Hey Mike,
Would you mind filling in some gaps that I dont know
about on your build? I think I got something really
close to a "guess"timation.
gear ratio
rear tire size
new weight of bike
and your weight (if your dont want to tell me I gonna
say 215 :-P )
Sure thing...
Gear Ratio: 1:4.23529
Man, this parallels what I was thinking. Except I
wanted to show it in a graph. I will post as soon as
I get mike's info
Andrew Wowk wrote:
> Say you are pulling 200 amps with one etek running
> at any voltage:
>
> 200 * .033 ohms (terminal resistance) = 6.6v * 200 =
> 1320 watts in heat th
Hey Mike,
Would you mind filling in some gaps that I dont know
about on your build? I think I got something really
close to a "guess"timation.
gear ratio
rear tire size
new weight of bike
and your weight (if your dont want to tell me I gonna
say 215 :-P )
I was trying to figure this out for da
Jeff:
Baffles me, the idea to overlook cooling air in the design of the
motor...why not mae the housing of aluminum with cooling fins or just have
fins in the existing frame
The etek was probably extensively tested in its designed-for application. I
bet if you stayed within the manufacturer
I have a brushless Etek but I haven't spun it up yet. I am still a n00b
on these things but from the controller research I have done it seems to
But aren't we all? It's not like you see electric motorcycles
scooting all over the place.
Maybe I should rephrase... I haven'l blown up a motor o
Either will be dangerously hot. You were measuring the outside casting
though and the heat is generated in the coils which I expect got quite a
bit hotter at least for a short time.
So, anyone care to guestimate what temp one wants to keep a spinning
etek under? Like Chris says, the spinning
Mike wrote:
I have a brushless Etek but I haven't spun it up yet. I am still a n00b
on these things but from the controller research I have done it seems to
But aren't we all? It's not like you see electric motorcycles
scooting all over the place.
Maybe I should rephrase... I haven'l bl
I have a brushless Etek but I haven't spun it up yet. I am still a n00b
on these things but from the controller research I have done it seems to
But aren't we all? It's not like you see electric motorcycles
scooting all over the place.
--
The Electric Motorcycle Portal
http://www.electric
on.
Waiting on fans... man-o-man this is fun!!
Jeff
-Original Message-
>From: Johnathan Vail <[EMAIL PROTECTED]>
>Sent: Jul 18, 2007 10:26 AM
>To: ElectricMotorcycles
>Subject: Re: [ElectricMotorcycles] Throw another Etek on the barbie
>
>
>On Wed, July 1
On Wed, July 18, 2007 11:15 am, Chris Tromley wrote:
> I'm very heavily on Damon's side on this one. The Etek seems to be a
> wonderful device, but it is very intolerant of operation outside its
> design envelope. An EM leans on that envelope pretty hard.
>
> I wonder if the new brushless versi
On 7/17/07, damon henry <[EMAIL PROTECTED]> wrote:
I've got no ideas about your DC to DC, but this is why I always recommend
the 6.7 inch series wound motors over Eteks. It's not that they can't do
the job, but they are too easy to fry. Too many amps either undoes all the
solder or demagnatizes
On Wed, July 18, 2007 9:54 am, Mike wrote:
>>Did you mean 160F or C? I have read the latest temps after pushing
>>the PMG pretty heavily (200 down to
>
> Fahrenheit is what I'm pretty sure the thermo was set on but now
> you've got me wondering. Surely the solder that holds it all
> together can
Did you mean 160F or C? I have read the latest temps after pushing
the PMG pretty heavily (200 down to
Fahrenheit is what I'm pretty sure the thermo was set on but now
you've got me wondering. Surely the solder that holds it all
together can't melt at 160F?
100 amps for some 20 seconds o
ElectricMotorcycles
>Subject: Re: [ElectricMotorcycles] Throw another Etek on the barbie
>
>>Wow. Mike when you kill 'em, you kill 'em dead as a hammer.
>
>I remember my first year in college. I had an instructor who told
>me, "If it's worth doing, it's wo
l, and yes they are
efficient, but the lack of thermal mass is a big part of the reason why they
are easily destroyed.
damon
From: Mike <[EMAIL PROTECTED]>
Reply-To: ElectricMotorcycles
To: ElectricMotorcycles
Subject: [ElectricMotorcycles] Throw another Etek on the barbie
Date: Tue,
Wow. Mike when you kill 'em, you kill 'em dead as a hammer.
I remember my first year in college. I had an instructor who told
me, "If it's worth doing, it's worth doing right." He never did
anything half way. He's my hero to this day. Ha ha.
separately excited motor (no field to excite).
; <[EMAIL PROTECTED]>
To: "ElectricMotorcycles"
Sent: Tuesday, July 17, 2007 9:19 PM
Subject: [ElectricMotorcycles] Throw another Etek on the barbie
Stick a fork in it. I think it's done.
Stick a fork in it. I think it's done.
It was pretty spectacular and very, very smelly. I'd would have
thought they used blue smoke in it like other electrical stuff but it
was dark gray. How they get that much smoke into something so small
is beyond me.
Too many amps for too long is my in
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