X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([204.127.217.102] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6326428 for flyrotary@lancaironline.net; Fri, 14 Jun 2013 21:07:34 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.102; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-144-179.mco.bellsouth.net[98.85.144.179]) by isp.att.net (frfwmhc02) with SMTP id <20130615010658H0200jacjue>; Sat, 15 Jun 2013 01:06:58 +0000 X-Originating-IP: [98.85.144.179] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Airworthiness Cert issued....followed by blown enigne Date: Fri, 14 Jun 2013 21:07:19 -0400 Message-ID: <578940BFCAF44958982BDAC98FF2B523@Desktop> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01CE6943.28A9B920" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac5pYMmT/1XTX+QGTUyV+d7EJGb8dAAA5cmA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0003_01CE6943.28A9B920 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit That has to be a big disappointment after the high of getting the airworthiness! :>( Hope you can get it back together soon. B2 _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of shipchief@aol.com Sent: Friday, June 14, 2013 8:39 PM To: Rotary motors in aircraft Subject: [FlyRotary] Airworthiness Cert issued....followed by blown enigne N89SE received it's Airworthiness Certificate June 13, 2013! Yay! So I put the covers on it an pulled it out of the hangar for a start up and taxi test. I have not run it this year while finishing the airframe. So I started it up, a bit behind the curve on the EC-2, chasing the mixture around etc, then settled in to a nice smooth high idle and taxi'd down to the far end of the runway where I ran it up to 4400 +RPM, checked the water & oil temps, (158 & 167) pulled out on the runway, and fed the power to it for a 2 or 3 second burst, to be pulled off to prevent flight. Well the thing started well enough, I pushed the throttle slowly to about 2/3, and as the plane gained some speed, the CATTO 68x74 prop unloaded a bit and the RPMs went up. The acceleration was profound for about 2 seconds followed by a POP! as or just before I started to pull the throttle back. Then came the grey smoke as I shut down the fuel pump and glided off the runway to the taxiway. A few guys came running to help. One asked 'How ya doin'?" Medium I replied. (I'm OK and nothing is burning). Yada Yada, The plane is back @ the hangar, and the oil leak (spew) is a cracked block at the last oil tap fitting on the top gallery, by the distributor pulse counter. (1986 type) Today I stripped the engine and pulled it off the airframe. Looking in the ports, all the tip seals move and are springy, but I think I detonated it, some damage is visible. Maybe in a previous tethered run (to 40" manifold press), and this time it let go. compression was down (prop pull method) I wonder if detonation under boost will crack the block (end irons)? ------=_NextPart_000_0003_01CE6943.28A9B920 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

That has to be a big disappointment = after the high of getting the airworthiness!  = :>(

Hope you can get it back together = soon.

 

B2

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of shipchief@aol.com
Sent: Friday, June 14, = 2013 8:39 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] = Airworthiness Cert issued....followed by blown enigne

 

N89SE received it's Airworthiness Certificate June 13, 2013! Yay!

So I put the covers on it an = pulled it out of the hangar for a start up and taxi = test.

I have not run it this year while finishing the airframe.

So I started it up, a bit behind = the curve on the EC-2, chasing the mixture around etc, then settled in to a = nice smooth high idle and taxi'd down to the far end of the runway where I = ran it up to 4400 +RPM, checked the water & oil temps, (158 & 167) pulled = out on the runway, and fed the power to it for a 2 or 3 second burst, to be = pulled off to prevent flight.

Well the thing started well = enough, I pushed the throttle slowly to about 2/3, and as the plane gained some = speed, the CATTO 68x74 prop unloaded a bit and the RPMs went up. The = acceleration was profound for about 2 seconds followed by a POP! as or just before I = started to pull the throttle back.

Then came the grey smoke as I shut = down the fuel pump and glided off the runway to the = taxiway.

A few guys came running to help. = One asked 'How ya doin'?" Medium I replied. (I'm OK and nothing is = burning). Yada Yada, The plane is back @ the hangar, and the oil leak (spew) is a = cracked block at the last oil tap fitting on the top gallery, by the distributor = pulse counter. (1986 type)

Today I stripped the engine and = pulled it off the airframe. Looking in the ports, all the tip seals move and are = springy, but I think I detonated it, some damage is visible. Maybe in a = previous tethered run (to 40" manifold press), and this time it let go. = compression was down (prop pull method) I wonder if detonation under boost will = crack the block (end irons)?

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