jb
>
> I've been following the discussion over electro-magnetic clutched vs
> other fans. I'm using both at the moment. I have a pair of 14 inch
> electrics on my Chevy truck and the electro-clutch on my 82 505 TD. I
> think the electrics are far superior for 2 reasons not yet mentioned.
> Number one, they're independent of engine RPM, working far better than
> anything mechanical when you're stuck in slow or non-moving traffic. No
> mechanical fan is going to run max RPM when you're idling... the
> difference in my truck in traffic is astounding. Number two, electric
> fans are not coupled to the engine and so they don't have to accomodate
> engine movement; they are extremely closely shrouded making them much
> more efficient. My 505 TD has been modded for the lightweight fan, but
> still I have to allow the 1 inch gap around the fan blades for possible
> engine movement. If you ever run a smoke test thru the air stream when
> the fan is engaged you might be surprised at the wasted airflow and
> turbulence. I've seen it done on aircraft engines with "ducted" fans
> (shrouds) and the effect on airflow is nothing short of phenomenal!
>
> My money's on electrics and I'll do it to the 505 soon as I figure out
> what to do with the crazy mag clutch and bearing assy. I believe it
> would provide an opportunity to double-belt at least the alternator and
> water pump, providing badly needed redundancy in those areas. Shame on
> French engineering for putting the most important belts at the BACK of
> the belt cluster!! They'd never get away with that in aircraft.
>
> ______________________________________________________
J.Balamurugan Phone: +91 (431) 552281
Computer Support Group FAX: +91 (431) 552133
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