X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp810.mail.sc5.yahoo.com ([66.163.170.80] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with SMTP id 966936 for flyrotary@lancaironline.net; Sat, 28 May 2005 22:44:19 -0400 Received-SPF: none receiver=logan.com; client-ip=66.163.170.80; envelope-from=downing.j@sbcglobal.net Received: from unknown (HELO downing) (downing.j@sbcglobal.net@69.209.115.227 with login) by smtp810.mail.sc5.yahoo.com with SMTP; 29 May 2005 02:43:34 -0000 Message-ID: <003c01c563f9$d2f7f840$4001a8c0@jsbcglobal..gateway.2wire.net> From: "John Downing" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] smooooth, and no leaks :-) Date: Sat, 28 May 2005 22:55:07 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0039_01C563D8.4B601140" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0039_01C563D8.4B601140 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty; Looks great, but you had me worried for a moment there = before you converted the oz's to grams. It looked like more than a lb. = of lead. JohnD=20 ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Saturday, May 28, 2005 9:11 PM Subject: [FlyRotary] smooooth, and no leaks :-) Greetings, I'll be lazy and post the log entry for today. It was a good day, = give or take two ugly landings. =20 Cheers, Rusty (daily log font enlarged for the visually challenged) 5-28-05 .5 hours / 48.2 total =20 I used my new ACES 2015 balancer today to balance the prop. Ended up = adding 19.3 ounces of weight at one spot. I used 1900 rpm on the prop, = which works out to be about 5300 on the engine. This seemed to be about = the worst spot, with 6000 being just a bit lower in vibration. The = instructions say to use a low cruise, and this is probably as low a = cruise as I'll ever be at. =20 =20 AT 1900 prop rpm, the initial vibration reading was .45 ips, and the = solution was to add 18.5 gms to one spot. I used the split weight = function to add two smaller amounts of weight to the existing spinner = screw holes. This was great, and gave a reading of .06 ips. I then = used the balancer to calculate the diff in weight for the permanent spot = inside the flange of the spinner, and it came up with 19.14 gms. I = ended up using 19.3 gms, since the longer screw would be more inboard, = and have less effect, and also because I'd be drilling a hole, and = removing a little weight. This was perfecto, and the final run was also = at .06 ips.=20 =20 While I had the analyzer out, I did a vibration spectrum survey at the = front hub, and at the front housing on the engine. At the front hub, = the only peak was the prop itself. On the front housing, there were no = prominent peaks up to 10,000 hz. To me, this means there isn't any = other significant vibration such as rotor imbalance, flywheel, = counterweights, etc. =20 =20 Took the plane for a quick spin around the area, and it's like night = and day. No more compass spinning like it's possessed from the = vibration at full throttle. Just dandy, and much better for my evap = cores and such. I still hate the fuel transfer pump though. =20 =20 I can also officially report that my oil leak is gone, gone, GONE! = Temps are awesome, but still could close the oil scoop some. I climbed = from 80 ft to 5000 feet at 100 mph, with a ground OAT of 88 degrees. = Max oil temp was 186, and coolant was 215. The cowl baffle keeps them = in the 160's for oil, and 180's for water in cruise. Running out of = excuses not to fly someplace. =20 ------=_NextPart_000_0039_01C563D8.4B601140 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty;  Looks great, but you had = me worried=20 for a moment there before you converted the oz's to grams.  It = looked like=20 more than a lb. of lead.  JohnD 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Saturday, May 28, 2005 = 9:11=20 PM
Subject: [FlyRotary] smooooth, = and no=20 leaks :-)

Greetings,
 
I'll be lazy = and post the=20 log entry for today.  It was a good day, give or take two ugly=20 landings. 
 
Cheers,
Rusty (daily = log font=20 enlarged for the visually challenged)
 
 
 

5-28-05  = .5=20 hours  /  48.2 total

 

I used my new ACES = 2015=20 balancer today to balance the prop. =20 Ended up adding 19.3 ounces of weight at one spot.  I used 1900 rpm on the prop, = which=20 works out to be about 5300 on the engine.  This seemed to be about the = worst=20 spot, with 6000 being just a bit lower in vibration.  The instructions say to use = a low=20 cruise, and this is probably as low a cruise as I=92ll ever be = at. 

 

AT 1900 prop rpm, = the initial=20 vibration reading was .45 ips, and the solution was to add 18.5 gms to = one=20 spot.  I used the split = weight=20 function to add two smaller amounts of weight to the existing spinner = screw=20 holes.  This was great, = and gave a=20 reading of .06 ips.  I = then used=20 the balancer to calculate the diff in weight for the permanent spot = inside the=20 flange of the spinner, and it came up with 19.14 gms.  I ended up using 19.3 gms, = since the=20 longer screw would be more inboard, and have less effect, and also = because I=92d=20 be drilling a hole, and removing a little weight.  This was perfecto, and the = final run=20 was also at .06 ips.

 

While I had the = analyzer out, I=20 did a vibration spectrum survey at the front hub, and at the front = housing on=20 the engine.  At the = front hub, the=20 only peak was the prop itself.  = On=20 the front housing, there were no prominent peaks up to 10,000 hz.  To me, this means there = isn=92t any=20 other significant vibration such as rotor imbalance, flywheel, = counterweights,=20 etc. 

 

Took the plane for = a quick spin=20 around the area, and it=92s like night and day.  No more compass spinning = like it=92s=20 possessed from the vibration at full throttle.  Just dandy, and much better = for my=20 evap cores and such.   =  I still hate the fuel = transfer pump=20 though. 

 

I can also = officially report=20 that my oil leak is gone, gone, GONE! =20 Temps are awesome, but still could close the oil scoop = some.  I climbed from 80 ft to 5000 = feet at=20 100 mph, with a ground OAT of 88 degrees.  Max oil temp was 186, and = coolant was=20 215.  The cowl baffle = keeps them=20 in the 160=92s for oil, and 180=92s for =20 water in cruise.  Running=20 out of excuses not to fly someplace.  =20

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