X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 02 Aug 2005 12:02:36 -0400 Message-ID: X-Original-Return-Path: Received: from sccrmhc13.comcast.net ([63.240.76.28] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 622263 for lml@lancaironline.net; Tue, 02 Aug 2005 09:57:08 -0400 Received-SPF: none receiver=logan.com; client-ip=63.240.76.28; envelope-from=mjrav@comcast.net Received: from mark1 (c-65-96-140-242.hsd1.ma.comcast.net[65.96.140.242]) by comcast.net (sccrmhc13) with SMTP id <2005080213562101300qj846e>; Tue, 2 Aug 2005 13:56:21 +0000 X-Original-Message-ID: <003d01c5976b$16e0e720$f28c6041@mark1> From: "Mark Ravinski" X-Original-To: "Lancair Mailing List" Subject: Re: Turbine revolution X-Original-Date: Tue, 2 Aug 2005 10:04:24 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003A_01C59749.8FA79AE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1506 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 This is a multi-part message in MIME format. ------=_NextPart_000_003A_01C59749.8FA79AE0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable I'm not much familiar with these engines but it is not too appropriate = to compare them with piston engines at low altitude. Turbines come into their own in thin air. You don't see airliners cruising below 10,000 ft. The T-38's I flew had the same fuel consumption at idle on the ground as = they did cruising at high altitude. (pistons have trouble with that) If there is a practical use for these engines, it's probably more for = the long range, high altitude flights and comparisons should be made = over the whole flight profile. Turbines are sometimes used at low altitudes where lots of power and = light weight are needed at the expense of fuel economy. Examples are helicopters and the "Oracle" showplane. Mark Ravinski . ------=_NextPart_000_003A_01C59749.8FA79AE0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

I'm not much familiar with these = engines but it is=20 not too appropriate to compare them with piston engines at low=20 altitude.

Turbines come into their own in thin=20 air.

You don't see airliners cruising below = 10,000=20 ft.

The T-38's I flew had the same fuel = consumption at=20 idle on the ground as they did cruising at high altitude. (pistons = have=20 trouble with that)

If there is a practical use for these = engines, it's=20 probably more for the long range, high altitude flights and comparisons = should=20 be made over the whole flight profile.

Turbines are sometimes used at low = altitudes where=20 lots of power and light weight are needed at the expense of fuel=20 economy.

Examples are helicopters and the = "Oracle"=20 showplane.

Mark Ravinski

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