X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 16 Oct 2007 15:05:32 -0400 Message-ID: X-Original-Return-Path: Received: from smtp119.sbc.mail.sp1.yahoo.com ([69.147.64.92] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with SMTP id 2390121 for lml@lancaironline.net; Tue, 16 Oct 2007 14:51:57 -0400 Received-SPF: none receiver=logan.com; client-ip=69.147.64.92; envelope-from=elippse@sbcglobal.net Received: (qmail 54245 invoked from network); 16 Oct 2007 18:50:15 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=MBSgmB/cXF5DrmUZX/SRBN6vbNgRlw+ou413S1meW4f+Di8UWAh81NU9eWoRqyFUoMn+Dk+VJQCzoXSmJtWZRlnPUQG34utRToLvXOZpQoOMo9phHnxHunVH6UD51Jujn7J8xQbYAKQuh7UYbm0jgsSXyHw6+R8v3T6TItykgDs= ; Received: from unknown (HELO Computerroom) (elippse@sbcglobal.net@75.15.125.216 with login) by smtp119.sbc.mail.sp1.yahoo.com with SMTP; 16 Oct 2007 18:50:15 -0000 X-YMail-OSG: nLHB8GwVM1kJJFijRvet6sjD6A7m2Mm7IHGzmjn8QO8O8T_wRVNVAdDme4ryaFQczm0CtZijvw-- X-Original-Message-ID: <000001c81025$636a62d0$d87d0f4b@Computerroom> From: "Paul Lipps" X-Original-To: "Marv Kaye" Subject: prop drag X-Original-Date: Mon, 15 Oct 2007 19:55:18 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C80F65.5029CF50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C80F65.5029CF50 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable The effective pitch of a fixed-pitch prop, in inches, is TAS, mph, times = 1056 divided by rpm. Use this at several speeds to get an idea of your = EP. Your prop, depending on its area, will be running a CL of about 0.3 = to 0.6. , or an AOA of about 3 deg. to 5 deg relative to the zero-lift = alpha. then from this, calculate the rpm you would need in a glide at = your best glide speed ------=_NextPart_000_0005_01C80F65.5029CF50 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
The effective pitch of a fixed-pitch prop, in = inches, is=20 TAS, mph, times 1056 divided by rpm. Use this at several speeds to = get an=20 idea of your EP. Your prop, depending on its area, will be running a CL = of about=20 0.3 to 0.6. , or an AOA of about 3 deg. to 5 deg relative to the = zero-lift=20 alpha.  then from this, calculate the rpm you would need in a glide = at your=20 best glide speed
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