X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao03.cox.net ([68.230.241.36] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 937273 for flyrotary@lancaironline.net; Mon, 09 May 2005 11:26:51 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.36; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao03.cox.net (InterMail vM.6.01.04.00 201-2131-118-20041027) with ESMTP id <20050509152604.DHUR26972.fed1rmmtao03.cox.net@BigAl> for ; Mon, 9 May 2005 11:26:04 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] center rotor OFF Date: Mon, 9 May 2005 08:26:13 -0700 Message-ID: <000601c554ab$6f822c70$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01C55470.C3235470" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0007_01C55470.C3235470 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable =20 On a 3 rotor in economy cruise, would it be possible to completely shut = off the center rotor fuel injectors and just pump air? I am sure friction = losses would not be much, and fuel savings could be high. Many cars do this now = by shutting off the valves or some other method. Would the lack of a power pulse unbalance the engine?=20 =20 Definitely. Don't go there. The three rotors fire at equal intervals = so I expect it may not make any difference which of the three you shut down. Having run briefly with one rotor not firing (don't recall which one); = it's pretty rough. =20 Al =20 ------=_NextPart_000_0007_01C55470.C3235470 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

 

On a 3 rotor in economy cruise, would it be possible to completely shut off = the center rotor fuel injectors and just pump air? I am sure friction losses = would not be much, and fuel savings could be high. Many cars do this now by = shutting off the valves or some other method. Would the lack of a power pulse = unbalance the engine?

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Definitely.&nb= sp; Don’t go there.  The three rotors fire at equal intervals so I expect it = may not make any difference which of the three you shut down.  Having run = briefly with one rotor not firing (don’t recall which one); it’s pretty = rough.

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Al

 

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