honestly I was looking at the amphour ratings. There seems to be a lot of different yellow tops available. When you see 100+ah on a flooded battery it is easy to get a false sense of power I suppose. The optima website shows 40-50ah I will say the idea of not having a mess or hydrogen gas is a plus. I will have to access my battery box capacity and make sure I have room for 12 of whatever I am using in the back. I can fit a square box with about 35 on each side under the hatch. I won't have a lot of room under the hood for more batteries once the motor and the original accessory mount (from the ICE) for the power steering, A/C etc. is reinstalled on the motor platform. You are right. I don't want to limit myself to 400 amps if I am using a 1000amp capable controller either. BTW.. Blue Meanie is a fantastic vehicle! I was looking at the information on the web. Mark ---End Message--- ---BeginMessage--- Hello Mark and All, Mark Ward wrote: Honestly I was looking at the amphour ratings. There seems to be a lot of different yellow tops available. When you see 100+ah on a flooded battery it is easy to get a false sense of power I suppose. The optima website shows 40-50ah Yes, it is easy to get a false impression of power, and the reason I like to respond to posts like yours. Some, who evidently don't know me as well as they think they do, think I hate flooded batteries...not true. I 'do' prefer good, solid, powerful AGMs, but only if they fit the application intended. Mark wrote: The problem I see with the Optimas is they don't have the current or amp hour rating of some of the Trojans... I needed to correct that notion. You are right. I don't want to limit myself to 400 amps if I am using a 1000amp capable controller either. On the plus side of thisyou can still limit your battery pack's current to 400 amps, and still have the Zilla jam 1000 into the drive motor, but only while the voltage being delivered to the motor is about half that of the pack's voltage. Once the rpm rises and you keep asking for full throttle, the motor current will be rolled back towards that 400 limit of the battery pack, and this is where your acceleration will fall like a rock. With this setup, you can have a flooded fed EV that has snappy off-the-line performance, but tame 0-60 performance and weak hill climbing abilitynot so bad, but not nearly what you can get with a higher voltage pack of AGMs. BTW.. Blue Meanie is a fantastic vehicle! I was looking at the information on the web. Thanks, but realize that its capabilities aren't for everyone. Yes, it has very strong acceleration and top speed performance, yes, it's way fun
