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Message-ID: <3F8AC8AA0F70466BA4297973E8D85339@JohnPC>
From: <downing.j@sbcglobal.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-5522406@logan.com>
In-Reply-To: <list-5522406@logan.com>
Subject: Re: [FlyRotary] At least I didn't....
Date: Fri, 4 May 2012 08:01:25 -0400
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Ernest, be easy on yourself, it's not us mortals, it's Murphy.  JohnD
----- Original Message ----- 
From: "Ernest Christley" <echristley@att.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, May 04, 2012 7:54 AM
Subject: [FlyRotary] At least I didn't....


> Cause an interplanetary probe to crash or an airliner to run out of fuel.
>
> You know, one of those stupid mistake caused by incorrect conversions. My 
> conversion trip-up was converting "front rotor" from the car to the 
> airplane (and ignoring the "F" and "R" that I stamped into the rotor 
> housings).
>
> I had fuel.  I had air.  I had spark.  It was just that the spark was 
> going to the wrong rotor.  And I used a timing light to verify that I was 
> getting the spark.  Except I took the timing from the wrong rotor.  I even 
> searched this group and verified that I had the EDIS-4 coils wired 
> correctly.  Connectors 1 and 4 go to the front rotor.  Given that the 
> front rotor is the one in the front on the airplane, not the car.
>
> Doh!!
>
> Once I switched the plug wires around and cleared the engine (turned it a 
> bit with the fuel pumps and injectors off), the engine kicked off in two 
> blades. Someone has GOT to develop a cure for stupid, or I'm doomed.
>
> Word to the wise.  You've verified fuel, air, and spark, and compression. 
> The engine's spinning with the starter at around 250rpm, but it just won't 
> kick off.  Every few turns, though, it is like something blocks the engine 
> from turning and it stall for a split second.  Check your spark plug 
> wiring.
>
> Good news:
> - FIRST TAXI !!!  It was only about 3ft, but it is the first time in this 
> ten year project that I've had something to move under its own power!!
>
> - The manifold modification is a success.  I had the secondary injectors 
> spraying backwards, away from the runner, under the theory that it would 
> help the fuel vaporize better.  Wrong.  It just puddled in the manifold. 
> A little more fiberglass work, and both sets are spraying with the airflow 
> now.  I cut power to the fuel pump and the engine immediately cuts out. 
> It used to slowly choke down as it was sucking some of the puddled fuel 
> out of the manifold.
>
> - I don't seem to have damaged anything with the backwards plug wires.
>
> - I've got to rework my tune.  Yes, this is a good thing.  The aggressive 
> prop is loading the engine, combined with the fuel actually getting burned 
> AS it is injected and not after it has pooled a while, have combined to 
> throw off the current tune.  Fortunately, this isn't very hard with a 
> running engine.
>
> -FIRST TAXI !!  I'm juiced.  You guys that are flying better watch your 
> six.  I'm a comin'.
>
> --
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