X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 985200 for flyrotary@lancaironline.net; Sun, 05 Jun 2005 09:45:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from ibm68aec.bellsouth.net ([65.6.194.9]) by imf24aec.mail.bellsouth.net with ESMTP id <20050605134441.VPXT26489.imf24aec.mail.bellsouth.net@ibm68aec.bellsouth.net> for ; Sun, 5 Jun 2005 09:44:41 -0400 Received: from rd ([65.6.194.9]) by ibm68aec.bellsouth.net with ESMTP id <20050605134441.PBHO29052.ibm68aec.bellsouth.net@rd> for ; Sun, 5 Jun 2005 09:44:41 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] EWP's was Re: SuperCharged Rotary JetBoat Date: Sun, 5 Jun 2005 08:44:42 -0500 Message-ID: <000001c569d4$ba2705f0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C569AA.D150FDF0" 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_0001_01C569AA.D150FDF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable The problem with Craig Davis pumps is not capacity, but with sustained output. Don Dunbar and I, did some tests last year on the EWP. The output is OK, but there was a problem with reliability. The racers say that they change them out every 8-10 hours or so. Some pumps do not even make 4 hours! The electric motor burns out! =20 Hi Dave, =20 My Davies Craig EWP has run for more than 35 hours now, with no problems = at all. In my current installation, it's in series with the stock pump, = but I run it all the time. If I wasn't using the water pump housing for an alternator mount, temp sensors, etc, I would have ditched the mechanical pump on the last engine rework. The single rotor will have two Davies = Craig EWP's, and no mechanical. =20 Todd has two Davies Craig EWP's, and no mechanical. He did have an = initial QA problem with his first pump, but he was able to take it apart, and = clean it up, and it's still going strong today. His second pump never had any issues, and he's even got a Davies Craig boost pump now to use with his heater circuit in the frigid winters. I'm not sure how many hours he = has on all the pumps, but they've been there since day one, except the boost = pump which he recently added. =20 With the new RX8 engine and water pump in mind, it seems to me that RX8 technology has left this problem behind. BR, Dave McC How is the Renesis pump new technology?=20 Cheers, Rusty ------=_NextPart_000_0001_01C569AA.D150FDF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

  The problem  with Craig Davis pumps is not = capacity,=20 but with
sustained output.  Don Dunbar and I, did some tests = last year=20 on the
EWP. The output is OK, but there was a problem with = reliability.=20 The
racers say that they change them out every 8-10 hours or so. Some = pumps
do not even make 4 hours!  The electric  motor burns=20 out!

 
Hi=20 Dave,
 
My = Davies Craig EWP has=20 run for more than 35 hours now, with no problems at all.  In my = current=20 installation, it's in series with the stock pump, but I run it all the=20 time.  If I wasn't using the water pump housing for an alternator = mount,=20 temp sensors, etc, I would have ditched the mechanical pump on the last = engine=20 rework.  The single rotor will have two Davies Craig EWP's, and no=20 mechanical.
 
Todd has = two Davies=20 Craig EWP's, and no mechanical.  He did have an initial QA problem = with his=20 first pump, but he was able to take it apart, and clean it up, and = it's=20 still going strong today.  His second pump never had any issues, = and he's=20 even got a Davies Craig boost pump now to use with his heater = circuit in=20 the frigid winters.  I'm not sure how many hours he has on all = the=20 pumps, but they've been there since day one, except the boost pump which = he=20 recently added.    

With the new RX8 engine and water pump in mind, it seems to me that=20 RX8
technology has left this problem behind. BR, Dave McC

How is the Renesis pump = new=20 technology? 

Cheers,
Rusty
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