----- Original Message -----
Sent: Sunday, November 07, 2004 12:05
AM
Subject: [FlyRotary] Re: EWP
maybe I missed it, but for what reason would
you want to run electric waterpumps?
- no
cavitation at high rpm
- better
cooling at low rpm (holding for takeoff, etc)
- more
power available for the prop, particularly at higher rpm's (remains to
be proven how much more)
- reliability (broken and throw belts are the only thing
that's EVER stranded me in a car, happened
twice)
-
easier, more flexible installation
-
redundancy (ever seen two mechanical pumps)
- other
advantages I'm too tired to think of at the moment.
For the
record, I'm pretty happy with my series mechanical and
EWP setup. It's sort of like having the best of both worlds.
The only reason I'll go full EWP is if I can prove that there's significant
performance to be gained. Frankly, I'll be surprised if I can tell
any RPM difference between mechanical, and EWP
runs.
Cheers,
Rusty
Rusty I don't see, how more
cooling flow at low rpm will cool better, there is still no change in
radiator-size/airflow/etc.
no cavitation at high rpm:
use underdrive pulleys
and maintain the belts in
correct alignmentand tension and you will never loose
one..........:)
Thomas
Jakits
(I have abour 5000 hrs flying
time in front of belts double-v-typ as the only means of powertransfer from
the engine to the rotor....)