X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 13 Jul 2012 11:41:47 -0400 Message-ID: X-Original-Return-Path: Received: from imr-mb01.mx.aol.com ([64.12.207.164] verified) by logan.com (CommuniGate Pro SMTP 5.4.6) with ESMTP id 5650284 for lml@lancaironline.net; Fri, 13 Jul 2012 09:16:44 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.207.164; envelope-from=Sky2high@aol.com Received: from mtaomg-mb06.r1000.mx.aol.com (mtaomg-mb06.r1000.mx.aol.com [172.29.41.77]) by imr-mb01.mx.aol.com (8.14.1/8.14.1) with ESMTP id q6DDG3tn025708 for ; Fri, 13 Jul 2012 09:16:03 -0400 Received: from core-mtd004c.r1000.mail.aol.com (core-mtd004.r1000.mail.aol.com [172.29.235.205]) by mtaomg-mb06.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 1EC3DE000081 for ; Fri, 13 Jul 2012 09:16:03 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <7f78b.2696186d.3d317992@aol.com> X-Original-Date: Fri, 13 Jul 2012 09:16:03 -0400 (EDT) Subject: Re: [LML] TAS for Red Line X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_7f78b.2696186d.3d317992_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:508569376:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d294d50001f935cf7 --part1_7f78b.2696186d.3d317992_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en Steve, =20 The purpose of that article was to warn builders that over-powering =20 (biggest engine possible) an aircraft can lead to exceeding some of the des= ign =20 parameters of the aircraft. Most airplanes are designed such that Vne (as= =20 measured by airspeed) falls well within flutter and other destructive force= s =20 that could occur at some limiting max True (or Equivalent) airspeed. This= =20 is certainly true of NA aircraft since the IAS at high altitudes, when =20 converted to TAS, is usually nowhere near the Vne. If the designer expect= ed=20 turbo charging or turbines to be used, that should have been taken into th= e=20 Max IAS consideration. "Overpowering" might be a concern of those IVs that= =20 have been converted to Jet Props. Ask the factory. =20 Uh, the terminal dive speed attainable by a Lancair may be another story. =20 Scott Krueger =20 =20 In a message dated 7/12/2012 9:26:16 P.M. Central Daylight Time, =20 mcmess1919@yahoo.com writes: =20 Having coffee with some high time pilots this morning, the subject of=20 Never Exceed Speed came up. Before I read the original Van=E2=80=99s arti= cle years=20 ago, I thought Indicated Airspeed was the indicator=E2=80=A6 WRONG, it is= True=20 Airspeed. Does your EFIS display TAS or do you have a table for reference= ?? =20 _http://www.vansaircraft.com/pdf/hp_limts.pdf_=20 (http://www.vansaircraft.com/pdf/hp_limts.pdf) =20 Steve Colwell Legacy --part1_7f78b.2696186d.3d317992_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
Steve,
 
The purpose of that article was to warn builders that over-powering=20 (biggest engine possible) an aircraft can lead to exceeding some of the des= ign=20 parameters of the aircraft.  Most airplanes are designed such tha= t Vne=20 (as measured by airspeed) falls well within flutter and other destructive f= orces=20 that could occur at some limiting max True (or Equivalent) airspeed.&n= bsp;=20 This is certainly true of NA aircraft since the IAS at high altitudes, when= =20 converted to TAS, is usually nowhere near the Vne.  If the design= er=20 expected turbo charging or turbines to be used, that should have been taken= into=20 the Max IAS consideration. "Overpowering" might be a concern of t= hose=20 IVs that have been converted to Jet Props.  Ask the factory.
 
Uh, the terminal dive speed attainable by a Lancair may be= =20 another story.
 
Scott Krueger
 
In a message dated 7/12/2012 9:26:16 P.M. Central Daylight Time,=20 mcmess1919@yahoo.com writes:
=

Having coffee with so= me high=20 time pilots this morning, the subject of Never Exceed Speed came up. = ;=20 Before I read the original Van=E2=80=99s article years ago, I thought Ind= icated=20 Airspeed was the indicator=E2=80=A6  WRONG, it is True Airspeed.&nbs= p; Does your=20 EFIS display TAS or do you have a table for reference?? =20

 

http://www.vansairc= raft.com/pdf/hp_limts.pdf =20

 

Steve Colwell = =20 Legacy

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