X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail28.syd.optusnet.com.au ([211.29.133.169] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTPS id 2084502 for flyrotary@lancaironline.net; Tue, 05 Jun 2007 02:06:08 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.169; envelope-from=lendich@optusnet.com.au Received: from george (d220-237-205-137.dsl.nsw.optusnet.com.au [220.237.205.137]) by mail28.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id l5565LEA016358 for ; Tue, 5 Jun 2007 16:05:22 +1000 Message-ID: <003501c7a737$8235eb00$89cdeddc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Single rotor video Date: Tue, 5 Jun 2007 16:05:23 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0032_01C7A78B.53092730" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0032_01C7A78B.53092730 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message : [FlyRotary] Single rotor video Rusty, Very good video demonstration - I personally found it very = informative. Good trailer set-up, you' have done a great job! If you do one that goes to 7,500 and 6,000, I would love to see that = as well. I don't understand what's going on with the prop, wobble - what sort = of PSRU are you using. Could it be the dampers? Again, Thanks! George ( down under) 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. =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 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 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 http://www.radrotary.com/WL_original_damper.wmv Rusty=20 ------=_NextPart_000_0032_01C7A78B.53092730 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
: [FlyRotary] Single rotor video
Rusty,
Very good video demonstration - I personally found it very=20 informative. Good trailer set-up, you' have done a great = job!
If you do one that goes to 7,500 and 6,000, I would love to see = that as=20 well.
I don't understand what's going on with the prop, wobble - what = sort of=20 PSRU are you using.
Could it be the dampers?
Again, Thanks!
George ( down under)

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=20 closes itself if I don't hold it.  By the time I say 3500 rpm = into the=20 camera, you can see that the engine has slowed down considerably, so = 3500 is=20 the point where I get up to come back to the camera, not when I say=20 3500.  For that reason, 4000 rpm became a hand signal, and = appears=20 perfectly smooth.     
 
The video is = 60 MB, so=20 not for the dialup crowd unless you download it overnight.  Also, = if=20 there's more traffic than I expect, I may have to shut the link down = to=20 preserve my web space quota for the month. 
 
http://www.radro= tary.com/WL_original_damper.wmv
 
Rusty=20
 
 
 
 
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