X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 5.0c5) with ESMTP id 772178 for flyrotary@lancaironline.net; Tue, 18 Oct 2005 11:41:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from ibm67aec.bellsouth.net ([65.6.194.9]) by imf22aec.mail.bellsouth.net with ESMTP id <20051018154049.RWEJ28829.imf22aec.mail.bellsouth.net@ibm67aec.bellsouth.net> for ; Tue, 18 Oct 2005 11:40:49 -0400 Received: from rd ([65.6.194.9]) by ibm67aec.bellsouth.net with ESMTP id <20051018154034.QODV1915.ibm67aec.bellsouth.net@rd> for ; Tue, 18 Oct 2005 11:40:34 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] EWP Re: flyrotary_Web_Archive Re: Banishment Date: Tue, 18 Oct 2005 10:40:34 -0500 Message-ID: <022201c5d3fa$477e6e40$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0223_01C5D3D0.5EA86640" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0223_01C5D3D0.5EA86640 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable ( I admit I am NOT a fan of EWP quite yet...., however stand to be corrected)=20 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.=20 =20 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. =20 =20 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). =20 Cheers, Rusty (single rotor should be running in about a month)=20 =20 =20 ------=_NextPart_000_0223_01C5D3D0.5EA86640 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
( I admit I am NOT a fan of EWP quite yet...., = however=20 stand to be corrected) 
I think Rusty used one with success in hot weather. I'm = also waiting=20 to see the EWP prove itself, but at least over here we're open to = the=20 possibility. 
 
The RV-3=20 has a Davies Craig EWP in series with the mechanical pump.  = The only=20 time I ever ran the EWP by itself, was during a ground test.  I=20 was reluctant to fly it because I had to remove the alternator belt = to=20 disable the mechanical pump.  That also meant that the EWP only got = 12V,=20 rather than the normal 13.8V or so that the alternator feeds it, which = does make=20 a significant difference in the performance of the pump.  Despite = that, it=20 appeared to work just as well as the mechanical pump during a high power = ground=20 run.  
 
I had every = intention of=20 running a pair (one and a backup) of EWP's on the single rotor = Slingshot, but=20 there was no installation advantage to be gained in this case.  I = had a=20 brand new water pump housing assembly, and no conflicts with space to = install=20 it.  In fact, mounting the EWP's would have been far more trouble = than=20 using the stock pump in this case.  Now if I put a single = rotor in the=20 Sonex... (not that I would of course, wink, wink, nudge,=20 nudge).
 
Cheers,
Rusty (single = rotor should=20 be running in about a month) 
 
 
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