X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail1.fdic.gov ([167.176.16.5] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTPS id 3841177 for flyrotary@lancaironline.net; Tue, 08 Sep 2009 12:15:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=167.176.16.5; envelope-from=brogers@fdic.gov X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CA309F.73A66B20" Subject: RE: [FlyRotary] Regarding Scott Emery's turbo manifold Date: Tue, 8 Sep 2009 11:14:32 -0500 Message-ID: <1F44A251F397E444B05E240B8688AB790408FC80@DALEXC100P.PROD.FDIC.GOV> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Regarding Scott Emery's turbo manifold Thread-Index: AcovV4CZ0WCzFAdbQpaORcDRRtRpGQBRrGSg References: From: "Rogers, Bob J." To: "Rotary motors in aircraft" Return-Path: BRogers@FDIC.gov X-OriginalArrivalTime: 08 Sep 2009 16:14:34.0614 (UTC) FILETIME=[7482C160:01CA309F] This is a multi-part message in MIME format. ------_=_NextPart_001_01CA309F.73A66B20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I recommend that you get the book Maximum Boost by Corky Bell if you want to know all about turbochargers, including wastegates. =20 See http://search.barnesandnoble.com/Maximum-Boost/Corky-Bell/e/978083760160 1 =20 You really need a wastegate and it is external to the TO4. The wastegate should be mounted in the exhaust manifold before the flow gets to the turbo. It controls the exhaust pressure and, when necessary, allows exhaust to bypass the turbo to control the amount of boost. The pop-off valve is on the intake side and serves primarily to protect from over pressuring the system when you rapidly close the throttle. This should not happen in an airplane, but it does not hurt to have one (other than extra cost and slight extra weight). =20 Bob ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber Sent: Sunday, September 06, 2009 8:06 PM To: Rotary motors in aircraft Subject: [FlyRotary] Regarding Scott Emery's turbo manifold =20 Scott/Group, =20 I was just looking at the turbo set up that you posted. http://gallery.eaa326.org/members/semery/?g2_page=3D1 Thanks for = posting. =20 It looks great. It is continuing my motivation to pursue the turbo. I also have the Conversions Concepts mount. I too will likely have to fabricate - read that as have fabricated since, contrary to my manly man status :-), I know not how to weld :-( - my turbo manifold. I like how clean and simple yours is. =20 I am trying to decide the best position for it. The current extension that I have on my engine - in order to clear the Mistral Injectors location puts my aftermarket turbo manifold perilously close to my aileron control linkage (about 3/4 of an inch, or so). Also, it is right up on the top of the cowling. =20 My question to you is, I did not notice a waste gate mounting place on your turbo exhaust manifold. Both my aftermarket manifolds have a place to mount a waste gate. Did I miss it, is the wastage internal to the turbo? which I think is how Mazda did it, but figured this was not the case with the larger T04's we seem to be using). Where might I add one to a manifold I would have made. Would the position be secondary to just putting it in the place with most clearance? =20 While I have learned a great deal about how turbo's work, I am far from versed enough yet. Is there a conventional wisdom as to when to use a waste gate. I thought they were standard and the primary means to control boost, along with a pop off valve (if that is the correct term and idea?) =20 Advice and insight is sought and appreciated. =20 Thanks in advance guys and gals. =20 All the best, =20 Chris =20 Cpl. Christopher Barber, JD Badge 330 Bellaire Police Department 5110 Jessamine Bellaire, Texas 77401 =20 713-668-0487 713-662-8289 fax =20 CBarber@BellairePolice.com Warning: This e-mail transmission, and any documents, files or previous e-mails attached to it, may contain confidential information that is legally privileged. If you are not the intended recipient or the person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, please immediately notify us by telephone at 713-662-8132 and destroy the original transmission and its attachments without reading them. Thank you. ------_=_NextPart_001_01CA309F.73A66B20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I recommend that you get the book = Maximum Boost by Corky Bell if you want to know all about turbochargers, = including wastegates.  =

See http://search.barnesandnoble.com/Maximum-Boost/Corky-Bell/e/978= 0837601601

 

You really need a wastegate and it = is external to the TO4. The wastegate should be mounted in the exhaust = manifold before the flow gets to the turbo.  It controls the exhaust pressure and, when necessary, allows = exhaust to bypass the turbo to control the amount of boost. The pop-off valve is on = the intake side and serves primarily to protect from over pressuring the = system when you rapidly close the throttle.  This should not happen in an airplane, but it does not hurt to = have one (other than extra cost and slight extra = weight).

 

Bob

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris Barber
Sent: Sunday, September = 06, 2009 8:06 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Regarding Scott Emery's turbo manifold

 

Scott/Group,

 

I was just looking at the turbo set up that you posted.  http://gal= lery.eaa326.org/members/semery/?g2_page=3D1  Thanks for posting.

 

It looks great.  It is continuing my motivation = to pursue the turbo. I also have the Conversions Concepts mount. =  I too will likely have to fabricate - read that as have fabricated since, contrary to my manly man status :-), I know not how to weld = :-(   - my turbo manifold.  I like how clean and simple yours = is.

 

I am trying to decide the best position for it.  = The current extension that I have on my engine - in order to clear the = Mistral Injectors location puts my aftermarket turbo manifold perilously close = to my aileron control linkage (about 3/4 of an inch, or so).  Also, it is = right up on the top of the cowling.

 

My question to you is, I did not notice a waste gate mounting place on your turbo exhaust manifold.  Both my = aftermarket manifolds have a place to mount a waste gate.  Did I miss it, is = the wastage internal to the turbo? which I think is how Mazda did it, but = figured this was not the case with the larger T04's we seem to be using).  = Where might I add one to a manifold I would have made.  Would the = position be secondary to just putting it in the place with most = clearance?

 

While I have learned a great deal about how turbo's = work, I am far from versed enough yet.  Is there a conventional wisdom as = to when to use a waste gate.  I thought they were standard and the primary = means to control boost, along with a pop off valve (if that is the correct = term and idea?)

 

Advice and insight is sought and = appreciated.

 

Thanks in advance guys and = gals.

 

All the best,

 

Chris

 

Cpl. Christopher Barber, = JD

Badge 330

Bellaire Police = Department

5110 Jessamine

Bellaire, Texas 77401

 

713-668-0487

713-662-8289 fax

 

CBarber@BellairePolice.com


Warning: This e-mail transmission, and any documents, files or previous = e-mails attached to it, may contain confidential information that is legally privileged. If you are not the intended recipient or the person = responsible for delivering it to the intended recipient, you are hereby notified that = any disclosure, copying, distribution or use of any of the information = contained in or attached to this transmission is STRICTLY PROHIBITED. If you have = received this transmission in error, please immediately notify us by telephone at 713-662-8132 and destroy the original transmission and its attachments = without reading them. Thank you.

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