X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from aspensprings.uwyo.edu ([129.72.10.32] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTPS id 3499155 for flyrotary@lancaironline.net; Wed, 18 Feb 2009 12:08:53 -0500 Received-SPF: none receiver=logan.com; client-ip=129.72.10.32; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht1.uwyo.edu (ponyexpress-ht1.uwyo.edu [10.84.60.208]) by aspensprings.uwyo.edu (8.13.8/8.13.8) with ESMTP id n1IH7UIr022992 for ; Wed, 18 Feb 2009 10:08:09 -0700 (MST) (envelope-from SBoese@uwyo.edu) Received: from TELEGRAPH1.uwyo.edu (10.84.60.121) by ponyexpress-ht1.uwyo.edu (10.84.60.208) with Microsoft SMTP Server id 8.1.340.0; Wed, 18 Feb 2009 10:07:54 -0700 Received: from UWMAIL.uwyo.edu ([172.26.4.76]) by TELEGRAPH1.uwyo.edu with Microsoft SMTPSVC(6.0.3790.3959); Wed, 18 Feb 2009 10:07:53 -0700 Received: from Boesexps ([10.4.44.41]) by UWMAIL.uwyo.edu with Microsoft SMTPSVC(6.0.3790.3959); Wed, 18 Feb 2009 10:07:53 -0700 From: sboese To: "'Rotary motors in aircraft'" Subject: staging Date: Wed, 18 Feb 2009 10:07:26 -0700 Message-ID: <7127BF45A5AD47B29FF7E72A0EBF95A6@gg.uwyo.edu> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C991B0.B372DA10" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Importance: Normal X-OriginalArrivalTime: 18 Feb 2009 17:07:53.0759 (UTC) FILETIME=[6FE80AF0:01C991EB] ------=_NextPart_000_000D_01C991B0.B372DA10 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Tracy and all, Looking back at the data I was using when thinking about my "staging = bog", I realize that the manifold pressures I am looking at are values I = calculate from the EC2 data. My conversion to units of inches Hg may not be = correct. Either my EC2 manifold pressure sensor may have changed calibration or I = may have never had this conversion correct to begin with. I have only one program to do this and may not have it right. How Tracy keeps track of = all the versions of EC's is beyond me.=20 In any case, I can NOT say with certainty that my EC2 is internally inconsistent as I stated in my previous message. I apologize if this = has caused you to waste any of your valuable time and energy over this. The reason I am concerned with staging more than many others might be is that at the ground level density altitudes of my home airport, the = maximum manifold pressure I see is about 23 inches and of course it gradually = drops off from there as I climb. This results in staging taking place during critical flight regimes. Encountering an extended "bog" right after = take off is not my idea of fun. If I cannot get the staging to work well = using mode 6, I am considering David Leonard's suggestion of moving the = staging point to a higher manifold pressure where I will not normally encounter = it. In my case this is need not be much of a change. The manual indicates = that some modes are active only when the engine is running. Is this the case with mode 7? I'm trying to make sure I can set the staging point with a pressure source other than the engine. This does generate the potential for my next trip to lower altitudes to = be memorable. I just have to remember that this is venturing into unknown territory again and that full throttle operation may not be reliable = until tuning at the higher power settings accessible at lower altitudes has = been accomplished. Again, my apologies to especially to Tracy and also the rest of you. Steve Boese =20 =20 =20 ------=_NextPart_000_000D_01C991B0.B372DA10 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Tracy and all,

Looking back at the data I was = using when thinking about my “staging bog”, I realize that the manifold pressures I am looking at are values I calculate from the EC2 = data. My conversion to units of inches Hg may not be correct. Either my EC2 manifold pressure sensor may have changed calibration or I may have = never had this conversion correct to begin with. I have only one program to do = this and may not have it right. How Tracy keeps track of all the versions = of EC’s is beyond me.

In any case, I can NOT say with = certainty that my EC2 is internally inconsistent as I stated in my previous = message. I apologize if this has caused you to waste any of your valuable time = and energy over this.

The reason I am concerned with = staging more than many others might be is that at the ground level density = altitudes of my home airport, the maximum manifold pressure I see is about 23 inches = and of course it gradually drops off from there as I climb. This results = in staging taking place during critical flight regimes. Encountering = an extended “bog” right after take off is not my idea of = fun. If I cannot get the staging to work well using mode 6, I am considering = David Leonard’s suggestion of moving the staging point to a higher = manifold pressure where I will not normally encounter it. In my case this = is need not be much of a change. The manual indicates that some modes are = active only when the engine is running. Is this the case with mode = 7? I’m trying to make sure I can set the staging point with a pressure source = other than the engine.

This does generate the potential = for my next trip to lower altitudes to be memorable. I just have to remember = that this is venturing into unknown territory again and that full throttle = operation may not be reliable until tuning at the higher power settings accessible = at lower altitudes has been accomplished.

Again, my apologies to especially = to Tracy and also the rest of you.

Steve Boese

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