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Today's Topics:
1. draggin' (Richard Acuti)
2. Re: * Discover agms ? (Roger Stockton)
3. Re: Cheaper speed controllers and motors are needed for EV
world. (Tommey Reed) (keith vansickle)
4. Re: Tesla and Hyatt (Evan Tuer)
5. Re: * Discover agms ? (Jeff Major)
6. Re: Blowers (battery box fans) (Adrian DeLeon)
7. RE cheap controllers (wayne alexander)
8. Re: Tesla and Hyatt (Evan Tuer)
9. Re: Brusa NLG5 Air Flow Direction? (Mark McCurdy)
10. Re: broken motor for sale (Mark McCurdy)
11. smallest car (wayne alexander)
12. Re: EV Digest, Vol 3, Issue 85 (Sarah & Erik)
----------------------------------------------------------------------
Message: 1
Date: Wed, 31 Oct 2007 13:23:51 -0400
From: Richard Acuti <[EMAIL PROTECTED]>
Subject: [EVDL] draggin'
To: <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"
This is going to be a slow, painful day.
_________________________________________________________________
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------------------------------
Message: 2
Date: Wed, 31 Oct 2007 10:37:40 -0700
From: Roger Stockton <[EMAIL PROTECTED]>
Subject: Re: [EVDL] * Discover agms ?
To: "'Electric Vehicle Discussion List'" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Seth Myers wrote:
> Yesterday I went to the local batery distributor to pick up a
> Trojan T105 or T125 [...] preached to me the virtues of
> the Discover dry cell (agm).
>
> The chief virtues are the following:
>
> - no acid (esp since 10 will sitting in the interior
> compartment (we'll have adequate bracing/protection);
> - no hydrogen gasing
> - no acid spray
> - costs about 2x ($325 ish vs $170 ish) as much, but last 2 -
> 2.5x as long
I think you'll find that this is just the usual price differential between
floodies and AGMs. Compare the cost of the Discovers to other AGMs of similar
size and you'll likely find them to be quite competitive.
> and they seem to have pretty decent performance
> characteristics (124 minutes rc at 75 vs 115 for Trojans, I
> think) so it just seems to be a matter of buying 4-6 yrs.
> worth of batteries up front vs. 2-3. (??)
I've cycled Discover's L16 and T105-size 6V AGMs and they will deliver their
rated capacity at 75A.
> I had initially shied away from Discover when I heard
> they were essentially agm, meaning in my mind 200-300 cycles
> before going kaput, but it looks like they are more like
> 1000-1100 cycles at 50% dod (compare vs Trojan's specs of 438
> cycles T105, 492 cycles for T125).
They aren't essentially AGMs, they are exactly AGM.
The Trojan numbers you refer to sound like their "lifetime eneregy unit" (LEU)
ratings, not cycles. A 6V flooded battery is typically rated to about 700
cycles @ 80%DOD, and this will increase dramatically at shallower DOD, just as
it does for the AGMs.
Without digging up the Discover specs to fins a cycle vs DOD plot, I would
expect them to deliver about 300-400 cycles @ 80%DOD, or about 1/2 the cycles
of the floodeds. Despite this, they *do* apparently last longer in certain
applications than floodies simply because floodies often die well before their
rated cycle life due to lack of maintenance and other operationsla abuses. If
your floodies die in 12-18months and the Discovers (which require no
maintenance) last 24-36months, then one can honestly state that the Discovers
last 2x as long.
> I recall Firefly said their lead acid battery
> would end up being something like 5x in price a regualr lead
> acid, so since this is just 2x, these seem like a midway step
> in the firefly direction ...
Not quite. To their credit, the Firefly folks compared their projected prices
to those of present AGMs (not floodeds). That is, the Firefly is predicted to
cost about 1.5-2x the cost of your Discover (or any other) AGMs, not 1.5-2x the
cost of floodies.
There is also nothing revolutionary about the Discovers; they are just a decent
quality AGM.
As to actual EV use, I'm not aware of anyone using the 6V modules. Randy at
CEV has built a few Neons running packs of the Discover EV31A-As and has been
quite pleased with the performance. I've got a 120V set of the Discover
EV34A-As in my EV at the moment. It is too early for me to say anything about
their cycle life, but my first impression is that the EV34A-As are not as stiff
as the elderly Optima YTs they replaced. I would not recommend them to someone
as a less costly power battery than Optimas, Orbitals, or Hawker/Odesseys.
However, the EV34A-A is pretty much a drop-in replacement physically for the
Optima Group 34 YT. The main difference is that the EV34 is a more
conventional flat-plate construction, and has the threaded insert style
terminals rather than the automotive SAE posts. The EV34s are 70Ah and 50lb vs
the 50 (55Ah?), 43lb YT.
If you are the sort who looks after your batteries, then it would be difficult
to recommend any sealed battery over floodies in terms of cost. You will need
a decent charger to hope to approach the rated cycle life for any type of
battery. If you need to locate batteries in the passenger compartment or
someplace where access for routine maintenance will be difficult, then sealed
batteries may be appropriate. If you want a stiffer pack, then AGMs may be
appropriate.
Note that Discover makes sealed batteries in both gel and AGM types, and the
gels tend to have longer rated cycle life than the AGMs. If your application
will use discharge rates compatible with the gel ratings, you might be better
off using them than the AGMs. This is especially true if you are considering
large sealed 6Vers since even a very modest 2-3C rate is 450-700A for a
225Ah-ish module. If you decide to consider gels, you might want to comparison
shop against the DEKA/East Penn and Sonnenschein 6V gels since these brands are
typically associated with high-quality gels.
Discover's site is at <http://www.discover-energy.com/>.
Cheers,
Roger.
------------------------------
Message: 3
Date: Wed, 31 Oct 2007 10:57:06 -0700 (PDT)
From: keith vansickle <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Cheaper speed controllers and motors are needed
for EV world. (Tommey Reed)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Arak and all on the list.
The www.electricdragin.com is just such a forum/EVent.
bring more than pictures bring your EV's and race or
display what you've got we have plenty of room and
lots of juice.
--- Arak Leatham <[EMAIL PROTECTED]> wrote:
>
> Pretty safe bet! Talk IS cheep.
>
> Apply, the old addage "one in the hand is worth 2 in
> the bush." In this case it's worth 100 in the bush.
>
> Of course I should talk. I think my own design is
> such a great deal. And here I sit in this forum, in
> a virtual sea of designers and builders. Ya gotta
> know, just saying that you have magic will not
> impress a group of wizzards. And rightly so.
>
> BIG thinking is easy, BIG doing is hard.
>
> It's pretty cool though to knock elbows with all of
> you guys. If we could have a convention I'ld surely
> hope I have the time and money to go there. AND
> you-all dang well better bring pictures!
>
> If I win the lotto, I promise this, to look in the
> achives for the interesting projects and offer you
> free transportation to the first [EVDL] world
> convention. Has there ever been one yet?
>
> CRAP! that was a cheep promise! If I actual won I'ld
> finish 3 of my projects, then vacation for 90 days
> in europe, and only then remember my promises. Guess
> I'm human after all.
>
>
>
>
> Arak Leatham - Web and Desktop Systems Developer
>
>
>
>
> Estimating, Point of Sale, Tracking, Reporting
> Applications> Date: Wed, 31 Oct 2007 09:34:04 -0700>
> From: [EMAIL PROTECTED]> To: ev@lists.sjsu.edu>
> Subject: Re: [EVDL] Cheaper speed controllers and
> motors are needed for EV world. (Tommey Reed)> > Bet
> you $5 you won't> > >> > My GatorController will be
> less expensive then controllers today, up to> > 50%
> savings.> > I am still testing many design to give
> all the data needed for your basic> > controllers,
> with up to 144v 1000 amps of power.> > I am also
> design light weight ac/dc motors for the next
> generation motors,> > these? magnet motor would be
> much lighter the today design.> > Also I'm testing a
> new idea on a battery design that could be a big
> break> > though for longer power output for the next
> EV.> >> > Tom> >> >
>
________________________________________________________________________>
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> http://lists.sjsu.edu/mailman/listinfo/ev> >> > > --
> > If you send email to me, or the EVDL, that has > 4
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> specifically authorizing me to do whatever I> wish
> with the message. By posting the message you agree
> that your long> legalistic signature is void.> >
> _______________________________________________> For
> subscription options, see>
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------------------------------
Message: 4
Date: Wed, 31 Oct 2007 18:58:16 +0100
From: "Evan Tuer" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Tesla and Hyatt
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=UTF-8
On 10/30/07, Lee Hart <[EMAIL PROTECTED]> wrote:
[how great British plugs are]
> These, or something like them would be a wonderful improvement over the
> standard US plugs and receptacles. They are already mass produced, and
> so economical.
It's worth pointing out that even these are not very suited to EV
charging. Matt Trevaskis wrote a good paper explaining all the
reasons, but briefly;
- They don't like to be pulled out by the cable (if it gets tripped over)
- 13A only gives you 3kW, and to be honest they can get a bit warm if
you do that continuously.
- they are difficult to make splashproof
- Since they are ubiquitous there is the unwelcome possibility of
charging your EV on a PME domestic supply, which is not a good idea.
But mainly because there is already a much better standard available
in the form of http://en.wikipedia.org/wiki/IEC_309 connectors, so
everyone uses those.
------------------------------
Message: 5
Date: Wed, 31 Oct 2007 11:06:33 -0700 (PDT)
From: Jeff Major <[EMAIL PROTECTED]>
Subject: Re: [EVDL] * Discover agms ?
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Thanks, Roger,
Nice report. That's what I was looking for.
Jeff M
--- Roger Stockton <[EMAIL PROTECTED]> wrote:
> Seth Myers wrote:
>
> > Yesterday I went to the local batery distributor
> to pick up a
> > Trojan T105 or T125 [...] preached to me the
> virtues of
> > the Discover dry cell (agm).
> >
> > The chief virtues are the following:
> >
> > - no acid (esp since 10 will sitting in the
> interior
> > compartment (we'll have adequate
> bracing/protection);
> > - no hydrogen gasing
> > - no acid spray
> > - costs about 2x ($325 ish vs $170 ish) as much,
> but last 2 -
> > 2.5x as long
>
> I think you'll find that this is just the usual
> price differential between floodies and AGMs.
> Compare the cost of the Discovers to other AGMs of
> similar size and you'll likely find them to be quite
> competitive.
>
> > and they seem to have pretty decent performance
> > characteristics (124 minutes rc at 75 vs 115 for
> Trojans, I
> > think) so it just seems to be a matter of buying
> 4-6 yrs.
> > worth of batteries up front vs. 2-3. (??)
>
> I've cycled Discover's L16 and T105-size 6V AGMs and
> they will deliver their rated capacity at 75A.
>
> > I had initially shied away from Discover when
> I heard
> > they were essentially agm, meaning in my mind
> 200-300 cycles
> > before going kaput, but it looks like they are
> more like
> > 1000-1100 cycles at 50% dod (compare vs Trojan's
> specs of 438
> > cycles T105, 492 cycles for T125).
>
> They aren't essentially AGMs, they are exactly AGM.
>
> The Trojan numbers you refer to sound like their
> "lifetime eneregy unit" (LEU) ratings, not cycles.
> A 6V flooded battery is typically rated to about 700
> cycles @ 80%DOD, and this will increase dramatically
> at shallower DOD, just as it does for the AGMs.
>
> Without digging up the Discover specs to fins a
> cycle vs DOD plot, I would expect them to deliver
> about 300-400 cycles @ 80%DOD, or about 1/2 the
> cycles of the floodeds. Despite this, they *do*
> apparently last longer in certain applications than
> floodies simply because floodies often die well
> before their rated cycle life due to lack of
> maintenance and other operationsla abuses. If your
> floodies die in 12-18months and the Discovers (which
> require no maintenance) last 24-36months, then one
> can honestly state that the Discovers last 2x as
> long.
>
> > I recall Firefly said their lead acid battery
> > would end up being something like 5x in price a
> regualr lead
> > acid, so since this is just 2x, these seem like a
> midway step
> > in the firefly direction ...
>
> Not quite. To their credit, the Firefly folks
> compared their projected prices to those of present
> AGMs (not floodeds). That is, the Firefly is
> predicted to cost about 1.5-2x the cost of your
> Discover (or any other) AGMs, not 1.5-2x the cost of
> floodies.
>
> There is also nothing revolutionary about the
> Discovers; they are just a decent quality AGM.
>
> As to actual EV use, I'm not aware of anyone using
> the 6V modules. Randy at CEV has built a few Neons
> running packs of the Discover EV31A-As and has been
> quite pleased with the performance. I've got a 120V
> set of the Discover EV34A-As in my EV at the moment.
> It is too early for me to say anything about their
> cycle life, but my first impression is that the
> EV34A-As are not as stiff as the elderly Optima YTs
> they replaced. I would not recommend them to
> someone as a less costly power battery than Optimas,
> Orbitals, or Hawker/Odesseys.
>
> However, the EV34A-A is pretty much a drop-in
> replacement physically for the Optima Group 34 YT.
> The main difference is that the EV34 is a more
> conventional flat-plate construction, and has the
> threaded insert style terminals rather than the
> automotive SAE posts. The EV34s are 70Ah and 50lb
> vs the 50 (55Ah?), 43lb YT.
>
> If you are the sort who looks after your batteries,
> then it would be difficult to recommend any sealed
> battery over floodies in terms of cost. You will
> need a decent charger to hope to approach the rated
> cycle life for any type of battery. If you need to
> locate batteries in the passenger compartment or
> someplace where access for routine maintenance will
> be difficult, then sealed batteries may be
> appropriate. If you want a stiffer pack, then AGMs
> may be appropriate.
>
> Note that Discover makes sealed batteries in both
> gel and AGM types, and the gels tend to have longer
> rated cycle life than the AGMs. If your application
> will use discharge rates compatible with the gel
> ratings, you might be better off using them than the
> AGMs. This is especially true if you are
> considering large sealed 6Vers since even a very
> modest 2-3C rate is 450-700A for a 225Ah-ish module.
> If you decide to consider gels, you might want to
> comparison shop against the DEKA/East Penn and
> Sonnenschein 6V gels since these brands are
> typically associated with high-quality gels.
>
> Discover's site is at
> <http://www.discover-energy.com/>.
>
> Cheers,
>
> Roger.
>
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------------------------------
Message: 6
Date: Wed, 31 Oct 2007 11:23:49 -0700
From: "Adrian DeLeon" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Blowers (battery box fans)
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; delsp=yes;
charset=iso-8859-15
Storm Connors wrote:
>> Battery boxes should have exhaust fan, not pressurizing.
I'll second this. If your fan is on the intake side and pushes air through
the battery boxes, then ANY SMALL LEAK in those large boxes will push the
acid fumes into your car. Ask me how I know!
I used a marine bilge blower (inline, impeller type) for my fan and it
quit after about 1.5 years. Still haven't gotten around to replacing it.
Many people use PC cooling fans - you don't need to cool anything, just
keep the H2 from building up in great concentration. Make sure your exit
vent is near the top of the battery box...
While I notice acid smell when charging, I've never noticed it while
driving. Batteries shouldn't produce much H2 while discharging unless you
reverse a cell!
-Adrian
------------------------------
Message: 7
Date: Wed, 31 Oct 2007 11:26:29 -0700 (PDT)
From: wayne alexander <[EMAIL PROTECTED]>
Subject: [EVDL] RE cheap controllers
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Cheapest and most effective controller I have seen was a HUGE knife switch,
made of bar stock, weighed about 65 lbs, for a power plant station. LOLOL
that should put the cheap controller thing to rest wayne, ev-blue.com
------------------------------
Message: 8
Date: Wed, 31 Oct 2007 19:28:28 +0100
From: "Evan Tuer" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Tesla and Hyatt
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=UTF-8
On 10/31/07, Evan Tuer <[EMAIL PROTECTED]> wrote:
> But mainly because there is already a much better standard available
> in the form of http://en.wikipedia.org/wiki/IEC_309 connectors, so
> everyone uses those.
... And look at that, the Tesla's charge plug bears a remarkable
resemblance to those connectors, perhaps the 63A version:
http://www.teslamotors.com/images/content/charging.jpg
------------------------------
Message: 9
Date: Wed, 31 Oct 2007 11:19:07 -0500
From: "Mark McCurdy" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Brusa NLG5 Air Flow Direction?
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Typical small axial dc fans will be completely open on one side and the
struts holding the hub of the fan on the other side. The side with no struts
is the intake side of that fan.
If you can see the fan, you'll be able to determine which way the air blows.
I know this info is late, but better than never, hehe.
----- Original Message -----
From: "Tehben Dean" <[EMAIL PROTECTED]>
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Sent: Sunday, October 07, 2007 2:00 PM
Subject: Re: [EVDL] Brusa NLG5 Air Flow Direction?
> Wow, I have the same charger and the same question. I asked Victor
> only the other day but he didn't know right off.
>
> If I find out I will let you know :)
>
> Cheers,
> Tehben
>
>
> On 10/7/07, Mark Dutko <[EMAIL PROTECTED]> wrote:
>> Does anyone know the airflow direction on a side cooled Brusa NLG5
>> charger? Does the air flow in from the fan side and out the other or
>> does the air exit the fan side? There is nothing in the manual that
>> states this and I need to determine the proper clearances for air flow.
>>
>> Thanks,
>>
>> Mark
>>
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>
>
> --
> Tehben
> '90 Toyota 4x4 Pickup
> 'hElix EV'
> Website: www.helixev.com
> evalbum: http://www.austinev.org/evalbum/1225
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
------------------------------
Message: 10
Date: Wed, 31 Oct 2007 08:09:21 -0500
From: "Mark McCurdy" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] broken motor for sale
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Ahh, cool, glad it worked out.
----- Original Message -----
From: "JOHN P SWEENEY" <[EMAIL PROTECTED]>
To: "EV LIST" <[EMAIL PROTECTED]>
Sent: Wednesday, October 31, 2007 7:59 AM
Subject: [EVDL] broken motor for sale
>I bought the motor in question. It was repaired by Jim Husted (new end
>bell)
> it seems to work fine. The seller received it damaged & shipping insurance
> paid for the repair.
>
>
>
>
> Date: Tue, 30 Oct 2007 09:41:02 -0500
> From: "Mark McCurdy" <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
> Subject: [EVDL] Broken motor advertised as "New" on ev tradin post
> To: <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
> Message-ID:
> <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> http://www.austinev.org/evtradinpost/index.php?method=showdetails&list=advertisement&rollid=1895&fromfromlist=classifiedscategory&fromfrommethod=showhtmllist&fromfromid=29<http://www.austinev.org/evtradinpost/index.php?method=showdetails&list=advertisement&rollid=1895&fromfromlist=classifiedscategory&fromfrommethod=showhtmllist&fromfromid=29>
>
> New ADC 4002 Tropica Series-wound 20HP 72V
>
> Picture posted clearly shows the damage on the left, power stud and the
> part
> of the cap it's bolted to is smashed in. Can see where it's cracked away
> from the end cap.
>
> Just a head's up because the damage isn't obvious at first.
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
------------------------------
Message: 11
Date: Wed, 31 Oct 2007 11:40:47 -0700 (PDT)
From: wayne alexander <[EMAIL PROTECTED]>
Subject: [EVDL] smallest car
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
after watching that video of the worlds smallest car, i pushed my VW van back
in the garage. Iv had it for 2 years now and havent done anything with it,
150.00$ So I mesured out to cut the thing in 1/2 remove 4 foot section, the
slideing door area on both sides, pull it together weld it up and make it
electric, the mesurments make it about 8 foot long. paint it bright red, put
gren leaves on the roof and call it "the electric tomato"
I did a few of these vans when I had my shop in Fla, top heavy, but a ball
to drive
wayne ev-blue.com
------------------------------
Message: 12
Date: Wed, 31 Oct 2007 13:46:36 -0500
From: "Sarah & Erik" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EV Digest, Vol 3, Issue 85
To: ev@lists.sjsu.edu
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
Hi Chris,
For ventilating the battery boxes I'd think about it in terms number
of air exchanges per minute. My enclosed battery box (from the
Voltsrabbit kit) is about 3'x2' with about a 4" gap between the
batteries and lid. This is about 2 ft^3.
I think the fan I'm using is in the neighborhood of 10-15 cfm. That
makes for 5-7 air exchanges per minute, which seems entirely fine to
me.
As for pushing or pulling air, I also chose to push air into the box
for the same reason, but also because clearing out the H2 is one of
the main reasons to ventilate, and explosion proof fans are harder to
find. Honestly I was more worried about the acid mist eating the fan
though.
I have my fan hooked up to AC, from what I understand, if the
batteries are gassing when you're discharging, there are bigger
problems brewing since you've probably reversed a battery. I haven't
done it yet, but I bought a couple reed switches and intend to have
them control the AC to the fan. The reeds will be pulled in by the
current in the DC charging wire. This way, the fan only runs while the
battery is actually charging. I haven't put it in yet because I
haven't made sure that the switch will still be closed at 2-3 amps
during finish charging.
Erik
>
> Message: 17
> Date: Wed, 31 Oct 2007 10:46:04 -0500 (CDT)
> From: "Christopher Robison" <[EMAIL PROTECTED]>
> Subject: Re: [EVDL] Blowers
> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain;charset=iso-8859-1
>
> Thanks for your input Roland; I have a few questions/comments for you or
> anyone else:
>
> On Tue, October 30, 2007 7:25 pm, Roland Wiench wrote:
> > Hello Christopher,
> >
> > I am using total all plastic box fan from Rotron that is use for my
> > battery
> > box. It is duel voltage rating of 230 vac at 340 cfm at 3300 rpm, or you
> > can run it at half speed on 115 vac.
> >
> > source of supply is www.surplussales.com
>
> I'm looking for a continuing source of fans, instead of buying surplus.
> Apparently "Rotron" applies to two different companies; Comair-Rotron
> (http://www.comairrotron.com) who make one model of biscuit AC blower at
> only 22CFM, and Ametek-Rotron who make larger blowers, but only sell to
> military and aerospace (http://rotron.com).
>
> Is 340cfm really necessary? This has me concerned, as the crossflow fans
> I've chosen supply a maximum of 50cfm. Having to choose another fan at
> this point will complicate the design (should have asked earlier).
>
>
> >
> > I do not ventilate my battery box with the fan running.
>
> Do you mean, you don't ventilate the battery box with the "car" running?
>
> > outlet pipe pointing straight down with the 45 degree cut pointed to the
> > back. The inlet also has a 45 degree cut pointed to the front, so now we
> > have a ram air system when the vehicle is moving.
>
> This seems like a good idea. At any rate, it seems like you're
> recommending airflow through the battery box during discharge. Is the
> problem of outgassing just as high as when charging? Since the ducting
> will be difficult to fit in the current design, I may have to use a DC
> blower to provide airflow while driving.
>
> > I do use a larger Dayton Blower in my equipment enclosure to pressurize
> > it,
> > that contains a PFC-50 charger, contactors, fuses, and circuit breakers.
> > The blower is rated at 165 cfm at 115 volts. Uses a 6 inch carb type air
> > cleaner on it for the inlet air. I use that 3-M bulk air filters that
> > look
> > like scotch pads but is about 1 inch thick. I cut a piece of this in
> > stuff
> > it into the inlet air for the battery boxes.
>
> Early PFC chargers certainly needed very effective cooling; I'm hoping
> more recent ones deal with heat a bit better, here in Austin.
>
> --
> Christopher Robison
> [EMAIL PROTECTED]
> http://ohmbre.org <-- 1999 Isuzu Hombre + Z2K + Warp13!
>
>
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