In article
,
Tim+ wrote:
wrote:
On Wednesday, 26 February 2020 11:12:20 UTC, Dave Plowman (News) wrote:
In article
,
Tim+ wrote:
Cars haven# had fan belts for years. Fans are all electric these days.

********.

AFAIK those aren't normally electric.


So what kind of pixies drive your cooling fans? If you car is younger
than about 20 years old, they‘ll be electric pixies.

Not so. Many much later than that used a temperature controlled viscous
coupling to drive an ordinary fan. Which just idles round when not needed.

To provide the same degree of cooling, you'd need an extremely powerful
electric one.

When a car is moving, the airflow through the rad means a decent viscous
coupling is going to waste a tiny amount of power, unless needed to cool
things. And when needed (like say when stopped or moving slowly, is an
electric one going to be any more efficient? After all the same belt
drives the alternator which feeds the electric motor.

Many of these setups will also have a supplementary electric fan, for the
AC, at high demand times.

--
*Gargling is a good way to see if your throat leaks.

Dave Plowman London SW
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