-----Original Message-----
From: Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Sun, Oct 4, 2020 5:29 pm
Subject: [FlyRotary] Re: RWS EC backup crank sensor
Hi all
I’m pretty sure I programmed my EC2 for and had the backup sensor functioning but it was years ago and I know with my current setup the backup sensor is disconnected.
The backup sensor in 90deg out of phase. So looking at the front of the engine its at ~3 o’clock as Dave says.
Note:
We had an all electronic ignition Glasair 3 IO470 go down due to a belt failure taking out the electronic ignition CAS.
I put a stainless steel wire in the harness of the CAS’s to protect against this single point of failure.
Cheers
Steve Izett
>
> Dear Finn,
> Sensor at 6:00 0’clock is primary. Sensor at 3 o’clock is backup.
> If you cannot locate appropriate software, I can reconfigure the sensor physical locations if necessary.
> Dave Barker
>
> Sent from my iPad
>
>>
>>
>> Thanks Bobby
>>
>> In some of the manuals I've see 90 degrees before the primary, but in the code I looked at I think it mentioned 180 degrees.
>>
>> So, I'll have to look further. It sure will be interesting to find out how it determines if primary sensor has failed. Wonder what happens when backup sensor fails and primary is OK. With no other inputs, I don't see how it can work.
>>
>> Finn
>>
>>> Finn,
>>>
>>> Both processors see both signals on pins 36&37. I think the second sensor must be mounted 180 degrees opposite the main.
>>>
>>> Bobby
>>>
>>> Sent from my iPad
>>>
>>>>
>>>> Does anyone have an RWS EC running with backup sensor?
>>>>
>>>> Yesterday I briefly looked at the EC code (program) and it appears that
>>>> when you have a backup sensor controller A uses main sensor and
>>>> controller B uses the backup sensor; is that correct?
>>>>
>>>> Or is there some automatic detection of main sensor failure that causes
>>>> a switch-over to the backup sensor for both A and B, that I missed?
>>>>
>>>> Finn
>>>>
>>>>
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