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From: "Eric Ruttan" <ericruttan@chartermi.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-769939@logan.com>
Subject: Re: [FlyRotary] Re: EWP reasons
Date: Sat, 5 Mar 2005 08:04:22 -0500

There is a very significant alternate reason to consider a EWP (electric
water pump).

Engine cooling is required.  Flight critical redundant systems just make
sense for aircraft.  A EWP is the lightest cheapest, fully capable back up,
that has a further advantage of being powered an alternate way from an
Engine Driven Water Pump (EDWP).

It was success as a backup system that drove the idea of EDWP replacement.

Eric
(still looking for a flavorful hat)

----- Original Message ----- 
From: "Ernest Christley"
> Bulent Aliev wrote:
>
> > Most of the people are trying to find solutions to non-existent
problems.
>
> Power.  We pay good money all over the place the get a few extra horses,
> or a little less drag.  Real world dyno test are showing up to 9Hp gains
> with the EWP, with most of the gains at high RPM (where we're at).
>
> Weight.  We pay good money all over the place to loose a few ounces.
> The EWP will save POUNDS.
>
> Balance.  I consider lead in my tailpost a problem.
>
> Configuration.  The EDWP just doesn't fit well in a lot of cases.
>
> Reliability.  Belts are very reliable, IFF installed properly.  Very few
> of us have factory jigs to verify 100% accurate installation.  The EWP
> makes a backup pump easy.