Derek & Joe,
I think you might be overlooking the most important aspect
of this sort of idea - the airflow that the fans produce. I
suspect that you would find the 14in (or whatever size the
automotive fans are) have a much larger capacity to push/
pull air around than 12 of the little fans.
For example in my RS Components catalogue, one of the highest
rated fans (computer power supply size) outputs 150 litres/sec,
however the current it draws at 12V is 1.2A (approx 15 watts
in power). I think you would find that the 100mA fans supplies
considerably less air flow than that fan simply because
of its lower power consumption. Unfortunately, not all the
fans in the catalogue have all of the specs - some have
current ratings, others have air flow ratings, while the
rarest have both, so I can't give you an example.
One other problem with the high output fan listed above
is that it costs AUS$113.56 for 1-4, or AUS$102.21 for
5-9 of them. Obviously you get what you pay for... That
would probably blow (no pun intended) your cooling budget.
Hope this helps,
Frank Biedermann
69 TR6 PI
Adelaide
AUSTRALIA
> -----Original Message-----
> From: Joe Curry [mailto:spitlist@gte.net]
> Sent: Wednesday, 9 August 2000 16:54
> To: derek evans
> Cc: triumphs@autox.team.net
> Subject: Re: Brainstorming: Fans
>
>
>
> Derek,
> You neglected to mention that they also run on 12 VDC. THat
> means there would not require any power conversion. However,
> I think that
> unless they were all running at the same time, you would
> actually be restricting air movement by all the plastic in
> front of (or
> behind) the radiator. Check out the dual fans on my race
> Spit
> http://www.driveableclassics.com/images/curry/engine1.jpg. I
> installed
> them for about $120 (US) and although they draw about 15 amps
> together, they work quite well.
>
> Regards,
> Joe
>
>
> derek evans wrote:
> >
> > hi all,
> >
> > been some talk of electric fans so i thought i'd throw up an idea.
> >
> > computer power supply fans cost about $10 ( in Australia)
> pull about 100mA
> > (.1A) and are quite reliable.
> > if you bolted 12 of them in front of the radiator (3X4)
> you would get a
> > hell of a breeze and pull only 1.2A (1A2)
> > you would get some inbuilt redundancy and you could bring them in
> > progressively.
> >
> > is this completely silly or do listers think there is some
> merit in this
> > idea?
> >
> > this occurs to me as i spend a lot of time listening to the
> damn things.
> >
> > cheers
> >
> > derek (and his fan club)
> >
> > _________________________________________________________
>
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