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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1834860@logan.com>
Subject: Re: [FlyRotary] Second engine start
Date: Tue, 13 Feb 2007 10:17:16 -0500
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Glad to hear, you got it "almost" purring, Bill.

I'm beating an old drum here, but would feel remiss if I didn't beat it one 
more time.  I would not ever use fuses for any installation critical system 
such as fuel or  ignition.  Can use them for anything else (and I do use 
fuses).  The reason is exactly what you discovered - a blown fuse - cause by 
( at the moment )an unknown - but apparently transitory problem (since it is 
not continuing to blow).  That's the key (transitory)  - if a transitory 
fault happens and the fuse blows on a engine critical system - you are out 
of luck unless already on the ground while a resetting of a CB may regain 
function.   While its true a CB reset may not save you (if the fault is 
persistent) - but then again it may.

In my  2000+ hours of flying in military aircraft, I have had CB pop and 
regained the system by simply resetting the CB.  Certainly does not work 
when a persistent problem exists - but, it can save your bacon if the 
problem is transitory.

There, my 0.02 and I feel better.{:>)

Ed


 ----- Original Message ----- 
From: "Bill Bradburry" <bbradburry@allvantage.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, February 13, 2007 8:55 AM
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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