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X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 920414 for flyrotary@lancaironline.net; Sat, 30 Apr 2005 12:18:02 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf22aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050430161716.MAXC2058.imf22aec.mail.bellsouth.net@rd> for ; Sat, 30 Apr 2005 12:17:16 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: RV climb speeds was Re: warp drive 3-blade prop Date: Sat, 30 Apr 2005 11:17:15 -0500 Message-ID: <000001c54da0$13389ab0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C54D76.2A6292B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C54D76.2A6292B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi! Rusty I keep on reading about your trials & tribulations regarding your = engine, what was the original problem? Georges B. Hi Georges, In the previous configuration, I used an evaporator core for an oil = cooler. This turned out to be a mistake, but as Ed always says, make new = mistakes, not old ones. The best theory is that the positive displacement oil = pump produces some punishing pressure pulses, and over time, it split the = core at one of the seams. Actually, it split two of them. =20 The first was damaged in shipping originally, but worked fine for about = 30 hours of mostly ground running. It then started to leak at one of the = seams, and I replaced it with an undamaged core. That core did fine for about = 10 flight hours, until I was on my way home from the first cross country in = the plane. =20 The core split open at about 6000 feet, and nearly full throttle. Lot's = of smoke, oil, and probably some flames that I didn't see on the exhaust. = The result was a dead stick landing at a Navy helicopter training field on a Sunday. There wasn't any damage as a result of fire, or landing, but = the engine was trashed from running without oil for a handful of seconds at = high throttle. =20 About $2500, and 4 months later, here I am, but with a real oil cooler = :-) Cheers, Rusty (watching it rain, and hoping the water doesn't rise too much = again) ------=_NextPart_000_0001_01C54D76.2A6292B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Hi! Rusty
I keep on reading about your trials = &=20 tribulations regarding your engine, what was the original = problem?
Georges=20 B.

Hi Georges,

In the previous configuration, I = used an=20 evaporator core for an oil cooler. This turned out to be a = mistake, but as=20 Ed always says, make new mistakes, not old ones. The best theory = is that=20 the positive displacement oil pump produces some punishing pressure = pulses, and=20 over time, it split the core at one of the seams. Actually, it = split two=20 of them.

The first was damaged in shipping = originally,=20 but worked fine for about 30 hours of mostly ground running. It then = started to=20 leak at one of the seams, and I replaced it with an undamaged = core. That=20 core did fine for about 10 flight hours, until I was on my way home from = the=20 first cross country in the plane.

The core split open at about 6000 = feet, and=20 nearly full throttle. Lot's of smoke, oil, and probably some = flames that I=20 didn't see on the exhaust. The result was a dead stick landing at = a Navy=20 helicopter training field on a Sunday. There wasn't any damage as = a result=20 of fire, or landing, but the engine was trashed from running without oil = for a=20 handful of seconds at high throttle.

About $2500, and 4 months later, = here I am,=20 but with a real oil cooler :-)

Cheers,

Rusty (watching it rain, and = hoping the=20 water doesn't rise too much again)

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