X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from eastrmmtao104.cox.net ([68.230.240.46] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4195460 for flyrotary@lancaironline.net; Sun, 04 Apr 2010 23:23:29 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.46; envelope-from=tmann@n200lz.com Received: from eastrmimpo02.cox.net ([68.1.16.120]) by eastrmmtao104.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100405032253.HVKT18026.eastrmmtao104.cox.net@eastrmimpo02.cox.net> for ; Sun, 4 Apr 2010 23:22:53 -0400 Received: from testPC ([98.168.254.7]) by eastrmimpo02.cox.net with bizsmtp id 1fNs1e0050ALyG202fNsFj; Sun, 04 Apr 2010 23:22:53 -0400 X-VR-Score: -25.00 X-Authority-Analysis: v=1.1 cv=lL4dQe6A0XfTYzqIbzpq/h+TkgPEjAvcHnuEPneVQrQ= c=1 sm=1 a=u3n+HnEbI1wdzZeyJY7NnA==:17 a=Ia-xEzejAAAA:8 a=YWISOAoqAAAA:8 a=nuLrYxBgId4G03LSxZ8A:9 a=8qho538UDJDAQZYRdqQA:7 a=YXkbsD-4RCVT9P5jHxQJ99vDfuMA:4 a=wPNLvfGTeEIA:10 a=VvPTdWEW8HYA:10 a=EzXvWhQp4_cA:10 a=7pmbdrgO23PYEtGP:21 a=5xfRDlu90zdK9Y3y:21 a=SSmOFEACAAAA:8 a=Y2VNeNrzAAAA:8 a=yMhMjlubAAAA:8 a=TW66zc2HAAAA:8 a=HQ31llbKAAAA:8 a=YDxiqzLvjbrsUxg2o4MA:9 a=L7chZXJzAfwDVAfU6sMA:7 a=uU2Cu-s7eHnhQK4wd46A923z9coA:4 a=u3n+HnEbI1wdzZeyJY7NnA==:117 X-CM-Score: 0.00 From: "Thomas Mann" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] youtube strobe Date: Sun, 4 Apr 2010 22:22:55 -0500 Message-ID: <012e01cad46f$48f2cad0$dad86070$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_012F_01CAD445.601CC2D0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcrUbh4aCCCX796NRQyNH1NTCXaMEgAAJA2Q Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_012F_01CAD445.601CC2D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kevin, I would not run without the prop. Get a =91One Touch=92 prop rpm device = (around $45) . There usually is someone that has one. A guy in my EAA chapter = has one. The local AP would have one. =20 An example is on page 17 of the April edition of EAA=92s Sport Aviation. =20 Money well spent! =20 T Mann =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane Sent: Sunday, April 04, 2010 10:13 PM To: Rotary motors in aircraft Subject: [FlyRotary] youtube strobe =20 I questioned my tach accuracy in my video. it was shot at 30 fps, or = 1800 f/min. I saw the engine start and indicate about 300rpm, and 6 prop = blade blurs show. I sped it up until it started to die at 1500 rpm indicated.[prop blur shows reverse rotation]. at what I'd guess was indicating 1000rpm the prop shows as a steady, 2-bladed non-rotating = blur. assuming that the camera is catching the same prop blade twice, 180=B0 = apart, that would be at half the 1800 rpm on the camera, right? so, 900rpm = isn't far from my guess of 1000rpm [from memory based on how the engine = sounded in the video]. same for 300rpm/6 blade blur - 1800/6 =3D 300 rpm. still = seems like a lot of wind for 300rpm, considering my Lycoming idles at twice = that speed, but then, I'm typically inside the cockpit, and the test prop 68x66(?) [from a 150hp rv-4]. =20 I intend to run it without the prop in a week so I can check my timing without endangering my life. the msd ignition box has 3000/6000/9000rpm limiter pills which can assist in keeping limits, altho the trailing ignitions have none. I can attempt to run the ignitions separately, no = idea if it will run that way at this point. another option would be to tow = it over to pineapple racing and hear what rob golden has to say. they are = just on the other side of the airport. =20 =20 KevinLane Carpentry www.KevinLaneCarpentry.com ------=_NextPart_000_012F_01CAD445.601CC2D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Kevin,

I would not run without the prop. Get a ‘One = Touch’ prop rpm device (around $45) . There usually is someone that has one. A = guy in my EAA chapter has one. The local AP would have = one.

 

An example is on page 17 of the April edition of = EAA’s Sport Aviation.

 

Money well spent!

 

T Mann

 

 

From:= Rotary = motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin = lane
Sent: Sunday, April 04, 2010 10:13 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] youtube strobe

 

I = questioned my tach accuracy in my video.  it was shot at 30 fps, or 1800 = f/min.  I saw the engine start and indicate about 300rpm, and 6 prop blade blurs show.  I sped it up until it started to die at 1500 rpm = indicated.[prop blur shows reverse rotation].   at what I'd guess was indicating = 1000rpm the prop shows as a steady, 2-bladed non-rotating blur.  = assuming that the camera is catching the same prop blade twice, 180=B0 apart, = that would be at half the 1800 rpm on the camera, right?  so, 900rpm isn't far = from my guess of 1000rpm [from memory based on how the engine sounded in = the video].   same for 300rpm/6 blade blur - 1800/6 =3D 300 rpm.   still seems like a lot of wind for 300rpm, considering = my Lycoming idles at twice that speed, but then, I'm typically inside the = cockpit, and the test prop  68x66(?) [from a 150hp = rv-4].

 

I = intend to run it without the prop in a week so I can check my timing without endangering = my life.  the msd ignition box has 3000/6000/9000rpm limiter = pills which can assist in keeping limits, altho the trailing ignitions have = none.  I can attempt to run the ignitions separately, no idea if it will run that = way at this point.  another option would be to tow it over to pineapple = racing and hear what rob golden has to say.  they are just on the = other side of the airport.

 

 

KevinLane Carpentry
www.KevinLaneCarpentry.com=

------=_NextPart_000_012F_01CAD445.601CC2D0--