Return-Path: Received: from [65.54.168.111] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 602310 for flyrotary@lancaironline.net; Mon, 10 Jan 2005 15:51:19 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.111; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 10 Jan 2005 12:50:02 -0800 Message-ID: Received: from 65.54.98.12 by BAY3-DAV7.phx.gbl with DAV; Mon, 10 Jan 2005 20:49:09 +0000 X-Originating-IP: [65.54.98.12] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Metering Pump Blockoff Date: Mon, 10 Jan 2005 15:49:06 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_014B_01C4F72B.EA64B760" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Mon, 10 Jan 2005 15:49:06 -0500 X-OriginalArrivalTime: 10 Jan 2005 20:50:02.0613 (UTC) FILETIME=[F4E4C250:01C4F755] This is a multi-part message in MIME format. ------=_NextPart_000_014B_01C4F72B.EA64B760 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable FWIW, I flew for about 3 years with the oil injection pump shaft = removed and oil passage to it NOT blocked. I assumed this was a 3/16 = open hole that the oil pressure was bleeding from. I later blocked it = and was surprised that it made little difference to oil pressure at any = rpm. Bruce T. later told me that Mazda stakes a small orifice plug down = in the passage way to restrict the oil flow. I never saw it (didn't = look) but my oil pressure results would seem to support that story. = This was a 1988 6 port engine. Oil flow through this passage does not = lubricate the oil pump chain so that is not a factor. Tracy Crook ----- Original Message -----=20 From: Bulent Aliev=20 To: Rotary motors in aircraft=20 Sent: Sunday, January 09, 2005 8:30 PM Subject: [FlyRotary] Re: Metering Pump Blockoff On 1/9/05 3:55 PM, "Fred Osborn" = > wrote: >> << Hi Lynn, >> You said that if the shaft for the oil metering pump is removed, = the >> pressure oil feed gallery has to be plugged. To do that we must >> remove the >> front housing. How about if we still have the shaft, can we just >> pushed in >> from the outside (with gear removed) through the shaft opening? Or >> just an >> aluminum rod with tight fit to fill the shaft hole? >> I don't have an extra front housing to look at, so I'm just = guessing. >> Buly >=20 >=20 > Buly, >=20 > Quite some time ago there was a lengthy discussion on this subject = at the > other web site. Yes, plugging is necessary. If you look at the front = cover > front surface you will see an oil passage leading down and then = across the > front to just below the outside bump for the shaft. This feeds > pressurized oil > into the necked down portion at the center of the metering pump = shaft. > If this > oil passage is not blocked by a dowel per Tracy's book then you must = block > both the inner and outer ends of the shaft opening. >=20 > Much of the discussion centered on whether the shaft opening should = be > fully > blocked since the hole leading up to shaft from the oil passage > continues up to > the inner surface of the front cover. There it is partially blocked = by a > roll pin. > Some felt that this was intended to provide some "spray" oiling for = the oil > pump chain. If so, then the best course would be to block the hole = with the > metering pump shaft. You would have to make certain that the shaft = can't > slide > back into the sump. If the "spray lube" is not correct then a rod > filling the shaft > hole end to end would be just fine. Perhaps Tracy could tell us if = he > has had > any problems from just blocking the passage. >=20 > Fred Osborn >=20 Thanks Fred. Since I inherited a very nice South Bend lathe, now I can = make an aluminum rod to fit tight the whole length of the shaft hole. I = have also plugged the small about 1/8 hole on the outside beside the shaft = opening. I run the engine today and the oil pressure was fine. But to make sure = I'll do the shaft "thing" too. Bulent >> Homepage: http://www.flyrotary.com/ >> Archive: = http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_014B_01C4F72B.EA64B760 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
FWIW,  I flew for about 3 years with the oil injection pump = shaft=20 removed and oil passage to it NOT blocked.  I assumed this was a = 3/16 open=20 hole that the oil pressure was bleeding from.  I later blocked it = and was=20 surprised that it made little difference to oil pressure at any = rpm.  Bruce=20 T. later told me that Mazda stakes a small orifice plug down in the = passage way=20 to restrict the oil flow.  I never saw it (didn't look) but my oil = pressure=20 results would seem to support that story.  This was a 1988 6 port=20 engine.  Oil flow through this passage does not lubricate the oil = pump=20 chain so that is not a factor.
 
Tracy Crook
----- Original Message -----
From: Bulent Aliev
To: Rotary motors in = aircraft
Sent: Sunday, January 09, 2005 = 8:30=20 PM
Subject: [FlyRotary] Re: = Metering Pump=20 Blockoff

On 1/9/05 3:55 PM, "Fred Osborn" <fosborn@infowest.com>=20 wrote:

>>  << Hi Lynn,
>>  You = said that=20 if the shaft for the oil metering pump is removed, = the
>> =20 pressure oil feed gallery has to be plugged. To do that we = must
>>=20 remove the
>>  front housing. How about if we still have = the=20 shaft, can we just
>> pushed in
>>  from the = outside=20 (with gear removed) through the shaft opening? Or
>> just=20 an
>>  aluminum rod with tight fit to fill the shaft=20 hole?
>>  I don't have an extra front housing to look = at, so I'm=20 just guessing.
>>  Buly
>
>
> = Buly,
>=20
> Quite some time ago there was a lengthy discussion on this = subject at=20 the
> other web site. Yes, plugging is necessary. If you look at = the=20 front cover
> front surface you will see an oil passage leading = down and=20 then across the
> front to just below the outside bump for the = shaft.=20 This feeds
> pressurized oil
> into the necked down = portion at the=20 center of the metering pump shaft.
> If this
> oil passage = is not=20 blocked by a dowel per Tracy's book then you must block
> both = the inner=20 and outer ends of the shaft opening.
>
> Much of the = discussion=20 centered on whether the shaft opening should be
> fully
> = blocked=20 since the hole leading up to shaft from the oil passage
> = continues up=20 to
> the inner surface of the front cover. There it is partially = blocked=20 by a
> roll pin.
> Some felt that this was intended to = provide=20 some "spray" oiling for the oil
> pump chain. If so, then the = best=20 course would be to block the hole with the
> metering pump = shaft. You=20 would have to make certain that the shaft can't
> slide
> = back=20 into the sump. If the "spray lube" is not correct then a rod
> = filling=20 the shaft
> hole end to end would be just fine. Perhaps Tracy = could tell=20 us if he
> has had
> any problems from just blocking the=20 passage.
>
> Fred Osborn
>

Thanks Fred. = Since I=20 inherited a very nice South Bend lathe, now I can make
an aluminum = rod to=20 fit tight the whole length of the shaft hole. I have also
plugged = the small=20 about 1/8 hole on the outside beside the shaft opening.
I run the = engine=20 today and the oil pressure was fine. But to make sure I'll
do the = shaft=20 "thing" too.
Bulent


>>  Homepage:  http://www.flyrotary.com/
>&= gt; =20 Archive:   http://lancai= ronline.net/lists/flyrotary/List.html
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