From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Fwd: [FlyRotary] Re: Engine miss
Date: Mon, 13 Jan 2020 08:45:16 +0800
References: <list-13385830@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-13385830@logan.com>
Message-Id: <009A079C-FFAA-4B05-8DB7-D20BA6D664CB@gmail.com>

Thanks so much Bobby. Much appreciated.

Steve

> On 13 Jan 2020, at 8:24 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Steve,
>=20
> I was at the hanger today and located my old EC2. I=E2=80=99ll send =
pictures to your email.=20
>=20
> Bobby=20
>=20
> Sent from my iPad
>=20
>> On Jan 12, 2020, at 4:37 PM, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>>=20
>> =EF=BB=BFThanks Bobby.
>> But how big are the pins you guys use he US?!!!
>>=20
>> Steve
>>=20
>>=20
>>=20
>>=20
>>=20
>> > On 12 Jan 2020, at 11:59 pm, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>> >=20
>> > Steve,
>> >=20
>> > The capacitors Tracy added were across two legs of the map sensor =
on the sensor and not much bigger than a pin head. This was on the EC2 I =
flew for the first 200 hours. I don=E2=80=99t have pictures.=20
>> >=20
>> > Bobby=20
>> >=20
>> > Sent from my iPad
>> >=20
>> >> On Jan 12, 2020, at 3:40 AM, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>> >>=20
>> >> =EF=BB=BFHi Bobby
>> >>=20
>> >> Today we did some tests on the system.
>> >> Replacing the antenna with a dummy load revealed as expected no =
symptoms in either the EFIS and EC2
>> >> The antenna analyser revealed a reasonable antenna with a VSWR of =
~1:1.25
>> >>=20
>> >> Both experts on site today recommended adding ferrites to wiring =
entering the ADHARS and EC2
>> >> I will pull the EC2 and check for the caps on the MAP sensors, but =
from a photo I have of the component side of the board they do not =
appear.
>> >> On which side did Tracy add the caps?
>> >> Hoping these fix the problem, and if not will shield the temp =
input the A.
>> >>=20
>> >> Thanks Bobby.
>> >>=20
>> >> Steve Izett
>> >>=20
>> >>=20
>> >>=20
>> >> > On 12 Jan 2020, at 8:44 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>> >> >=20
>> >> > Steve,
>> >> >=20
>> >> > Tracy installed the capacitor on both MAP sensors not just the =
A. =46rom memory, I believe the sensor manufacturer recommends using a =
capacitor in their documentation.
>> >> >=20
>> >> > Shield wire for the temperature sensor might be worth a try.=20
>> >> >=20
>> >> > Bobby=20
>> >> >=20
>> >> > Sent from my iPad
>> >> >=20
>> >> >> On Jan 11, 2020, at 6:09 PM, Stephen Izett =
stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>> >> >>=20
>> >> >> =EF=BB=BFThanks Bobby
>> >> >>=20
>> >> >> If I cant fix the RFI at the Source I=E2=80=99ll pull the EC2 =
and check it.
>> >> >>=20
>> >> >> Did Tracy ever explain his "long answer" as to why Processor A =
has had problems and not B?
>> >> >> All I can think of is the intake temp input.
>> >> >>=20
>> >> >> I=E2=80=99m wondering how do you identify the EC2 processors as =
A & B when I=E2=80=99m looking at the PCB?
>> >> >>=20
>> >> >> Cheers
>> >> >>=20
>> >> >> Steve Izett
>> >> >>=20
>> >> >> > On 12 Jan 2020, at 12:43 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>> >> >> >=20
>> >> >> > Steve,
>> >> >> >=20
>> >> >> > I believe Tracy started adding the capacitor to all newly =
built EC2/3 so you may already have it. It=E2=80=99s very small and was =
soldered across two of the three MAP sensor legs on the EC2. Not sure if =
it was installed the same way on the EC3=E2=80=99s.=20
>> >> >> >=20
>> >> >> > Bobby
>> >> >> >=20
>> >> >> > From: Rotary motors in aircraft =
[mailto:flyrotary@lancaironline.net]=20
>> >> >> > Sent: Friday, January 10, 2020 9:20 PM
>> >> >> > To: Rotary motors in aircraft
>> >> >> > Subject: [FlyRotary] Re: Fwd: [FlyRotary] Re: Engine miss
>> >> >> >=20
>> >> >> > Thanks Andrew.
>> >> >> >=20
>> >> >> > So Tracy never explained the =E2=80=9Clong story=E2=80=9D?
>> >> >> > Did you add the caps and did they help or not?
>> >> >> > I=E2=80=99m thinking not, as you mentioned changing to a =
better shield to the CAS=20
>> >> >> >=20
>> >> >> > Steve
>> >> >> >=20
>> >> >> > > On 11 Jan 2020, at 10:30 am, Andrew Martin =
andrew@martinag.com.au <flyrotary@lancaironline.net> wrote:
>> >> >> > >=20
>> >> >> > > Steve. Here is the post from Tracy regarding engine miss on =
A computer.
>> >> >> > > Andrew
>> >> >> > >=20
>> >> >> > > ---------- Forwarded message ---------
>> >> >> > > From: Tracy <flyrotary@lancaironline.net>
>> >> >> > > Date: Tue, 26 Jul. 2016, 11:22 pm
>> >> >> > > Subject: [FlyRotary] Re: Engine miss
>> >> >> > > To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>> >> >> > >=20
>> >> >> > >=20
>> >> >> > > HI Andrew,
>> >> >> > > The exact cause of A having the problem and not B is a long =
story but the fix is to install a .1 uF capacitor across the ground and =
output pins (1 and 2 I think) of the A controller MAP sensor. I'd do it =
for you but I'm away from my shop until mid Oct.
>> >> >> > >=20
>> >> >> > > Tracy Crook
>> >> >> > >=20
>> >> >> > > Sent from my iPad
>> >> >> > >=20
>> >> >> > > > On Jul 26, 2016, at 03:56, Andrew Martin =
<flyrotary@lancaironline.net> wrote:
>> >> >> > > >=20
>> >> >> > > > I must have really upset Murphy, I just cannot seem to =
get a break with this plane.
>> >> >> > > >=20
>> >> >> > > > I need help from an EE or anyone who gets a kick from =
lectrics.
>> >> >> > > >=20
>> >> >> > > > Since putting the engine back in the plane I have an =
issue whenever I push the PTT the engine runs like crap. Finger off PTT =
all good immediately. And this only happens on A computer, B seems =
unaffected on EC2, how can this happen?
>> >> >> > > >=20
>> >> >> > > > A&B are tuned slightly different, B is still at pre =
engine rebuild state, but I cannot see how that would be a factor.
>> >> >> > > >=20
>> >> >> > > > I just cannot see how the Radio transmission can affect =
one computer & not the other, they are identical aren't they, in the =
same box connected to the same wires. Is it possible I've damaged the =
EC2 sometime in the past and just not noticed it, how would I check it =
now?=20
>> >> >> > > >=20
>> >> >> > > > Andrew
>> >> >> > > >=20
>> >> >> > > >=20
>> >> >> > > > --=20
>> >> >> > > > Regards
>> >> >> > > > Andrew Martin
>> >> >> > > > Martin Ag
>> >> >> > >=20
>> >> >> > > --
>> >> >> > > Homepage: http://www.flyrotary.com/
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http://mail.lancaironline.net:81/lists/flyrotary/List.html
>> >> >> >=20
>> >> >> >=20
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>> >> >> >=20
>> >> >> >=20
>> >> >> > Disclaimer
>> >> >> >=20
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>> >> >> >=20
>> >> >>=20
>> >> >>=20
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