Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Tue, 13 Jan 2004 19:24:51 -0500 Message-ID: X-Original-Return-Path: Received: from grebe.mail.pas.earthlink.net ([207.217.120.46] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2930341 for flyrotary@lancaironline.net; Tue, 13 Jan 2004 09:38:10 -0500 Received: from user-33qt4q7.dialup.mindspring.com ([199.174.147.71] helo=Carol) by grebe.mail.pas.earthlink.net with smtp (Exim 3.33 #1) id 1AgPfI-0005na-00 for flyrotary@lancaironline.net; Tue, 13 Jan 2004 06:37:08 -0800 X-Original-Message-ID: <002801c3d9e2$b4715b70$0000a398@Carol> From: "sqpilot@earthlink" X-Original-To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Success X-Original-Date: Tue, 13 Jan 2004 08:36:59 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01C3D9B0.68C4B820" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2720.3000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2727.1300 This is a multi-part message in MIME format. ------=_NextPart_000_0025_01C3D9B0.68C4B820 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, Mark.....possibly our engines are different. The existing press-fit = hole in my engine was already 17mm, or .690 inches. The required drill = for a 3/8 NPT is 37/64ths, or .570. The .690 hole is already bigger = than the required .570 tap drill size for a 3/8 NPT tap. My engine is a = 1989 turbo model. Hope this is useful to someone? Paul Conner ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Tuesday, January 13, 2004 7:34 AM Subject: [FlyRotary] Re: Success Paul,=20 I was able to tap mine to 3/8 NPT which left adequate wall thickness. = Mark S. At 09:54 AM 1/12/2004 -0500, you wrote: Hi, Finn....By the time I drilled and tapped the hole for 1/2 NPT, = the remaining wall would be so thin, I was afraid it would break during = the tapping operation. The housing is cast iron, and a pipe tap is = tapered, so it tries to expand the hole while tapping. Not a good = situation when you have thin walls, expecially if those thin walls are = cast iron. Take care. Paul Conner=20 ----- Original Message -----=20 From: Finn Lassen=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 11, 2004 11:11 PM=20 Subject: [FlyRotary] Re: Success I curious as to why you didn't simply thread the housing with 1/2" = NPT and used the fitting unaltered. Finn sqpilot@earthlink wrote: The second item I had success with was the 5/8" heater = nipple that is a press fit into the engine, underneath the oil filter. = Mine was missing from my engine. I tried to find a new one, with no = success. Finally, Mazdatrix sent a used one, but when I put a micrometer = to it, it was considerably out of round (probably caused during removal = from the casting).=20 =20 I found at our local CarQuest auto parts store, a steel = 5/8" hose barb to a 1/2" NPT male fitting. I just put it in a lathe, and = turned the 1/2" NPT threaded area down to 17 mm, or .160 inches. In the = picture, you will see the longer original piece, as well as the new, = slightly shorter nipple. ------=_NextPart_000_0025_01C3D9B0.68C4B820 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi, Mark.....possibly our engines are=20 different. The existing press-fit hole in my engine was already = 17mm, or=20 .690 inches. The required drill for a 3/8 NPT is 37/64ths, or=20 .570. The .690 hole is already bigger than the required .570 = tap=20 drill size for a 3/8 NPT tap. My engine is a 1989 turbo model. = Hope this=20 is useful to someone? Paul Conner

----- Original Message -----
From:=20 Mark=20 Steitle
To: Rotary motors in = aircraft

Sent: Tuesday, January 13, 2004 = 7:34=20 AM

Subject: [FlyRotary] Re: = Success

Paul,
I was able to tap mine to 3/8 NPT which left = adequate=20 wall thickness.

Mark S.

At 09:54 AM 1/12/2004 = -0500,=20 you wrote:

Hi,=20 Finn....By the time I drilled and tapped the hole for 1/2 NPT, the = remaining=20 wall would be so thin, I was afraid it would break during the = tapping=20 operation. The housing is cast iron, and a pipe tap is = tapered, so it=20 tries to expand the hole while tapping. Not a good situation when = you have=20 thin walls, expecially if those thin walls are cast iron. Take = care.=20 Paul Conner=20

----- Original Message -----=20
From: Finn = Lassen=20
To: Rotary = motors in=20 aircraft=20
Sent: Sunday, January 11, 2004 11:11 PM=20
Subject: [FlyRotary] Re: Success

I curious as to why you didn't simply thread the housing with = 1/2" NPT=20 and used the fitting unaltered.

Finn

sqpilot@earthlink = wrote:

The second item I had success with = was the=20 5/8" heater nipple that is a press fit into the engine, = underneath the=20 oil filter. Mine was missing from my engine. I tried to = find a new=20 one, with no success. Finally, Mazdatrix sent a used one, but = when I put=20 a micrometer to it, it was considerably out of round (probably = caused=20 during removal from the casting).
=20
I found at our local = CarQuest=20 auto parts store, a steel 5/8" hose barb to a 1/2" NPT male = fitting. I=20 just put it in a lathe, and turned the 1/2" NPT threaded area = down to 17=20 mm, or .160 inches. In the picture, you will see the longer = original=20 piece, as well as the new, slightly shorter=20 = nipple.

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