X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail12.syd.optusnet.com.au ([211.29.132.193] verified) by logan.com (CommuniGate Pro SMTP 5.2.1) with ESMTPS id 2837902 for flyrotary@lancaironline.net; Tue, 08 Apr 2008 18:05:51 -0400 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.193; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-145-80.dsl.nsw.optusnet.com.au [220.236.145.80]) by mail12.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m38M52VN005246 for ; Wed, 9 Apr 2008 08:05:03 +1000 Message-ID: <000d01c899c4$9bf00fa0$5091ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Oil flow rate Date: Wed, 9 Apr 2008 08:05:05 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C89A18.6BA2C0A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C89A18.6BA2C0A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Lynn, I guess your saying that the oil cooling jet hole will reduce the = total oil pressure, so that's lost either way - didn't think of it in = those terms, but your absolutely right! Although I must mention on the single rotor- I don't have a centre = iron, but I understand what your saying. George ( down under) The second option sounds better to me. Perhaps three 1.5MM holes = directly behind the combustion chamber through the oiling groove. The = oil lost to cooling is lost to the bearing no matter what. You could drill three different sizes of hole, each set 120 degrees = apart. Drill three holes in the bearing groove, slightly bigger than the = largest cooling oil hole in the rotor. Grind off the alignment tab on = the bearing.=20 Press the bearing in with the smallest set of spray holes lined up = with the large holes in the bearing. Test the engine with a temp sender in the drainback gallery in the = center iron where all of the cooling oil returns to the pan. Run the = engine hard with each set of holes lined up in turn, and compare the = data.=20 Since you are feeding one less rotor bearing with the stock pump, I = doubt that you will have any problem holding 80 to 100 PSI at speed. The = engine will / may have poor oil pressure at low idle speeds, but this is = not a problem as the bearing area is adequate for two engines. If you = can get an indication of oil pressure, that is enough. Lynn E. Hanover In a message dated 4/7/2008 3:05:28 PM Pacific Daylight Time, = lendich@optusnet.com.au writes: The second option, and I'm not so sure it's a good idea, is to use = the bearing lube hole and drill a 2mm hole in the rotor bearing through = to the rotor cavity. Apparently this works well for delivering oil to = cool the rotor, my concern is it starving the rotor bearing of it much = needed lubricant? George ( down under)=20 -------------------------------------------------------------------------= ----- Planning your summer road trip? Check out AOL Travel Guides. -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG.=20 Version: 7.5.519 / Virus Database: 269.22.8/1362 - Release Date: = 6/04/2008 11:12 AM ------=_NextPart_000_000A_01C89A18.6BA2C0A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Lynn,

I guess your saying that the oil = cooling jet=20 hole will reduce the total oil pressure, so that's lost either way -=20 didn't think of it in those terms, but your absolutely = right!

Although I must mention on the single = rotor- I=20 don't have a centre iron, but I understand what your = saying.

George ( down under)

The second option sounds better to me. Perhaps three 1.5MM holes = directly=20 behind the combustion chamber through the oiling groove. The oil lost = to=20 cooling is lost to the bearing no matter what.

You could drill three different sizes of hole, each set 120 = degrees=20 apart. Drill three holes in the bearing groove, slightly bigger than = the=20 largest cooling oil hole in the rotor. Grind off the alignment tab on = the=20 bearing.

Press the bearing in with the smallest set of spray holes lined = up with=20 the large holes in the bearing.

Test the engine with a temp sender in the drainback gallery in = the center=20 iron where all of the cooling oil returns to the pan. Run the engine = hard with=20 each set of holes lined up in turn, and compare the data.

Since you are feeding one less rotor bearing with the stock pump, = I doubt=20 that you will have any problem holding 80 to 100 PSI at speed. The = engine will=20 / may have poor oil pressure at low idle speeds, but this is not a = problem as=20 the bearing area is adequate for two engines. If you can get an = indication of=20 oil pressure, that is enough.

Lynn E. Hanover

In a message dated 4/7/2008 3:05:28 PM Pacific Daylight Time,=20 lendich@optusnet.com.au writes:

The second option, and I'm not so = sure it's a=20 good idea, is to use the bearing lube hole and drill a 2mm hole in = the rotor=20 bearing through to the rotor cavity. Apparently this works well for=20 delivering oil to cool the rotor, my concern is it starving the = rotor=20 bearing of it much needed lubricant?

George ( down=20 under)

Planning your summer road trip? Check out AOL Travel Guides.

No virus found in this incoming message.
Checked by AVG.=20
Version: 7.5.519 / Virus Database: 269.22.8/1362 - Release Date: = 6/04/2008=20 11:12 AM
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