Message

Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3154762 for flyrotary@lancaironline.net; Fri, 09 Apr 2004 13:18:26 -0400 Received: from rad ([65.0.140.55]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040409171825.GBNF1832.imf22aec.mail.bellsouth.net@rad> for ; Fri, 9 Apr 2004 13:18:25 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Dave's pump problems and Rotor Poll Date: Fri, 9 Apr 2004 12:18:23 -0500 Message-ID: <043e01c41e56$ad076420$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_043F_01C41E2C.C4315C20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_043F_01C41E2C.C4315C20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable From the discussion so far, it sounds like I need some more continuous = flow through the vent system so I have attached a drawing of my proposed = changes, submitted for your [dis]approval.=20 =20 Hi Dave. The proposed scheme is much better. In fact, it's EXACTLY = what I had in rev-1 (big low mounted rad, same vent port, etc), and also the = way it's done in a 3rd gen car. Mazda refers to the pressurized can as an = AST (air separator tank). Mine flowed just dandy with and without a = thermostat. The only problem was that it was a pain to fill, since my pressure cap wasn't the high point. =20 =20 During my rev-2 upgrade, I simplified the system further, and got rid of = the AST. I was able to mount a pressurized cap at the high point where the water outlet is, and only have a plastic jug for overflow now. So far, this is working even better. =20 =20 =20 Lastly, I want to take a poll. I know there is no right answer so I am looking for everybody's opinion. While I have the engine apart I am considering replacing the 9.0:1 turbo rotors with the higher compression 9.7:1 n.a. rotors, even thought I still plan to run the turbo. =20 =20 I ran as much as 10 psi on mine, with 9.7 rotors, but I was using 100LL fuel, and had the timing retarded a bit. From everything I've heard, = you won't really be able to tell the diff between 9.0, and 9.7. That being said, when I upgraded my 8.5 rotors, I insisted on 9.7, rather than the = 9.4 rotors. The 8.5's are still in the attic. They only have Mazda's test = run time on them. I'll make you a good deal :-) =20 Cheers, Rusty (off to test a pitch setting that's probably too low) =20 =20 ------=_NextPart_000_043F_01C41E2C.C4315C20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

From the = discussion so=20 far, it sounds like I need some more continuous flow through the vent = system so=20 I have attached a drawing of my proposed changes, submitted for your=20 [dis]approval.

Hi Dave. = The proposed=20 scheme is much better. In fact, it's EXACTLY what I had = in rev-1=20 (big low mounted rad, same vent port, etc), and also the way=20 it's done in a 3rd gen car. Mazda refers to=20 the pressurized can as an AST (air separator tank). Mine = flowed=20 just dandy with and without a thermostat. The only problem was = that it was=20 a pain to fill, since my pressure cap wasn't the high=20 point.

During my = rev-2 upgrade, I=20 simplified the system further, and got rid of the AST. I was able = to mount=20 a pressurized cap at the high point where the water outlet is, = and=20 only have a plastic jug for overflow now. So far, this is working even better. =20

Lastly, I=20 want to take a poll. I know there is no right answer so I am = looking for=20 everybody’s opinion. While I have the engine apart I am = considering=20 replacing the 9.0:1 turbo rotors with the higher compression 9.7:1 n.a. = rotors,=20 even thought I still plan to run the turbo.

I ran as much = as 10 psi on=20 mine, with 9.7 rotors, but I was using 100LL fuel, and had the timing = retarded a=20 bit. From everything I've heard, you won't really be able to tell = the diff=20 between 9.0, and 9.7. That being said, when I upgraded my 8.5 = rotors, I=20 insisted on 9.7, rather than the 9.4 rotors. The 8.5's are still = in the=20 attic. They only have Mazda's test run time on them. I'll = make you a=20 good deal :-)

Cheers,

Rusty (off to = test a pitch=20 setting that's probably too low)

------=_NextPart_000_043F_01C41E2C.C4315C20--