From: "Neil Unger 12348ung@gmail.com" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.215.182; envelope-from=12348ung@gmail.com
Subject: Re: [FlyRotary] Re: My EMI journey continues.
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-13422384@logan.com>
Message-ID: <1a6de4af-23a2-6dff-9682-f05dfbeb72a4@gmail.com>
Date: Sun, 26 Jan 2020 07:27:23 +1100
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.4.1
MIME-Version: 1.0
In-Reply-To: <list-13422384@logan.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: en-US

Steve,

             Great to hear you are getting somewhere at last. Neil.

On 1/25/2020 11:05 PM, Stephen Izett stephen.izett@gmail.com wrote:
> Hi people.
>
> An update on the EMI issue with the Glasair
>
> I woke up to the engine cut problem over 5000rpm. Obvious when I think about it now.
>   Its happens at staging.
> When the secondaries switch on it dies, because there is no power to the secondary injectors.
> I have some connectors in circuit so I could add Tracy’s injector failure switching.
> The 14v feed to the secondary injectors had gone open.
> Touching the connector made the symptom go away with full rpm/load available.
>
> So the processor A stumble on radio TX is solved by the 100nF cap decoupling the MAP output.
> And the engine cut was another problem all together. I will remove the faulty utilux connector.
>
> Cheers
>
> Steve Izett
>
>
>
>> On 21 Jan 2020, at 12:44 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>>
>> Hi Guys
>>
>> I got a few hours on the Glasair this morning.
>>
>> Last week after soldering 100nF caps across pin 1&2 of EC2, I couldn’t start the engine on either controller.???!!!
>>
>> I checked the EC2 today and found the Earth Stud on the case was a little loose, so I tightened it up.
>>
>> Engine then started fine and ran on both controllers. One small step for man…..
>> On Radio tx, NO stumble on either controller! Another small step for man….
>>
>> BUT on running up the engine ONE great big step backwards…..
>>
>> Slowly increasing the RPM yields a very consistent engine cutout at just over 5000 rpm on both controllers.
>> At say 3000 and stabbing the throttle yields the same result.
>> If I pull the throttle quickly when it cuts out, it sometimes would recover. Otherwise it stalled completely.
>>
>> I can help but feel the caps are the culprit.
>> Didn't have time to pull the EC2 and test.
>> I would like to remove 100nF and retest.
>> Then I’m tempted to replace with 10nF and retest.
>>
>> OR I could just remove the caps and put some Ferrites on the leads going into the EC2.
>>
>> The RF getting into the ADHARS has, it appears been attenuated significantly by 2 ferrites on the cables entering the unit and the subsequent reduction in VS indicated on radio tx.
>>
>> Till next time…..
>>
>> Steve Izett
>>
>>
>>
>>
>>
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html