Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2578206 for flyrotary@lancaironline.net; Sat, 13 Sep 2003 11:44:24 -0400 Received: from rad ([68.212.12.251]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030913154423.ZBLK1843.imf25aec.mail.bellsouth.net@rad> for ; Sat, 13 Sep 2003 11:44:23 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: turbo wastegate requirements Date: Sat, 13 Sep 2003 10:44:24 -0500 Message-ID: <016501c37a0d$e88946a0$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0166_01C379E3.FFB33EA0" 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_0166_01C379E3.FFB33EA0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable No one seems to discussed the stock waste-gate controller. This is what = I plan to use. Should be more hands off and still produce good boost with some safety against boost creep. I also have a greddy pop-off valve but haven't decided if it is needed. I may not install it.=20 =20 Todd just provided an excellent drawing of the system he's using, which includes the stock wastegate actuator. I may try the same setup that he has, but I will need an actuator with a spring that's closer to 3 psi = than about 6 psi. I'm sure I can modify one, but I want to use the manual = lever long enough to prove what the wastegate can do. I also want to prove = how difficult it is to maintain a particular boost level with the manual = lever. I suspect that it's going to be a full time job, which would be better = left to a normal actuator. If it turns out to be simple, then why mess with = an actuator at all. Lot's of testing to do. =20 I have the 9.0 rotors and a well-fed intercooler so I plan to run a = little higher boost if I want to. I also have an IFR panel so I could climb = above 18k every once and a while. Would I need to? - almost never. But no = one has mentioned one of the big pluses of the turbo. bragging rights :-) = What would 36 in. MAP at 21K get us in terms of TAS? Of course - 30 min of endurance is not that great but you only need to gather the numbers once = to enjoy bragging rights for a lifetime :-) =20 =20 9.0 rotors are standard in the 3rd gen engine, and mine is happily = running 13 psi at sea level. Many run more than that, so you should be good to = go. I would still like to get other opinions of what I could run with 9.7 rotors. Lynn, any idea? John, thanks for asking your engine guy. =20 Rusty ------=_NextPart_000_0166_01C379E3.FFB33EA0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
No one seems to = discussed the=20 stock waste-gate controller.  This is what I plan to use.  = Should be=20 more hands off and still produce good boost with some safety against = boost=20 creep.  I also have a greddy pop-off valve but haven’t = decided if it is=20 needed.  I may not install it. 
 
Todd = just provided=20 an excellent drawing of the system he's using, which includes the=20 stock wastegate actuator.  I may try the same setup that he = has,=20 but I will need an actuator with a spring that's closer to 3 psi = than about=20 6 psi.  I'm sure I can modify one,  but I want to use the = manual lever=20 long enough to prove what the wastegate can do.  I also want = to=20 prove how difficult it is to maintain a particular boost level = with=20 the manual lever.  I suspect that it's going to be a full time = job,=20 which would be better left to a normal actuator.  If it turns = out to=20 be simple, then why mess with an actuator at all.  Lot's of testing = to=20 do.
 
I have the 9.0 rotors and a = well-fed=20 intercooler so I plan to run a little higher boost if I want to.  I = also=20 have an IFR panel so I could climb above 18k every once and a = while.  Would=20 I need to?  – almost never.  But no one has mentioned = one of the big=20 pluses of the turbo… bragging rights  J  What would 36 in. MAP at = 21K get us=20 in terms of TAS?  Of course – 30 min of endurance is not that = great but you=20 only need to gather the numbers once to enjoy bragging rights for a = lifetime=20 J   
 
9.0 rotors = are standard=20 in the 3rd gen engine, and mine is happily running 13 psi at sea = level. =20 Many run more than that, so you should be good to go.  I would = still=20 like to get other opinions of what I could run with 9.7 = rotors. =20 Lynn, any idea?  John, thanks for asking your=20 engine guy.
 
Rusty
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