CAS?
Crank angle sensor. Generates the
signal for the ignition and the injectors.
Al
From: Rotary
motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard
Sent: Monday, July
20, 2009 18:19
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: WTF? Just
when I think everything is going perfect...
Yup,
spins with no sign of firing at all! It only spins easily by hand when
the plugs are out.. otherwise it is a one-compression-at-a-time kind of
exercise. Compression is normal.. I am well familiar with its
feel.
I am currently leaning toward a intermittent condition with my CAS wiring or
the bad gas/flooding issue. At least it has made me think harder about my
CAS as a single point failure and review the wiring.
Thanks for all the suggestions.
Dave Leonard
On Mon, Jul 20, 2009 at 11:59 AM, Charlie England <ceengland@bellsouth.net>
wrote:
David Leonard wrote:
Yesterday I went flying and tested out my new smoke
system... everything was perfect... somke is fun. Today I head out
to go formation flying.. nothing changed from my flight yesterday except
for adding fuel. But it won't start... I verify that I have fuel
pressure, fuel flow, injector function (in test mode), I have spark (in test
mode). Maybe it is flooded... I change the plugs, re-verify spark in
cranking mode (to eliminate issues with CAS), re-drain the fuel, verify
compression, re-verify fuel pressure and flow and injector funcion... but still
it just turns over without starting... Sigh
Anyone one know of a new component necessary other than fuel, spark, and
compression?
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
Details?
Spins with no sign of firing at all?
Spits & pops but no regular combustion events?
Any chance that the extra effort required to spin the engine by hand using the
prop through the reduction drive is hiding the fact that you have low
compression? The old RX-7 starting trick is fairly quick if you've
already got the cowl off. Pull a plug for each rotor & squirt in a little
ATF, reinsert the plug & try to crank. Lyn can probably recommend how much.
I never measured; I just dumped in as much as I could get in there while
fighting all the junk under the hood.
Charlie
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David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net