Posted by daestrom on August 9, 2009, 3:03 pm
Archimedes' Lever wrote:
> wrote:
>
>> But you still have to spin it at a couple thousand RPM, so they are
>> pretty difficult to use with wind turbines (a point that troll keeps
>> missing).
>>
>> daestrom
>
> The old generators in cars required high rpms to function efficiently.
>
> Alternators were designed and incorporated into cars specifically
> because they do NOT require a high rpm to have efficient output, so you
> are wrong about the 2k rpm minimum.
>
As others have pointed out to you, you got it wrong.
In order to get a useful voltage out of an old DC generator, you had to
rev up the engine slightly. This was simply because they were belted to
run at a slower RPM. This was necessary because when the engine was
turning at 3k-4k, you couldn't have the generator spinning much faster
than 4k itself or it would disintegrate from the centrifugal forces.
(unless you want to spend the $ on a variable-ratio belt drive for just
the DC generator).
Alternators are connected to the engine with a belt drive that steps-up
the RPM so that when the engine is idling, the alternator is spinning
much faster. Thus, it is able to produce a usable voltage even with the
engine idling. The mechanical design of the alternator uses two strong
metal pieces with interlocking 'fingers' to hold the winding and can
withstand much higher speeds than a conventional DC generator rotor.
> Also, idiot, and wind turbine (ALL in fact) gear the blade speed up to
> drive the alternator at a higher rpm. It would be no problem to convert
> blade rotation into a higher rpm shaft drive.
Another gross generalization based on thin air.
daestrom
Posted by Rich Grise on August 10, 2009, 10:58 pm
On Mon, 10 Aug 2009 18:19:42 -0400, daestrom wrote:
> Archimedes' Lever wrote:
>>
>> If all you are going to do is make shit up, you should stay out of a
>> discussion where you tout yourself as knowing about it.
>
> Back at ya. Go look at the pulley ratio on an old engine (say '40s or
> '50s) with a DC generator, then go look at a modern auto. Until you've
> done that, just shut up and blow away...
>
The only way to get rid of trolls like that is to filter them.
Hope This Helps!
Rich
Posted by Richardson on August 14, 2009, 8:38 am
> On Mon, 10 Aug 2009 18:19:42 -0400, daestrom wrote:
>> Archimedes' Lever wrote:
>>>
>>> If all you are going to do is make shit up, you should stay out of a
>>> discussion where you tout yourself as knowing about it.
>>
>> Back at ya. Go look at the pulley ratio on an old engine (say '40s or
>> '50s) with a DC generator, then go look at a modern auto. Until you've
>> done that, just shut up and blow away...
>>
>
> The only way to get rid of trolls like that is to filter them.
>
> Hope This Helps!
> Rich
Heehee........every body said Archimedes' Lever is a troll.
The evidence is clear, he spent his time spreading his diarrhea around =
to burn off his excessive fat.
Posted by OutsideObserver on August 15, 2009, 4:10 am
wrote:
>You are nothing new, unique, interesting, worthwhile, or anything
>good;
Did I ever claim to be such? You are daft!
> nothing but a waste of time.
Yet you pay.
> Do Usenet a favor and
>self-destruct.
Folks like you that spew words like that are the ones that should
succumb to something... like a brain clot that disables you completely
and leaves you speechless so that you cannot tell anyone that you are in
extreme pain. Your family should be cursed with the pain of having to
feed and dress you, etc.
You're crawlin' and you shant get up... boy. (in so many ways)
Posted by Steve Ackman on August 15, 2009, 10:20 pm
20:44:19 -0700, JosephKK, quiettechblue@yahoo.com wrote:
> ...
> You are nothing new, unique, interesting, worthwhile, or anything
> good; nothing but a waste of time. Do Usenet a favor and
> self-destruct.
It's a simple matter.
%BOS
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>
>> But you still have to spin it at a couple thousand RPM, so they are
>> pretty difficult to use with wind turbines (a point that troll keeps
>> missing).
>>
>> daestrom
>
> The old generators in cars required high rpms to function efficiently.
>
> Alternators were designed and incorporated into cars specifically
> because they do NOT require a high rpm to have efficient output, so you
> are wrong about the 2k rpm minimum.
>