X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.80] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 180176 for flyrotary@lancaironline.net; Tue, 19 Jul 2005 08:11:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.80; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 19 Jul 2005 05:10:44 -0700 Message-ID: Received: from 64.4.51.220 by BAY107-DAV8.phx.gbl with DAV; Tue, 19 Jul 2005 12:10:44 +0000 X-Originating-IP: [64.4.51.220] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Surge, wastegate, Evans, and Anesthesia Date: Tue, 19 Jul 2005 08:10:41 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01C58C39.5AB5B710" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Tue, 19 Jul 2005 08:10:41 -0400 X-OriginalArrivalTime: 19 Jul 2005 12:10:44.0857 (UTC) FILETIME=[E3E8FE90:01C58C5A] This is a multi-part message in MIME format. ------=_NextPart_000_0045_01C58C39.5AB5B710 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Way to go Dave, that's the way progress is made on this stuff. Still = can't believe you got this far on the plane during your residency! Tracy (expecting coils today, hoping to test top secret speed mod on = RV-4) ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 19, 2005 1:36 AM Subject: [FlyRotary] Surge, wastegate, Evans, and Anesthesia In my last episode, I was battling compressor surge (stall) and going = to try to put a hole in the intake system to create more flow. The = thought was that would allow me to open up the throttle more, decrease = the apparent pressure ratio to the turbo (because of reduced throttle = body losses) and allow for more flow. No good... I made a hole working = up to 1/2 inch in dia which created a noticeable difference in throttle = position for a given boost but no improvement in the occurrence of = surge.=20 Well, I finally graduated my residency last week and now will be = working much less, including 3 weeks of vacation. The first of which I = spent at the hangar. I decided to just open up the wastegate.. I = removed the flapper valve all together, opening up the waste gate = significantly. I was worried that it might be too much and I would not = be getting any boost. But with the flapper removed I still can make = 40"MAP on take off, my RPM for a given MAP is improved (probably because = of decreased back pressure) and thermal rejection may be improved as = well. All in all it was a good move because my limiting factor is still = cooling.=20 More stats later as I am flying to the mountains tomorrow... The wife = is even going to come along. --=20 Dave Leonard Turbo Rotary RV-6 N4VY = http://members.aol.com/_ht_a/rotaryroster/index.html = http://members.aol.com/vp4skydoc/index.html ------=_NextPart_000_0045_01C58C39.5AB5B710 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Way to go Dave, that's the way progress is made on this = stuff.  =20 Still can't believe you got this far on the plane during your=20 residency!
 
Tracy  (expecting coils today, hoping to test top secret speed = mod on=20 RV-4)
----- Original Message -----
To: Rotary motors in = aircraft
Sent: Tuesday, July 19, 2005 = 1:36=20 AM
Subject: [FlyRotary] Surge, = wastegate,=20 Evans, and Anesthesia

In my last episode, I was battling compressor surge (stall) and = going to=20 try to put a hole in the intake system to create more = flow.   The=20 thought was that would allow me to open up the throttle more, decrease = the=20 apparent pressure ratio to the turbo (because of reduced throttle body = losses)=20 and allow for more flow.  No good...  I made a hole working = up to=20 1/2 inch in dia which created a noticeable difference in throttle = position for=20 a given boost but no improvement in the occurrence of surge.
 
Well, I finally graduated my residency last week and now will be = working=20 much less, including 3 weeks of vacation.  The first of which I = spent at=20 the hangar.  I decided to just open up the wastegate..  I = removed=20 the flapper valve all together, opening up the waste gate = significantly. =20 I was worried that it might be too much and I would not be getting any = boost.  But with the flapper removed I still can make 40"MAP on = take off,=20 my RPM for a given MAP is improved (probably because of decreased back = pressure) and thermal rejection may be improved as well.  All in = all it=20 was a good move because my limiting factor is still cooling.
 
More stats later as I am flying to the mountains = tomorrow...  The=20 wife is even going to come along.
--
Dave Leonard
Turbo = Rotary RV-6=20 N4VY
http://memb= ers.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.c= om/vp4skydoc/index.html=20
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