Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2584334 for flyrotary@lancaironline.net; Thu, 18 Sep 2003 11:15:55 -0400 Received: from rad ([68.212.12.251]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030918151550.FWCM13391.imf22aec.mail.bellsouth.net@rad> for ; Thu, 18 Sep 2003 11:15:50 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: turbo performance? Date: Thu, 18 Sep 2003 10:15:50 -0500 Message-ID: <002601c37df7$bea3dd30$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C37DCD.D5CDD530" 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 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C37DCD.D5CDD530 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hmmm. any idea on the firewall forward weight? Whats the standard stock engine for you're plane?=20 How much could you loose with a carbon fiber cowl?=20 =20 No idea about the current FWF weight, but the extra is primarily in the turbo, radiator, and XXL cowling. I know nothing about carbon fiber. = The RV-3 was designed for an O-290, but will also take an O-320. The O-320 folks are also at the forward CG, but that's with the battery forward of = the spar. I put mine in the very back of the baggage compartment, which is = the only thing that saved my CG. =20 =20 Right. My input says that an intercooler is essential. Perhaps you don't need it at altitude, but you do at sea level.=20 =20 Then the turbo has to go, simple as that :-) Seriously, it will all = depend on the intake air temp at the desired takeoff power level, which I have = no way of measuring at the moment. My initial thought was that I wouldn't = need boost at low altitude, but I'm finding that to be incorrect. =20 =20 Excuse me? I've always used regular in my Saab turbo. I think most NA 3B drivers run regular. Are you saying high test is essential for a turbo? = =20 I have no idea about Saabs, but I suspect that your ECU will detect = knock, and reduce timing as necessary. Look through your manual again, and I'd = bet that it says something about using premium for best performance. To my knowledge, NA 13B's do not need anything more than the cheapest gas you = can find. I don't know what Mazda recommends for an FC turbo, but I know = that premium is a requirement for the twin turbo FD. It's my understanding = that piston engines can generally tolerate far more detonation than rotary engines. =20 =20 > I ask myself every day why I'm worrying about 7 psi =20 What answer do you get from yourself?=20 =20 Because I don't want to break an apex seal just past the departure end = of the runway. =20 =20 Cheers, Rusty =20 =20 =20 ------=_NextPart_000_0027_01C37DCD.D5CDD530 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Hmmm.=20 any idea on the firewall forward weight? Whats the standard stock engine = for=20 you're plane?
How=20 much could you loose with a carbon fiber cowl? 
&nbs= p;
No idea about the = current FWF=20 weight, but the extra is primarily in the turbo, radiator,=20 and XXL cowling.  I know nothing about carbon = fiber. =20 The RV-3 was designed for an O-290, but will also take an = O-320.  The=20 O-320 folks are also at the forward CG, but that's with the battery = forward of=20 the spar.  I put mine in the very back of the baggage compartment, = which is=20 the only thing that saved my CG. =20  
 
Right.=20 My input says that an intercooler is essential. Perhaps you don't need = it at=20 altitude, but you do at sea level. 
&nbs= p;
Then the turbo has = to go,=20 simple as that  :-)  Seriously, it will all depend on the = intake air temp at the desired takeoff power level, which I have no = way of=20 measuring at the moment.  My initial thought was that I wouldn't = need boost=20 at low altitude, but I'm finding that to be incorrect. =20    
 
Excuse=20 me? I've always used regular in my Saab turbo. I think most NA 3B = drivers run=20 regular. Are you saying high test is essential for a turbo?  
&nbs= p;
I have no idea about = Saabs, but I=20 suspect that your ECU will detect knock, and reduce timing as = necessary. =20 Look through your manual again, and I'd bet that it says something about = using=20 premium for best performance.  To my knowledge, NA 13B's do not = need=20 anything more than the cheapest gas you can find.  I don't know = what Mazda=20 recommends for an FC turbo, but I know that premium is a requirement for = the twin turbo FD.   It's my understanding that = piston=20 engines can generally tolerate far more detonation than rotary=20 engines.   
 
> I ask myself every day = why=20 I'm worrying about 7 psi  
What=20 answer do you get from yourself? 
&nbs= p;
Because I don't want to = break an=20 apex seal just past the departure end of the=20 runway.  
&nbs= p;
Cheers,<= /DIV>
Rusty
 
 
 
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