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Subject: RE: [FlyRotary] Re: It runs!
Date: Thu, 21 Sep 2006 16:10:27 -0500
Message-ID: <5B59870CA143DD408BD6279374B74C8BC3F1F9@MAIL02.austin.utexas.edu>
In-Reply-To: <list-1413893@logan.com>
Thread-Topic: [FlyRotary] Re: It runs!
Thread-Index: AcbdvODc62mHq0pRTHWsV0bVqw70mQABTz4A
From: "Mark R Steitle" <mark.steitle@austin.utexas.edu>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Bob,
Since the EC-2 is set up to fire the leading and training plugs
together, maybe you should do another test, triggering off the trailing
plugs this time.  Sounds like you could have two wires crossed
somewhere. =20

Mark

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ed Anderson
Sent: Thursday, September 21, 2006 3:31 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: It runs!

Bob, I have no experience with the ignition on the 20B.  However, I
suspect=20
that some of the sparks you are seeing may be "waste sparks".  The 13B
uses=20
the "waste Spark" on the trailing plugs - the spark plug fires but it is

during the exhaust stroke - so has no effect, but does simply the
ignition=20
design.  So the sparks you are seeing that surprise you may be "waste=20
sparks".   OR you could have an ignition problem.

Ed


----- Original Message -----=20
From: "Bob Darrah" <RDarrah@austin.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, September 21, 2006 4:02 PM
Subject: [FlyRotary] Re: It runs!


> 20B It still runs, but not good.  Thanks for all your suggestions.
New=20
> gas with exactly measured oil made no difference.
>
> However, I put the timing light on each of the plug leads and was
really=20
> confused at what I saw.
>     #1, both lead and trail, 35 degrees before TDC  So good so far.
>     #2,   "        "      "      "    mostly 35 degrees Btdc, and an=20
> ocasanal 120 off from that
>     # 3                                 A lot of 240 degrees (about
where=20
> it should be) and a lot at 35 Btdc.
>
> After looking at that, I am surprised it runs at all.  And Tracy won't
be=20
> back till next week.  I am hopeing  that the extra length of my
embilical=20
> cord from the firewall to engine (Seawind) accounts for all of that,
but I=20
> have a hard time convincing myself that is so.
>
>
> Any other good ideas?????
>
> Bob Darrah
> Seawind/20B
> Near Austin, TX
>
> (But my spell checker said it was ok)
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>=20


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