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 5.2.14) with ESMTP id 3684217 for flyrotary@lancaironline.net; Tue, 16 Jun 2009 11:45:18 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090616154441.BYOP18948.fed1rmmtao107.cox.net@fed1rmimpo03.cox.net> for ; Tue, 16 Jun 2009 11:44:41 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo03.cox.net with bizsmtp id 4fkg1c00A3uzsQg04fkg7b; Tue, 16 Jun 2009 11:44:40 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=9TZckxVM-ygA:10 a=Pn2tUP1O9G1ETabply4A:9 a=i7Jkaoy3oco74B-oTF4YeLf2BU4A:4 a=Xi4P1pH0zeHRUazEvcAA:9 a=xqbyZiOQAJA87E6E2i0A:7 a=PbHYZeKghu5biqrWTiJY1gOa27AA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Not developing full power. Date: Tue, 16 Jun 2009 08:45:27 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C9EE5E.CC67C8E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 Importance: Normal Thread-Index: Acnuibrgw/Wt8GCASBatrxJ8pksqYAAFjA0g In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C9EE5E.CC67C8E0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Bill wrote; It strikes me that you should be able to get over 6K static (and take = off) RPM with the 2.17 drive.=20 =20 My static is around 5400 rpm max and there is still throttle left. I = am still working on my cooling, so I can not run the engine. But I don't = think I am developing enough power to try to fly. Actually, I think 5400-5500 rpm static is about right for a cruise pitch prop; especially with an engine that is not well run in. I had about = 5400 when I first started flying; now get about 5500. That gives me 5800 or = so on take off, and 6300-6400 WOT at cruise altitude and close to 200 KTAS. =20 Having some throttle travel left at max static is a function of TB size = and induction characteristics. On mine the last 25% of travel does little = for static run-up; makes more difference at altitude and higher rpm. =20 Al G (Velocity 20B) ------=_NextPart_000_0006_01C9EE5E.CC67C8E0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Bill wrote;

It strikes me that you should be able to get over 6K static (and = take off) RPM with the 2.17 drive. 

 

  My static is around 5400 rpm max and = there is still throttle left.  I am still working on my cooling, so I can = not run the engine.  But I don’t think I am developing enough power = to try to fly.

Actually, I think 5400-5500 rpm = static is about right for a cruise pitch prop; especially with an engine that = is not well run in.  I had about 5400 when I first started flying; now get = about 5500.  That gives me 5800 or so on take off, and 6300-6400 WOT at = cruise altitude and close to 200 KTAS.

 

Having some throttle travel left = at max static is a function of TB size and induction characteristics.  On = mine the last 25% of travel does little for static run-up; makes more = difference at altitude and higher rpm.

 

Al G (Velocity = 20B)

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