John,
On the rich issue, I think that I read somewhere that the stock Mazda ran
about 35 lbs.  I also read somewhere (Tracey's EC-2 instructions or web
site) to set the fuel pressure at 40 lbs.  Also your regulator should have a
manifold pressure input to it, so that it will adjust the pressure
automatically 1 lb for each inch of manifold pressure.

My .02 - just not sure of my sources.

Steve Brooks
Cozy MKIV - Flying soon
13BT

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of John Slade
Sent: Thursday, May 06, 2004 2:42 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: surging


Turbo Rotary Cozy IV N96PM flew again this morning.
I think this is a first! Nothing went wrong, and I didn't break anything.
:D

I flew for about 0.8hrs. Ambient was about 75. Coolant and oil never went
above 180, and were down to 140 during decent, so cooling just doesn't seem
to be a problem.

A write up (with pictures this time) is at
http://canardaviation.com/cozy/chap29.htm#flight5
for your enjoyment.

I still have a rich mixture problem. Its starting much easier now, and
running smooth, but still way too rich. Today I had the mixture knob against
the stop (lean) for the entire flight. Once I tried richening it a touch,
and the engine faultered immediately. The mode 3 (on the ground) adjustments
dont seem to make any difference. I wonder if I need smaller injectors or
lower fuel pressure (currently running about 45psi).

Thoughts anyone?
John Slade


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