X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao106.cox.net ([68.230.241.40] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3185000 for flyrotary@lancaironline.net; Wed, 24 Sep 2008 09:37:59 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.40; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao106.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080924133721.UISO8615.fed1rmmtao106.cox.net@fed1rmimpo02.cox.net> for ; Wed, 24 Sep 2008 09:37:21 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo02.cox.net with bizsmtp id JddM1a00D1cVYgg04ddMGZ; Wed, 24 Sep 2008 09:37:21 -0400 X-Authority-Analysis: v=1.0 c=1 a=wQXZq7AGwhSEiYWIX3AA:9 a=7JgiVY9KTIqO0had-dRIQOyDFLwA:4 a=gJcimI5xSWUA:10 a=WsDM82Pe4X0pDyQBqdEA:9 a=BsEqerrQj2Ue8BwNV9UA:7 a=ptRjiC95Wg_OhAtHcR61zVKU4ZYA:4 a=AfD3MYMu9mQA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Vacuum Pulses Date: Wed, 24 Sep 2008 06:38:04 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0002_01C91E10.1966D750" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0002_01C91E10.1966D750 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 I am new at this engine running thing, having just done the third = start/run . I have some instrumentation, and am enclosing a plot of Manifold = pressure and Fuel pressure vs. time for the latest run. After letting it warm up = at ~14 in MP , I started increasing the power, and you can see that the = fuel pressure increases with the MP. Made one brief excursion to ~5900 rpm, swinging a 76x76 prop. All tests so far are with the cowl off, but the ducts are in place. =20 Bill; =20 Lookin' good. It does seem that the fuel pressure is running a bit low, = but I guess it depends on your injectors. Most are rated at a pressure of = 40 -43 psi., so when your MAP is 30, the fuel pressure is about 40 psi. I = set my pressure a t 40 with engine off; and it then comes down into the low = 30's when at idle. =20 Al G ------=_NextPart_000_0002_01C91E10.1966D750 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I am new at this engine = running thing, having just done the third start/run . I have some = instrumentation, and am enclosing a plot of Manifold pressure and Fuel pressure vs. time for = the latest run. After letting it warm up at ~14 in MP , I started increasing = the power, and you can see that the fuel pressure increases with the = MP. Made one brief excursion to ~5900 rpm, swinging a 76x76 = prop.

All tests so far are with = the cowl off, but the ducts are in place.

=

Bill;

Lookin’ good. It does = seem that the fuel pressure is running a bit low, but I guess it depends on = your injectors. Most are rated at a pressure of 40 -43 psi., so when = your MAP is 30, the fuel pressure is about 40 psi. I set my pressure a t 40 = with engine off; and it then comes down into the low 30’s when at = idle.

Al G

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