X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail.lincsatmail.com ([207.179.143.254] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 928733 for flyrotary@lancaironline.net; Mon, 16 Jan 2006 14:36:24 -0500 Received-SPF: neutral receiver=logan.com; client-ip=207.179.143.254; envelope-from=echolakeresort@telus.net Received: from echolake-cc8a26 ([204.101.233.132]) (authenticated bits=0) by mail.lincsatmail.com (8.12.10/8.12.10) with ESMTP id k0GJZKbV001107 for ; Mon, 16 Jan 2006 15:35:25 -0400 MIME-Version: 1.0 Message-Id: <43CAFE7E.000001.00148@ECHOLAKE-CC8A26> Date: Sun, 15 Jan 2006 18:01:34 -0800 (Pacific Standard Time) Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_MMX5QL80000000000000" X-Mailer: IncrediMail (4502089) From: "Echo Lake Fishing Resort (Georges Boucher)" References: To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] shake, rattle and hum X-FID: FLAVOR00-NONE-0000-0000-000000000000 X-Priority: 3 X-Xplornet-MailScanner-Information: Please contact the ISP for more information X-Xplornet-MailScanner: Found to be clean X-MailScanner-From: echolakeresort@telus.net --------------Boundary-00=_MMX5QL80000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Rusty=0D Just a thought, would changing the prop position in by one or two bolt ho= les make a difference? By the way guys after dismantling 5 13bs I still don't have any good rotor housings. Has any one got a couple of mint ones for sale? I'm in Canada.=0D Georges B. =0D =0D -------Original Message-------=0D =0D From: Russell Duffy=0D Date: 01/15/06 17:04:34=0D To: Rotary motors in aircraft=0D Subject: [FlyRotary] shake, rattle and hum=0D =0D Greetings,=0D =0D I went out to the airport this afternoon to try to add some flywheel weig= ht to the single rotor. Installed longer AN-7 bolts, each with an additiona= l 4 larger washers, and 5 small washers. This added about 26 ounces to the flexplate, at the 4 dampener bolt locations.=0D =0D Unfortunately, it didn=92t change a thing wrt the vibration issues, or pr= op oscillation. Still shaky around 1000 rpm, severe drive rattle around 1900-2000 rpm (can't bear to try to find the exact range), and severe vibration from 2500-3100. From 3300 to 5000 it's pretty smooth, but with the scary prop oscillation getting worse and worse as the rpm increases. = =0D =0D Not sure what to try next. I do have a two blade IVO prop that I could t= ry in place of the 3 blade Warp Drive, but I=92d have to cut the blades down= from 72=94 to 68=94 to clear the fuselage tube. The torque reversals might no= t be the best thing for an IVO prop either. I=92m starting to fear that someo= ne=92s going to get a deal on an RD-1C drive while I look for another solution, = and build an RV-8. =0D =0D I=92m still finding that I don=92t have enough fuel at anything above idl= e. I was actually having to run the cold start, and mixture above 12:00 to hav= e a mid range O2 reading at 3000-4000 rpm. I set mode 3 today, and kept rais= ing the fuel until I got a mid range reading with the mixture at 12:00, and n= o cold start engaged. This took 24 clicks!!! Something just ain't right h= ere =2E. =0D =0D Before I started today, I checked the fuel pressure using a mighty-vac pu= mp to simulate changes to the MAP line. The regulator changed pressure just like it=92s supposed to. =0D =0D I made myself a note to check the fuel pressure calibration again the nex= t time I go to the hanger. I set this using a different sensor, that I believed to be the same as the one that=92s installed on the regulator. = That should have gotten me very close, unless I accidentally used a sensor tha= t was different (30 psi rather than 80 psi for example). Once I had the fu= el pressure =93calibrated=94 on the EM-2, I used that reading to set the adj= ustable regulator for 42 psi. Maybe my pressure "reads" 42 psi, but is really wa= y low, like 15 psi or so.=0D =0D If the fuel pressure is correct, I=92ll have to look into the injectors themselves. They=92re 400 cc/min MSD injectors, just like what was on th= e RV-3. These were ordered just for this, and never used on anything else,= so maybe I was sent something smaller than 400 cc/min. Worst case, I have a pair of 525=92s that I can install if needed. =0D =0D Ah, the fun begins. Pity I don't have time to fiddle with this much now. The QB RV-8 will be here soon. =0D =0D Cheers,=0D Rusty (the weather geek)=0D =0D PS- The following link is the weather station in my back yard. The wind gust readings don't seem to be reporting correctly by the Weather Underground software, but otherwise, it's pretty cool. My hope is that w= e ll never get another hurricane, now that I'm set up to record the wind conditions. =0D =0D http://www.weatherunderground.com/weatherstation/WXDailyHistory asp?ID=3DKFLNAVAR7=0D =0D =0D =20 --------------Boundary-00=_MMX5QL80000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Rusty
Just a thought, would changing the prop position in by one or t= wo bolt holes make a difference? By the way guys after dismantling 5 13bs= I still don't have any good rotor housings. Has any one got a couple of = mint ones for sale? I'm in Canada.
Georges B. 
 
-------Original Message-------
 
Date: 01/15/06 17:= 04:34
Subject: [FlyRotar= y] shake, rattle and hum
 
<= FONT face=3DArial>Greetings,
&n= bsp;

I went out to the airport this afternoon to= try to add some flywheel weight to the single rotor.  Instal= led longer AN-7 bolts, each with an additional 4 larger washers, and 5 sm= all washers.  This added ab= out 26 ounces to the flexplate, at the 4 dampener bolt locations.<= /P>

 

Unf= ortunately, it didn=92t change a thing wrt the vibration issues, or prop = oscillation.  Still shaky around 1000 rpm, severe drive rattle around= 1900-2000 rpm (can't bear to try to find the exact range),  and sev= ere vibration from 2500-3100.  From 3300 to 5000 it's pretty smooth,= but with the scary prop oscillation getting worse and worse as the rpm i= ncreases. 

 

Not= sure what to try next.  I = do have a two blade IVO prop that I could try in place of the 3 blade Warp Drive, but I=92d ha= ve to cut the blades down from 72=94 to 68=94 to clear the fuselage tube.=   The torque reversals might not be the best thing for an IVO prop ei= ther.  I=92m starting to fear that someone=92s going t= o get a deal on an RD-1C drive while I look for another solution, and build an RV-8. 

 

I=92= m still finding that I don=92t have enough fuel at anything above idle.  I was actually having to ru= n the cold start, and mixture above 12= :00 to have a mid range O2 reading at 3000-4000 rpm.  I set mode 3 today, and kept raisin= g the fuel until I got a mid range reading with the mixture at 12:00, and no cold start engaged.  This took 24 clicks!!!  S= omething just ain't right here... 

 

Bef= ore I started today, I checked the fuel pressure using a mighty-vac pump = to simulate changes to the MAP line.&nb= sp; The regulator changed pressure just like it=92s supposed to. <= /FONT>

 

I m= ade myself a note to check the fuel pressure calibration again the next t= ime I go to the hanger.  I = set this using a different sensor, that I believed to be the same as the = one that=92s installed on the regulator.  That should have gotten me very close, unless I accidental= ly used a sensor that was different (30 psi rather than 80 psi for exampl= e).  Once I had the fuel pr= essure =93calibrated=94 on the EM-2, I used that reading to set the adjus= table regulator for 42 psi.  Maybe my pressure "reads" 42 psi, but is really way low, li= ke 15 psi or so.

 

If = the fuel pressure is correct, I=92ll have to look into the injectors them= selves.  They=92re 400 cc/m= in MSD injectors, just like what was on the RV-3.  These were ordered just for this, and never used = on anything else, so maybe I was sent something smaller than 400 cc/min.<= SPAN style=3D"mso-spacerun: yes">  Worst case, I have a pair = of 525=92s that I can install if needed.  

 

Ah, the fun begins.  Pity I don't have time to fiddle wi= th this much now. The QB RV-8 will be here soon.  

 

Cheers,

Rusty (the weather geek)

 

PS-  The following link is the weather station in my back yard.  The = wind gust readings don't seem to be reporting correctly by the Weather Un= derground software, but otherwise, it's pretty cool.  My hope is tha= t we'll never get another hurricane, now that I'm set up to record the wi= nd conditions. 

 

http://www.weatherunderground.com/weatherstation/WXDailyHistory.asp?I= D=3DKFLNAVAR7

 

 

 
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