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From: "Steve Brooks" <cozy4pilot@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Second engine start
Date: Tue, 13 Feb 2007 09:23:31 -0500
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In-Reply-To: <list-1834860@logan.com>

Bill,
It takes very little air to make the engine rev like crazy.  On mine, the
throttle body had a bypass hole that let air around the butterfly.  It
looked like a slot in the aluminum body about 1/2" ahead of the butterfly.
Took me a while to find it, but not long to fill the chamber full of
silicone rubber to seal it off.

My throttle body was for a 5.0 liter Ford.  50mm I think, but not sure.

Steve Brooks

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Bill Bradburry
Sent: Tuesday, February 13, 2007 8:55 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Second engine start

OK, so after having discovered a loose engine to battery ground (which
prevented the starter from properly engaging) and an open oil line
(which made a mess! that will long live in infamy) our hero continues
his engine start saga....

The engine would not seem to fire after these incidents and my friend,
Simon Ramirez, said he didn't think the plugs were firing.  We put a
timing light on the plugs and sure enough, no spark!

We discovered that the 10A fuse on the ignition circuit providing power
to the igniters had blown.  After replacing the fuse, we were getting
flashes on the timing light!  I am concerned about why the fuse might
have blown, but so far, it is holding up.

Now the engine starts, but only seems to want to run at high revs.  It
also seems to run better when cold start is on.  I have not figured out
if this is just because the engine is cold, or if the condition is
chronic.  The temp outside at the time was in the low 70s.

Bob, hangar next door, told me that on occasion, there was flame coming
out of the exhaust!  Also people started showing up from all over the
airport....That 3" straight out exhaust note is a tad harsh!  especially
when the engine only wants to run at high revs!

I am ready to entertain suggestions about getting the engine to settle
down and do the Hummm and Purrr that I hear so many of you talking
about.  Right now it is more like ripping down a tin building with 15
chainsaws...{:>)

I am already proud of it!!

Bill B

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