Should  have been a jpeg.  I will send again.  Jerry

On Monday, May 9, 2005, at 07:01 PM, Dale Rogers wrote:

David,

   I saved to disk and opened in another browser window.
It was a line drawing - probably a .gif file.

From: "David Carter" <dcarter@datarecall.net>
Date: 2005/05/09 Mon PM 07:21:44 EDT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: To Lynn Hanover re: windage trays

Jerry, I noticed a "paper clip" on your e-mail so clicked it -
assumed it would be a .jpg picture of the pan.  When I clicked "save
attachment" I got warning "Trying to save a file with .dat
extension".    I didn't open or save it.  Any chance it is a virus
attachment?

David

----- Original Message -----
From: Jerry Hey
To: Rotary motors in aircraft
Sent: Monday, May 09, 2005 3:36 PM
Subject: [FlyRotary] Re: To Lynn Hanover re: windage trays



On Friday, May 6, 2005, at 09:07 PM, Lehanover@aol.com wrote:


  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


Thanks Lynn, I always learn a lot from your comments. Consider a
tractor config climbing vertically. If a windage tray covered the
back 1/3 of the pan, the pick up would probably remained covered and
little oil would be able to enter the front cover. As you said, at
more normal angles, it would not be a problem with or without the
tray. Those engines using Tracy's old pan plate and also the CC pan
plate are in the windage tray plus stock pan category. No problems
have ever been mentioned as far as I know.

Considering the Wedge pan, the way I built mine was to first make a
.125 thick aluminum windage tray that I used as a foundation to weld
up the pan. Thus the tray and pan became a single unit. The problem I
have experienced with this is that it is difficult when installing
the pan to feed it over the pick up tube. I think it would be better
after welding up the pan to completely cut out the center of the tray
leaving only the bolt flange very similar to the stock pan. A
separate windage tray, quite thin, could be added if desired.

The wedge oil pan is Paul Lamar's idea. For those unfamiliar with it,
it is intended to save space under the engine for the belly radiator
and plenum. I modified the pan shape to make it deepest at the pick
up tube. Perhaps I should have moved the pick up to the rear of he
pan instead. I would appreciate anyone's thoughts on this. BTW, the
wedge pan capacity as I built it is the same as the stock pan and the
full length wedge is a little larger. Jerry



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