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Date: Sat, 24 Nov 2007 12:27:19 -0700
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: hard starting
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Hi Steve,

If you install Tracy's injector disable circuit, the cold start
function is activated when one set of injectors is disabled.  The
result is that nearly full power is available.  If you have injector
problems, the engine performance will be better with the bad one(s)
disabled and cold start active.  Actual results will depend on what
injectors are used.

On my last flight disabling the primary injectors allowed me to land on
at the airport instead of 15 miles from the airport.  I would like to
tell you why I lost power and disabling the injectors restored power
but the poor landing at the airport resulted in no further engine runs
for testing, at least so far.  I would highly recommend installing the
injector disable circuit.

Bob W.


On Sat, 24 Nov 2007 13:14:45 -0500
"Steve Brooks" <cozy4pilot@gmail.com> wrote:

> John,
> I certainly don't disagree that measuring everything that you can, has an
> advantage.  Since I change my primary fuel filter each year during the
> conditional inspection, and the filter on my secondary pump, every other
> year, I haven't had an issue with a plugged filter.  But none the less, I
> would like to know what it is.  It's just a matter of priorities at the
> moment.
> 
> As far as a set of injectors not powered, I would certainly think that would
> cause a real performance issue on full power.
> 
> Steve Brooks
> 
> 
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of John Slade
> Sent: Saturday, November 24, 2007 9:39 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] hard starting
> 
> 
> Steve & Others,
> We all set up our engines in such a way that makes us feel secure, and
> no criticism intended, but I wanted to emphasize a couple of points for
> other readers....
> You mentioned that you don't switch the injectors separately. Switching
> off one set of injectors is a standard part of my preflight, and it has
> saved me from taking off with one circuit down. Also you said that you
> have no fuel pressure gauge on the panel. The fuel pressure reading on
> each pump is also part of my pre-flight. During the first few hours this
> helped me detect a blocked filter and a bad pump ground, and once helped
> me solve rough running in the air.
> 
> Extra switches and dials in the cockpit certainly increase pilot
> workload, but they sure help with problem diagnosis prior to and during
> flight.
> 
> John Slade
> Turbo Rotary, N96PM
> 96 hrs.
> 
> --
> Homepage:  http://www.flyrotary.com/
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> 
> 
> --
> Homepage:  http://www.flyrotary.com/
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-- 
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/cables/