X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTPS id 3743886 for flyrotary@lancaironline.net; Fri, 03 Jul 2009 12:14:17 -0400 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht1.uwyo.edu (ponyexpress-ht1.uwyo.edu [10.84.60.208]) by willowsprings.uwyo.edu (8.14.2/8.14.2) with ESMTP id n63GDX3C016817 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Fri, 3 Jul 2009 10:13:33 -0600 (MDT) (envelope-from SBoese@uwyo.edu) Received: from sboesetablet (172.26.4.5) by uwmail.uwyo.edu (10.84.60.198) with Microsoft SMTP Server id 8.1.375.2; Fri, 3 Jul 2009 10:13:30 -0600 From: Steven Boese To: "'Rotary motors in aircraft'" In-Reply-To: Subject: RE: [FlyRotary] Re: frustrating couple of days Date: Fri, 3 Jul 2009 10:13:18 -0600 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C9FBC6.E3F9DFF0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 ------=_NextPart_000_000C_01C9FBC6.E3F9DFF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mike, Is 3000 rpm above your staging point? If the corruption of the controller only happens when changing from A to B above the staging point, check to see if one or both secondary injectors have lower resistance than specified. Steve Boese -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills Sent: Friday, July 03, 2009 9:50 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: frustrating couple of days Dave, Thanks for the offer and the input. Swapping my EC into your plane would be a desperation last move due to all of the hassles involved. And as you say would not necessarily prove anything. I said it happens when I'm preparing to fly, but that isnt entirely accurate. It would be more accurate to say that in the past it has happened only when I have switched to the back-up controller which usually occurs in prep for flight. This past weekend I had fired it up and taxied down to EAA for lunch. After lunch I taxied back to my hangar and prior to shutting down I ran the engine up to about 3000 RPM and switched to the B controller. The engine died and I had to copy the A program to B to get it to run on B. Switching to B was the only pre takeoff checklist item I performed. I think about the only thing you hit on here that might be related is heat. But hard to say without more instances of failure and a way to link cause and effect. On saturday when the engine quit on B the engine was completely cowled. On sunday when I had the second instance of an engine quitting on B, the upper cowl was off but the lower was on. When the staging point was lost the upper was off, lower on. Yesterday when the engine quit on the first attempt at switching to B the engine was completely uncowled. Maybe I'll run it up a few more times today uncowled and if it works OK, try putting the cowl back on and see if I can induce failure. Doesnt seem likely though that anything under cowl could cause this sort of problem. This may all have to wait until Tracy weighs in with his opinion. I'm not inclined to make drastic changes until I hear from him. Thanks, Mike ------=_NextPart_000_000C_01C9FBC6.E3F9DFF0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mike,

Is 3000 rpm above your staging = point? If the corruption of the = controller only happens when changing from A to B above the staging point, check to see = if one or both secondary injectors have lower resistance than = specified.

Steve Boese

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: = Friday, July 03, = 2009 9:50 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: frustrating couple of days

Dave,

Thanks for the offer and = the input. Swapping my EC into your plane would be a desperation last move due to = all of the hassles involved. And as you say would not necessarily prove = anything.

I said it happens when I'm = preparing to fly, but that isnt entirely accurate. It would be more accurate to = say that in the past it has happened only when I have switched to the = back-up controller which usually occurs in prep for flight. This past = weekend I had fired it up and taxied down to EAA for lunch. After lunch I taxied = back to my hangar and prior to shutting down I ran the engine up to about 3000 = RPM and switched to the B controller. The engine died and I had to copy the A = program to B to get it to run on B. Switching to B was the only pre takeoff = checklist item I performed.

I think about the only = thing you hit on here that might be related is heat. But hard to say without more = instances of failure and a way to link cause and effect. On saturday when the = engine quit on B the engine was completely cowled. On sunday when I had the = second instance of an engine quitting on B, the upper cowl was off but the = lower was on. When the staging point was lost the upper was off, lower on. = Yesterday when the engine quit on the first attempt at switching to B the engine = was completely uncowled. Maybe I'll run it up a few more times today = uncowled and if it works OK, try putting the cowl back on and see if I can induce = failure. Doesnt seem likely though that anything under cowl could cause this sort = of problem.

This may all have to wait = until Tracy weighs in with his opinion. I'm not inclined to make drastic changes until I hear = from him.

Thanks,

Mike

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