Reply-To: <steve@tsisp.com>
From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Some Taxi testing today. With oil leak.
Date: Sun, 13 Jun 2004 08:07:26 -0400
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Dave,
I'm using the stock turbo also and I haven't had any trouble with burning
the oil.  I didn't remember exactly how I fed mine, so when I was at the
airport yesterday, I pulled the cowling to take a look at it.   I used the
oil feed and drain lines that came with the engine.  The feed line was
welded to several other lines which I cut off, but the feed is about a 1/4"
line that feeds from the far top side.  With that long of a run, and given
that the drain tube is at least twice that size, that could very well be the
difference.  I also don't know how much oil pressure is present at the point
where it taps into the block.  There could possibly be a restriction there.

You may want to consider feeding the turbo from the original point on the
block, with AN4 hose, which should be closer to the original size.  I didn't
measure the outlet tube, but I'm pretty sure that it's larger than 3/8
(AN6).  Probably an AN8 would be a better size, unless you still have the
original drain.

Steve Brooks
Cozy MKIV
Turbo Rotary

 -----Original Message-----
From: 	Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]  On
Behalf Of DaveLeonard
Sent:	Saturday, June 12, 2004 1:44 AM
To:	Rotary motors in aircraft
Subject:	[FlyRotary] Some Taxi testing today. With oil leak.

I got the turbo back from the re-build shop today and did some high speed
taxi testing.  I even got the tail off the ground....  :-)

Cooling has not been an issue yet for easy ground testing.  Coolant and oil
both maxed at 70C (160F).

With Jim Maher's help I fixed my tach and found that I really am getting
more than 4500 RPM. To be specific, 4700 static at 29"MAP and 5300 at 33"
using Jim Mosur's old prop (similar to Tracy's old prop?)  And that's enough
to fly.

First flight was scheduled for Sat the 19th, but the turbo continues to spew
oil-smoke.  I am beginning to wonder if I am feeding it too much oil.  Rusty
says that is an internal restrictor, but looking in the oil inlet it looks
like it goes straight to an oil gallery.  I am feeding it with an AN-6 line.
I think I should try putting in a restrictor but I don't know how big to
make the opening.  Any input?

The oil return is also AN-6 (and bigger) and is all downhill to the pan.

Dave Leonard - Should have gone n.a. Should have gone n.a. Should have gone
n.a.  (not really)


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