X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf18aec.mail.bellsouth.net ([205.152.59.66] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2083311 for flyrotary@lancaironline.net; Mon, 04 Jun 2007 11:16:55 -0400 Received-SPF: none receiver=logan.com; client-ip=205.152.59.66; envelope-from=rusty@radrotary.com Received: from ibm61aec.bellsouth.net ([65.6.194.9]) by imf18aec.mail.bellsouth.net with ESMTP id <20070604151616.EGYQ18329.imf18aec.mail.bellsouth.net@ibm61aec.bellsouth.net> for ; Mon, 4 Jun 2007 11:16:16 -0400 Received: from rd ([65.6.194.9]) by ibm61aec.bellsouth.net with ESMTP id <20070604151615.BSUB25479.ibm61aec.bellsouth.net@rd>; Mon, 4 Jun 2007 11:16:15 -0400 From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: Single rotor video Date: Mon, 4 Jun 2007 10:16:16 -0500 Message-ID: <009901c7a6bb$4c2cfb60$6e01a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_009A_01C7A691.6356F360" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6822 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 Importance: Normal Thread-Index: AcemuvbBm6jSMaH1Ro61x3rEPClrag== This is a multi-part message in MIME format. ------=_NextPart_000_009A_01C7A691.6356F360 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Greetings, =20 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. =20 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.=20 =20 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. =20 =20 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. =20 =20 http://www.radrotary.com/WL_original_damper.wmv =20 Rusty=20 =20 =20 =20 =20 ------=_NextPart_000_009A_01C7A691.6356F360 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
I made a short = video=20 yesterday of a single rotor run.  The purpose was to demonstrate = and=20 document the prop tip behavior with the stock rubber coupler/damper, so = I can=20 see if it gets any better with the new softer one.  =20
 
As you can see, = it gets=20 pretty wild at times, particularly when changing rpms.  I'm not = sure this=20 is completely abnormal though, because I've watched the Subaru engines = on the=20 RAF2000 gyro do the exact same thing.  They even have a bit of tip=20 wandering too, so some of this may be OK.
 
During the = video, you'll=20 hear me say 2600 rpm, and at that point, the tips are wandering fore and = aft a=20 bit.  The next rpm tested was 3500, and it appears fairly = smooth. =20 You'll note that my throttle control doesn't have much friction, = and closes=20 itself if I don't hold it.  By the time I say 3500 rpm into the = camera, you=20 can see that the engine has slowed down considerably, so 3500 is the = point where=20 I get up to come back to the camera, not when I say 3500.  For = that=20 reason, 4000 rpm became a hand signal, and appears perfectly = smooth. =20    
 
The video is 60 = MB, so not=20 for the dialup crowd unless you download it overnight.  Also, if = there's=20 more traffic than I expect, I may have to shut the link down to preserve = my web=20 space quota for the month. 
 
http://www.radro= tary.com/WL_original_damper.wmv
 
Rusty =
 
 
 
 
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