X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 29 Jun 2014 09:01:58 -0400 Message-ID: X-Original-Return-Path: Received: from mail-pd0-f169.google.com ([209.85.192.169] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6956196 for lml@lancaironline.net; Sun, 29 Jun 2014 08:40:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.169; envelope-from=frederickemoreno@gmail.com Received: by mail-pd0-f169.google.com with SMTP id g10so6734558pdj.14 for ; Sun, 29 Jun 2014 05:40:16 -0700 (PDT) X-Received: by 10.66.254.68 with SMTP id ag4mr45169052pad.83.1404045616205; Sun, 29 Jun 2014 05:40:16 -0700 (PDT) X-Original-Return-Path: Received: from User-PC (CPE-120-145-55-210.lnse2.wel.bigpond.net.au. [120.145.55.210]) by mx.google.com with ESMTPSA id zb2sm23093537pbb.45.2014.06.29.05.40.14 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 29 Jun 2014 05:40:15 -0700 (PDT) MIME-Version: 1.0 X-Original-Message-Id: <53B00922.000022.04264@USER-PC> X-Original-Date: Sun, 29 Jun 2014 20:40:02 +0800 Content-Type: Multipart/Alternative; charset="iso-8859-1"; boundary="------------Boundary-00=_QIKX5BZ2QL8000000000" X-Mailer: IncrediMail (6605288) From: "frederickemoreno@gmail.com" X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 X-Original-To: "Lancair Mail (lml@lancaironline.net)" Subject: Two-blade or three-blade prop for I-550 --------------Boundary-00=_QIKX5BZ2QL8000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have a chart somewhere from Hartzell which shows the theoretical projection of prop efficiency vs speed for two vs three blade, and the th= ree blade is the winner by a small tweak, a per cent or two at the higher spe= ed. Several years old, but I do not think the part numbers have changed for the recommended Lancair props. =0D =0D Fred Moreno --------------Boundary-00=_QIKX5BZ2QL8000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I have a chart somewhere from Hartzell which shows the theoretical p= rojection of prop efficiency vs speed for two vs three blade, and the thr= ee blade is the winner by a small tweak, a per cent or two at the higher = speed. Several years old, but I do not think the part numbers= have changed for the recommended Lancair props.

Fred Moreno

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