X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 03 Aug 2005 10:59:49 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d21.mx.aol.com ([205.188.144.207] verified) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 622548 for lml@lancaironline.net; Tue, 02 Aug 2005 14:16:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.207; envelope-from=JIMRHER@aol.com Received: from JIMRHER@aol.com by imo-d21.mx.aol.com (mail_out_v38_r4.1.) id q.dc.2ae6bc8d (4410) for ; Tue, 2 Aug 2005 14:15:50 -0400 (EDT) From: JIMRHER@aol.com X-Original-Message-ID: X-Original-Date: Tue, 2 Aug 2005 14:15:50 EDT Subject: Turbine Revolution X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1123006550" X-Mailer: 9.0 SE for Windows sub 5016 X-Spam-Flag: NO -------------------------------1123006550 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit This is a interesting artical on the small turbine engine; Jim Hergert (example) Building on this work, Innodyn has developed the 500-shp TwinPack, which combines two of its 250-shp turbines through a common gearbox. The two-engines-in-one powerplant is estimated to consume about 35 gph at full power, about the same as 500-shp versions of the venerable Pratt & Whitney Canada PT6A. Testing of a prototype TwinPack is scheduled to start later this year, according to Grose. The TwinPack weighs in at about 330 pounds, which is slightly heavier than a 500-shp PT6A at 286 pounds. However, the Innodyn engine is more compact, with dimensions of 29 inches long, 24 inches wide and 14 inches high. The PT6A is only 19 inches wide but 62 inches long, requiring a much longer engine compartment. This can especially be a problem when re-engining aircraft with the P&WC engine. For complete artical, go to; _http://www.ainonline.com/issues/08_05/08_05_smallengines_08.html_ (http://www.ainonline.com/issues/08_05/08_05_smallengines_08.html) Aviation International News is a publication of The Convention News Co., In addition, I have a P&W PT6 publication that shows the LB/ESHP/HR for all the PT6 engines. They put them in three classes, Small, Medium, and Large. The Thermodynamic Equivalent Specific Fuel Consumption, ESFC ranges form .66 for the Small class to .52 for the Large class. Large is over 1000HP. That is about as good a Specific as I have heard about with turbines. I think the Garrett 331 gets down to .50 LB/ESHP/HR. -------------------------------1123006550 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

This is a interesting artical on the small turbine engine;

Jim Hergert

(example)

Building on this work, Innodyn has develope= d the=20 500-shp TwinPack, which combines two of its 250-shp turbines through a commo= n=20 gearbox. The two-engines-in-one powerplant is estimated to consume about 35=20= gph=20 at full power, about the same as 500-shp versions of the venerable Pratt &am= p;=20 Whitney Canada PT6A. Testing of a prototype TwinPack is scheduled to start l= ater=20 this year, according to Grose.

The TwinPack weighs in at about 330=20 pounds, which is slightly heavier than a 500-shp PT6A at 286 pounds. However= ,=20 the Innodyn engine is more compact, with dimensions of 29 inches long, 24 in= ches=20 wide and 14 inches high. The PT6A is only 19 inches wide but 62 inches long,= =20 requiring a much longer engine compartment. This can especially be a problem= =20 when re-engining aircraft with the P&WC engine.

For complete artical, go to;

ht= tp://www.ainonline.com/issues/08_05/08_05_smallengines_08.html

Aviation International News is a publication of T= he=20 Convention News Co.,

In addition, I have a P&W PT6 publication tha= t=20 shows the LB/ESHP/HR for all the PT6 engines. They put them in three classes= ,=20 Small, Medium, and Large. The Thermodynamic Equivalent Specific Fuel=20 Consumption, ESFC ranges form .66 for the Small class to .52 for the Large=20 class. Large is over 1000HP. That is about as good a Specific as I have hear= d=20 about with turbines. I think the Garrett 331 gets down to .50 LB/ESHP/HR.

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