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Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP id 3230658 for flyrotary@lancaironline.net; Thu, 13 May 2004 10:59:18 -0400 Received: from rad ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040513145918.OOUP17707.imf24aec.mail.bellsouth.net@rad> for ; Thu, 13 May 2004 10:59:18 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: Stock pump and EWP in series Date: Thu, 13 May 2004 09:59:21 -0500 Message-ID: <007101c438fa$df7baba0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0072_01C438D0.F6A5A3A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0072_01C438D0.F6A5A3A0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Greetings, Seeing the EWP topic reminded me that I've never mentioned how my = current arrangement is working. For rev-2, I wanted to install two EWP's, but = just couldn't find room for a second one. I also needed the mechanical pump housing for alternator mounting. I ended up installing one EWP at the = inlet to the mechanical pump housing, so it's in series with the stock pump. =20 So far, it's all working great. I have run both pumps (my normal flight mode), as well as the stock pump without the EWP (ground only). So far though, I haven't tried the EWP without the stock pump. I'm sure this = isn't going to be a problem, but I've put it on my list of things to get = around to. I'll just pull off the alt belt the next time I do a ground run, = and make sure cooling is still OK. The other thing I haven't experimented = with is the effect on cooling between having the EWP on and off. That's on = the list as well. I've got too much water cooling in cruise, so maybe = turning off the EWP will help, though I would prefer to leave it on all the time = as a full time backup. =20 Cheers, Rusty (one of each) =20 ------=_NextPart_000_0072_01C438D0.F6A5A3A0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

Greetings,

Seeing the EWP topic = reminded me=20 that I've never mentioned how my current arrangement is = working. =20 For rev-2, I wanted to install two EWP's, but just couldn't find room = for a=20 second one. I also needed the mechanical pump housing for = alternator=20 mounting. I ended up installing one EWP at the inlet to the = mechanical=20 pump housing, so it's in series with the stock pump.

So far, it's all working great. I have run = both pumps=20 (my normal flight mode), as well as the stock pump without the EWP = (ground=20 only). So far though, I haven't tried the EWP without the = stock=20 pump. I'm sure this isn't going to be a problem, but I've put = it on=20 my list of things to get around to. I'll just pull off the alt = belt the=20 next time I do a ground run, and make sure cooling is still OK. = The other=20 thing I haven't experimented with is the effect on cooling between=20 having the EWP on and off. That's on the list as = well. =20 I've got too much water cooling in cruise, so maybe turning off the = EWP=20 will help, though I would prefer to leave it on all the time as a = full time=20 backup.

Cheers,

Rusty (one of=20 each)

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