From: "Russell Duffy" <13brv3@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: 2nd and 3rd run logs
Date: Mon, 14 Jul 2003 14:10:37 -0500
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In-Reply-To: <list-2474621@logan.com>

Greetings,

Thanks for all the comments, particularly the couple dozen that Ed left =
:-)
I just talked to Tracy, and here's the scoop.

The EC-2 is smart enough to know that you only have the primaries on at =
low
power, so it will turn on the secondaries if you turn off the primary
switch.  In other words, it will run with either set on, regardless of =
the
power setting (limited by fuel flow of one set of course).  Ed's =
explanation
of the secondaries delay in becoming effective, is probably the answer =
to
what is happening with mine.  Tracy said he had wondered about the =
effect of
putting the secondaries as far upstream as some folks have them. It's =
hard
to beat the atomization of those primaries in the block.

As for the thought of running all 4 injectors at once, the answer is =
pretty
much as Ed gave, to keep the injectors in a more controllable pulse =
width.
Still hard to believe that some of the RX-7 guys are running four 1600
injectors.  You'd only be using two to idle, but still, that's two =
1600's,
which is quite a bit more than four 460/550's.  They may be the peak and
hold type, which react faster than the saturation type that we need, so
maybe that's how they get away with it. =20

Bottom line is that I'm personally convinced that everything is working =
OK,
and just needs to be tuned, and I'd hate to do too much tuning until the
EM-2 gets here to make it easier.  The current plan is to move the =
airplane
to the hanger this weekend for final assembly.  That'll kill some time =
until
the EM-2 arrives. =20

Cheers,
Rusty
 =20