Return-Path: Received: from ms-smtp-05.texas.rr.com ([24.93.36.233] verified) by logan.com (CommuniGate Pro SMTP 4.1.4) with ESMTP id 2600400 for flyrotary@lancaironline.net; Tue, 23 Sep 2003 13:40:27 -0400 Received: from dell (cs6669241-190.austin.rr.com [66.69.241.190]) by ms-smtp-05.texas.rr.com (8.12.8/8.12.2) with SMTP id h8NHH39E017165 for ; Tue, 23 Sep 2003 12:17:11 -0500 (CDT) Message-ID: <006101c381f9$c1903880$6401a8c0@austin.rr.com> From: "Bob Darrah" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Power on a cold day was Re: [FlyRotary] Re:Some turbo thoughts from a pro .... Date: Tue, 23 Sep 2003 12:40:18 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005E_01C381CF.D8664420" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_005E_01C381CF.D8664420 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jim, me thinks you might be off by a decimal place or two in your rate = of climb increase figures. I figure an additional 33 fpm (total = 1033fpm) with a 2hp increase. Also just a theory Bob Darrah ----- Original Message -----=20 From: Jim Sower=20 To: Rotary motors in aircraft=20 Sent: Tuesday, September 23, 2003 9:19 AM Subject: [FlyRotary] Re: Power on a cold day was Re: [FlyRotary] = Re:Some turbo thoughts from a pro .... True. But that 2% increase in power is ALL EXCESS THRUST (over and = above what it takes to hold exactly what you've got - say 90 kts and = 1000 fpm climb). Two hp would be 66000 #'/min which with a 2000# = airplane produces 3300 fpm rate of climb - ABOVE what you started with = !! Just a theory .... Jim S.=20 ------=_NextPart_000_005E_01C381CF.D8664420 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jim,  me thinks you might be off by a decimal = place or=20 two in your rate of climb increase figures.  I figure an additional = 33 fpm=20 (total 1033fpm) with a 2hp increase.
 
Also just a theory
Bob Darrah
----- Original Message -----
From:=20 Jim=20 Sower
Sent: Tuesday, September 23, = 2003 9:19=20 AM
Subject: [FlyRotary] Re: Power = on a cold=20 day was Re: [FlyRotary] Re:Some turbo thoughts from a pro ....


True.  But that 2% increase in power is ALL = EXCESS=20 THRUST (over and above what it takes to hold exactly what you've got - = say 90=20 kts and 1000 fpm climb).  Two hp would be 66000 #'/min which with = a 2000#=20 airplane produces 3300 fpm rate of climb - ABOVE what you started with = !!  Just a theory .... Jim S.
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