Thanks for the links Lyle, much appreciated... Food for thought. I really like the custom frame in the link below.
http://www.htl-hl.ac.at/hauptseite/news/030701evncup03/Seiten/p30.htm -Charley --- [EMAIL PROTECTED] wrote: > Send ListServ mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > > http://electricmotorcycles.net/mailman/listinfo/listserv_electricmotorcycles.net > > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of ListServ digest..." > > > Today's Topics: > > 1. Re: AGM orientation ([EMAIL PROTECTED]) > 2. Re: AGM orientation (Mark Dodrill) > 3. Re: AGM orientation (Mike) > 4. Re: some electric motorcycle articles and vids (lyle sloan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 19 Nov 2005 23:15:24 EST > From: [EMAIL PROTECTED] > Subject: Re: [ElectricMotorcycles] AGM orientation > To: [EMAIL PROTECTED] > Cc: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="us-ascii" > > Jody, > I'm going to copy this to the list to get opinions from other EV MC > folks. > > I don't know much about the Hawkers. Does anyone out there have any > experience to share about the Hawkers in an electric motorcycle? > > My current 72v AGM battery weight is 258#s with 45 - 65 AHs each > depending > on whose spec you believe. This should produce 4680 WHrs (72v X > 65AH). While > the Hawkers would produce only 3120 WHrs (120v X 26). Are my > calculations > correct? > > In terms of peak KW of power my configuration would in theory produce > ~25KW > of power (or 33.7 peak HP) at 350 amps. While 120 volts at 450 amps > would > produce ~54KW or 72 HP. > > What about the charging profile? What chargers work well with > Hawkers? > > Can you send along the measurements so I can do some rough space > planning? > Do you believe that because they are smaller that a more creative > configuration is possible? > > > I have been wondering if one went above say 450 (motor) amps (aka > Altrax) > would it be necessary to modify the standard ADC motor? Also I see > where the > D&D are supposed to be a bit more stout that the ADC 6.7, but some > of the D&Ds > are also 15" long as opposed to 10.5". The Warp guys are looking at > bringing > out a new 6.7 or 7", but not much info yet. > > Long story short I am wondering if we would need to have Jim Husted > at > Hi-Torque do some serious preventative measures if one were to head > north of 500+ > motor amps in the 6.7" class? > > If you are able to get some higher voltages that would seem to > improve > range, but I have always been under the impression that more amps > equals better > acceleration (which is my goal). If I were to go up, I would > probably just go > to 96 volts as a first step and see what the actual results are like > first. > > - Mike B > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://electricmotorcycles.net/pipermail/listserv_electricmotorcycles.net/attachments/20051119/59f069cf/attachment-0001.htm > > ------------------------------ > > Message: 2 > Date: Sat, 19 Nov 2005 21:08:23 -0800 > From: Mark Dodrill <[EMAIL PROTECTED]> > Subject: Re: [ElectricMotorcycles] AGM orientation > To: ElectricMotorcycles <[email protected]> > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > On 11/19/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > My current 72v AGM battery weight is 258#s with 45 - 65 AHs each > depending > > on whose spec you believe. This should produce 4680 WHrs (72v X > 65AH). While > > the Hawkers would produce only 3120 WHrs (120v X 26). Are my > calculations > > correct? > > > You are right about the formula: > Amp Hours * Volts = Watt Hours > The trick is figuring out how many amp hours you will actually get > out, > which depends on how fast you drain it, and the Peukert factor at > that drain > level. EV cars should have a much higher average amp load on the > batteries, > which is why they are downrated so much. The figure I have heard > before is > the standard 12v Yellow Top is 400 watt hours, in an EV car (~33 amp > hours > instead of the rated 45). > If you don't know what the average discharge rate is (probably don't > know, > unless you have tried before), I would recommend derating it 25% in > terms of > the number of amp hours you can get out to get to 100% discharge. > Then, you have to derate it again, to account for the fact that it > is bad > for AGMs to be fully discharged. Some say don't go below 80% typical > discharge, some say only 50%. From the data I've seen, 50% is the > better > number, since the expect number of cycles goes dramatically up as > compared > with the 80% discharge numbers. > > In terms of peak KW of power my configuration would in theory > produce > > ~25KW of power (or 33.7 peak HP) at 350 amps. While 120 volts at > 450 amps > > would produce ~54KW or 72 HP. > > What about the charging profile? What chargers work well with > Hawkers? > > > I would recommend Rich Rudman's PFC charger > (www.manzanitamicro.com<http://www.manzanitamicro.com>). > I borrowed a Beta unit for a while and it was awesome. Extremely > efficient, > top notch knowledge and service, and almost fully automates AGM > charging. > > If you are able to get some higher voltages that would seem to > improve > > range, but I have always been under the impression that more amps > equals > > better acceleration (which is my goal). If I were to go up, I would > probably > > just go to 96 volts as a first step and see what the actual results > are like > > first. > > > In my experience, there are three main advantages of going to a > higher > voltage: > 1. More batteries equals more range, since you have more stored > energy > available > 2. Higher voltage means lower losses at the higher amp draws and less > loss > to the Peukert factor > 3. Your average amp draw will go down, since it takes fewer amps at > the > higher voltage to get the same watts > Of course, this has to be balanced against the other factors: > 1. Overall weight may be too much > 2. May have to change charger/controller > 3. Space limitations > 4. Maintenance and battery failure possibilities increase > 5. More $$ to by more batteries > > -- > Mark > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://electricmotorcycles.net/pipermail/listserv_electricmotorcycles.net/attachments/20051119/4e482b56/attachment-0001.htm > > ------------------------------ > > Message: 3 > Date: Sun, 20 Nov 2005 10:48:02 -0500 > From: Mike <[EMAIL PROTECTED]> > === message truncated === __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com
