Received-SPF: pass
 receiver=logan.com; client-ip=207.115.11.51; envelope-from=bbradburry@bellsouth.net
From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
References: <list-3683860@logan.com>
In-Reply-To: <list-3683860@logan.com>
Subject: RE: [FlyRotary] More Wire Separation?
Date: Tue, 16 Jun 2009 10:14:18 -0400
Message-ID: <6D4DA23B54D54C31A8B559ABE406FCB1@Desktop>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Thread-Index: AcnuVMU0ZeZODO0+SOeKFtYewnkwSQANlr+Q

Chris,
Do you have a drawing (sketch) of your wiring layout?  
You have the engine in the rear, the avionics in the front.  You mentioned
the forest of tabs being on the fire wall???  Where is your battery(s)?
You can have more than one forest of tabs location if you tie them together
with a wire big enough to carry the load from the auxiliary location.  I
brought all my power wires down one side and the sensor wires down the
other.  Seems to work ok so far.  (I haven't found any problem, doesn't
necessarily mean I don't have one. )
Ground loops are caused (If I understand Bob N.) by grounds having more than
one way to return to the battery.

Bill B 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Christopher Barber
Sent: Tuesday, June 16, 2009 3:33 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] More Wire Separation?

OK, I think I got separate wire runs for the needed runs to the EC2.  To
recap, from what I recall the injector wires should be segregated in a
bundle as well as the wires to the coils in a separate bundle.  I believe
the wires to the Crank Angle Sensor do NOT need to be bundled separately
since they are shielded.

My question is, when segregating the bundle for the injectors Tracy states
to segregate wires 17, 18, 35, 36 & 19 and 37 from the EC2.  For this, does
it just include these wires are should the POWER wires for the injectors
also be segregated? 

Also, the one wire that goes from the Rotor One Primary injector to the
EM2/engine monitor, should it be segregated along with the other ones since
int is connected to the injector?

Finally, as to wires 19 and 37.  In Tracy version of the wire diagram it
shows these two ground wires grounded on the airframe.  He also states that
these two wires should be as short as possible.  However, in the alternate
wire diagram provided in the manual (the one with the coil wire harness that
is in color online), and the diagram that is easier for me to wrap my mind
around, it shows these two wires ground to the engine.  To ground to the
engine makes it a pretty long wire run.  I cannot ground to the airframe in
a composite.  IS IT ACCEPTABLE to ground these two wires to my ground
"forest" (the one from B&C per AeroElectric/Bob Knuckles) on my firewall.
This would allow for these two wires to be quite short....from about four
feet to about 10 inches.

Thanks for your patience guys.  Doing this stuff now is much easier on the
third or forth attempt <g>.....I gotta do something while waiting for my new
"Minstral type" injectors to arrive <g>

All the best,

Chris

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:
http://mail.lancaironline.net:81/lists/flyrotary/List.html