X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from relais.videotron.ca ([24.201.245.36] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2133862 for flyrotary@lancaironline.net; Fri, 22 Jun 2007 11:34:37 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.201.245.36; envelope-from=geryvon@videotron.ca Received: from AMDSEMPRON2400 ([66.130.108.152]) by VL-MH-MR001.ip.videotron.ca (Sun Java System Messaging Server 6.2-2.05 (built Apr 28 2005)) with SMTP id <0JK100IZ5N8MP6C0@VL-MH-MR001.ip.videotron.ca> for flyrotary@lancaironline.net; Fri, 22 Jun 2007 11:34:00 -0400 (EDT) Date: Fri, 22 Jun 2007 11:33:04 -0400 From: Yvon Cournoyer Subject: Re: [FlyRotary] Re: Single rotor video To: Rotary motors in aircraft Reply-to: Yvon Cournoyer Message-id: <00b601c7b4e2$be1b7eb0$6400a8c0@AMDSEMPRON2400> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Mailer: Microsoft Outlook Express 6.00.2900.3138 Content-type: multipart/alternative; boundary="Boundary_(ID_yB+moVG7p+Ya3qY8yc7+AQ)" X-Priority: 3 X-MSMail-priority: Normal References: This is a multi-part message in MIME format. --Boundary_(ID_yB+moVG7p+Ya3qY8yc7+AQ) Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT MessageI simply cannot find the slow motion feature on my PC. Pls help! Yvon. ----- Original Message ----- From: al p wick To: Rotary motors in aircraft Sent: Monday, June 04, 2007 9:56 PM Subject: [FlyRotary] Re: Single rotor video What a great video. I ran it in slow motion. At one point I had impression that blade had flexed far enough to hit trailer! I would be very concerned for blade flex unless I had clear proof it has no long term effect. Check out the movement of wires and hoses. Makes you appreciate the import of adding supports and wire ties. I was curious if video from in front would show the same effects. If it doesn't, possibly cause is related to fore/aft blade support. Not likely, but worth checking. Excellent analysis tool, video. Good work. -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html On Mon, 4 Jun 2007 10:16:16 -0500 "Russell Duffy" writes: Greetings, I made a short video yesterday of a single rotor run. The purpose was to demonstrate and document the prop tip behavior with the stock rubber coupler/damper, so I can see if it gets any better with the new softer one. As you can see, it gets pretty wild at times, particularly when changing rpms. I'm not sure this is completely abnormal though, because I've watched the Subaru engines on the RAF2000 gyro do the exact same thing. They even have a bit of tip wandering too, so some of this may be OK. During the video, you'll hear me say 2600 rpm, and at that point, the tips are wandering fore and aft a bit. The next rpm tested was 3500, and it appears fairly smooth. You'll note that my throttle control doesn't have much friction, and closes itself if I don't hold it. By the time I say 3500 rpm into the camera, you can see that the engine has slowed down considerably, so 3500 is the point where I get up to come back to the camera, not when I say 3500. For that reason, 4000 rpm became a hand signal, and appears perfectly smooth. The video is 60 MB, so not for the dialup crowd unless you download it overnight. Also, if there's more traffic than I expect, I may have to shut the link down to preserve my web space quota for the month. http://www.radrotary.com/WL_original_damper.wmv Rusty -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html --Boundary_(ID_yB+moVG7p+Ya3qY8yc7+AQ) Content-type: text/html; charset=iso-8859-1 Content-transfer-encoding: 7BIT Message
I simply cannot find the slow motion feature on my PC. Pls help! Yvon.
----- Original Message -----
From: al p wick
Sent: Monday, June 04, 2007 9:56 PM
Subject: [FlyRotary] Re: Single rotor video

What a great video. I ran it in slow motion. At one point I had impression that blade had flexed far enough to hit trailer! I would be very concerned for blade flex unless I had clear proof it has no long term effect.
 
Check out the movement of  wires and hoses. Makes you appreciate the import of adding supports and wire ties.
 
I was curious if video from in front would show the same effects. If it doesn't, possibly cause is related to fore/aft blade support. Not likely, but worth checking.
 
Excellent analysis tool, video. Good work.
 

-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing.
Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon
Glass panel design, Subaru install, Prop construct, Risk assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
 
On Mon, 4 Jun 2007 10:16:16 -0500 "Russell Duffy" <rusty@radrotary.com> writes:
Greetings,
 
I made a short video yesterday of a single rotor run.  The purpose was to demonstrate and document the prop tip behavior with the stock rubber coupler/damper, so I can see if it gets any better with the new softer one.  
 
As you can see, it gets pretty wild at times, particularly when changing rpms.  I'm not sure this is completely abnormal though, because I've watched the Subaru engines on the RAF2000 gyro do the exact same thing.  They even have a bit of tip wandering too, so some of this may be OK.
 
During the video, you'll hear me say 2600 rpm, and at that point, the tips are wandering fore and aft a bit.  The next rpm tested was 3500, and it appears fairly smooth.  You'll note that my throttle control doesn't have much friction, and closes itself if I don't hold it.  By the time I say 3500 rpm into the camera, you can see that the engine has slowed down considerably, so 3500 is the point where I get up to come back to the camera, not when I say 3500.  For that reason, 4000 rpm became a hand signal, and appears perfectly smooth.     
 
The video is 60 MB, so not for the dialup crowd unless you download it overnight.  Also, if there's more traffic than I expect, I may have to shut the link down to preserve my web space quota for the month. 
 
 
Rusty
 
 
 
 
 

-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing.
Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon
Glass panel design, Subaru install, Prop construct, Risk assessment info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
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