----- Original Message -----
Sent: Tuesday, October 18, 2005 10:40
AM
Subject: [FlyRotary] Re: EWP Re:
flyrotary_Web_Archive Re: Banishment
( I admit I am NOT a fan of EWP quite yet...., however
stand to be corrected)
I think Rusty used one with success in hot weather. I'm also
waiting to see the EWP prove itself, but at least over here we're open to
the possibility.
The RV-3
has a Davies Craig EWP in series with the mechanical pump. The only
time I ever ran the EWP by itself, was during a ground test. I
was reluctant to fly it because I had to remove the alternator belt to
disable the mechanical pump. That also meant that the EWP only got 12V,
rather than the normal 13.8V or so that the alternator feeds it, which does
make a significant difference in the performance of the pump. Despite
that, it appeared to work just as well as the mechanical pump during a high
power ground run.
I had every
intention of running a pair (one and a backup) of EWP's on the single rotor
Slingshot, but there was no installation advantage to be gained in this
case. I had a brand new water pump housing assembly, and no conflicts
with space to install it. In fact, mounting the EWP's would have been
far more trouble than using the stock pump in this case. Now if I
put a single rotor in the Sonex... (not that I would of course, wink, wink,
nudge, nudge).
Cheers,
Rusty (single
rotor should be running in about a
month)
Hey, how am I doing with convincing?
:)