X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3889186 for flyrotary@lancaironline.net; Sat, 17 Oct 2009 11:13:22 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20091017151246.SKKV21470.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Sat, 17 Oct 2009 11:12:46 -0400 Received: from BigAl ([72.192.133.78]) by fed1rmimpo01.cox.net with bizsmtp id trCl1c00G1hf1Cg03rClmD; Sat, 17 Oct 2009 11:12:45 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=XJEpyoSJvEmI45xKyeoA:9 a=tRtadqD4IFDGM7PKHxoJeB3vTRkA:4 a=I5bObN-y4KJdBeuTWBsA:9 a=1juTDTeIb3fmuX2B8SUA:7 a=0KTlV-zbGON2AoyGtkcFS2NuVf0A:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: Static rpm Date: Sat, 17 Oct 2009 08:13:24 -0800 Message-ID: <50C70F31F82840B985B7679EE3B94CE6@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01CA4F01.B2B37F30" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 Importance: Normal Thread-Index: AcpO6a2UGwPJvMvcQya3wGENo6m1AwAWV+Qg In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0016_01CA4F01.B2B37F30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Chris; =20 Only cuz it was mentioned....I usually do achieve about 6000 rpm static. = I am using a 2nd gen turbo block with a medium street port. I am guessin' = the street port brings my static up a bit. This is with a 2.17 B drive from Tracy and an Ivo in flight adjustable prop set at a fine pitch. When I = go course, it drops about 200 rpm. At some point you'll want to consider a larger prop or more pitch. Typically your static rpm with cruise pitch should be in the = neighborhood of 2450-2550 (so 5300 - 5500 on the engine). As it is ,you'll find you = can't go WOT in flight without over-speeding your prop. Are you sure the IVO is = going to full pitch? =20 I get about 5400 static, and can reach about 6300-6350 in flight. = That's a bit over 2900 on the Catto prop, which is speced for 3000 max. I'd = guess the max on the IVO should be a bit less. =20 Anyway, you must be generating serious power. What are the specs on = your prop? =20 Al G ------=_NextPart_000_0016_01CA4F01.B2B37F30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Chris;

Only cuz it was mentioned....I usually do achieve about 6000 rpm = static. I am using a 2nd gen turbo block with a medium street port. I am = guessin' the street port brings my static up a bit. This is with a 2.17 B drive = from Tracy and an Ivo in flight adjustable prop set at a fine = pitch. When I go course, it drops about 200 rpm.

At some point you’ll want = to consider a larger prop or more pitch. Typically your static rpm = with cruise pitch should be in the neighborhood of 2450-2550 (so 5300 – = 5500 on the engine). As it is ,you’ll find you can’t go WOT in = flight without over-speeding your prop. Are you sure the IVO is going to full = pitch?

I get about 5400 static, and can = reach about 6300-6350 in flight. That’s a bit over 2900 on the = Catto prop, which is speced for 3000 max. I’d guess the max on the IVO = should be a bit less.

Anyway, you must be generating = serious power. What are the specs on your prop?

Al G

------=_NextPart_000_0016_01CA4F01.B2B37F30--