X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m24.mx.aol.com ([64.12.137.5] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 935444 for flyrotary@lancaironline.net; Fri, 06 May 2005 22:08:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.5; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-m24.mx.aol.com (mail_out_v38_r1.7.) id q.1ef.3b726708 (18707) for ; Fri, 6 May 2005 22:07:24 -0400 (EDT) From: Lehanover@aol.com Message-ID: <1ef.3b726708.2fad7cdc@aol.com> Date: Fri, 6 May 2005 22:07:24 EDT Subject: Re: [FlyRotary] To Lynn Hanover re: windage trays To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1115431644" X-Mailer: 9.0 SE for Windows sub 5012 -------------------------------1115431644 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 05/06/2005 06:44 Central Daylight Time, jerryhey@earthlink.net writes: Lynn, I would appreciate your advice. I am starting out to build wedge oil pans and wonder about the advisability of having a windage tray at all since they are not used stock 13-B or Renesis. The Renesis oil pan has a sub floor about .75 inches above the actual real bottom where oil can be trapped and presumably de-frothed. This might only be necessary because the pan is so shallow. I don't know and am looking forward to hearing your comments. The wedge oil pans would be much deeper toward rear and that is where I hope to place the pick up. Thanks, Jerry The primary reason for the windage tray in rotary racing with the internal pump, is to keep the entire oil supply from filling up the front cover and uncovering the pickup under hard braking. I have thought about the problem of keeping the pickup covered during climb and descent. How much of a climb angle would be tolerated before a problem develops. Riding down to Sun&Fun in the Bonanza I decided the angles involved were just too shallow to be a factor. That only leaves the defoaming as a benefit. We were racing without a tray for years before adding one. During a race (40 minutes) the oil pressure would drop from 85-90 PSI to 70 PSI. Some of that from oil temps going up, and some from oil foaming. We were putting it up into the front cover under braking and foaming the crap out of it with the front counter weight. This is with a stock pan with a quart of oil extra added. A conical shaped pan with the pickup at the inverted apex would seem close to the ideal if you maintain the internal pump. If you want the tray for defoaming I would suggest a flat plate with a 5/8" gap around the edges the full size of the pan. Or try the deep pan without any tray at all. If you don't use steep climb angles the oil will stay off of the front counter weight and little foaming will occur. Most foaming in the straight line is cooling oil from the rotors, and that exits at an angle before it gets to the pan and is just below the breather port. Lynn E. Hanover -------------------------------1115431644 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 05/06/2005 06:44 Central Daylight Time,=20 jerryhey@earthlink.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Lynn, I=20 would appreciate your advice. I am starting out to build
wedge o= il=20 pans and wonder about the advisability of having a windage
tray at all= =20 since they are not used stock 13-B or Renesis.   The
Renesis= oil=20 pan has a sub floor about .75 inches above the actual real
bottom wher= e=20 oil can be trapped and presumably de-frothed.   This
might o= nly=20 be necessary because the pan is so shallow. I don't know
and am=20 looking forward to hearing your comments.   The wedge oil pans=20
would be much deeper toward rear and that is where I hope to place the= =20
pick up. Thanks, Jerry

<= /DIV>

The primary reason for the windage tray in rotary racing with the inter= nal=20 pump, is to keep the entire oil supply from filling up the front cover=20 and uncovering the pickup under hard braking.

I have thought about the problem of keeping the pickup covered during c= limb=20 and descent.

How much of a climb angle would be tolerated before a problem develops.= =20 Riding down to Sun&Fun in the Bonanza I decided the angles involved were= =20 just too shallow to be a factor.

That only leaves the defoaming as a benefit. We were racing without a t= ray=20 for years before adding one. During a race (40 minutes) the oil pressure wou= ld=20 drop from 85-90 PSI to 70 PSI.

Some of that from oil temps going up, and some from oil foaming. We wer= e=20 putting it up into the front cover under braking and foaming the crap out of= it=20 with the front counter weight. This is with a stock pan with a quart of oil=20 extra added.

A conical shaped pan with the pickup at the inverted apex would seem cl= ose=20 to the ideal if you maintain the internal pump. If you want the tray for=20 defoaming I would suggest a flat plate with a 5/8" gap around the edges the=20= full=20 size of the pan. Or try the deep pan without any tray at all. If you don't u= se=20 steep climb angles the oil will stay off of the front counter weight an= d=20 little foaming will occur. Most foaming in the straight line is cooling= oil=20 from the rotors, and that exits at an angle before it gets to the pan and is= =20 just below the breather port.

Lynn E. Hanover

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