My vision here was to have CAS1 on ECU1 and 2 on 2. So the standard"= ; flip to backup on any trouble" would cover this too. If that's p= ossible to wire-=A0 Tracy?

On Sep 15, 2011 5:31 PM, "Tom Walter" = <roundrocktom@yahoo.com>= ; wrote:
> Worth a try!
>
> With a = gear running in north south orientation, on sensor facing west, the other f= acing east....=A0 Would be simple to rig up
> a test fixture and try it.
>
> Someone asked about instal= ling the two sensors shoulder to shoulder.=A0 With a 8" wheel,=A0 a 5 = degree offset is about 0.35", which is pretty tight spacing.=A0=A0 If = you went 10 degrees, it would work for that limp home mode function (retard= ed timing).
>
> A simple two rotor solution, is independent ECU systems for f= ront and rear rotors. The two sensors being 180 degrees apart to match roto= r faces.
>
> For the Bosch Systems, we had "limp home&quo= t; built into ignition chip, with backup from the camshaft sensor.=A0 If CA= S failed, then cam sensor could be use for batch firing fuel injectors, and= simple ignition spark.=A0=A0=A0 I've told the story of having the wron= g XTAL filter caps on the module.=A0=A0 The Main CPU (6805) oscillator didn= 't start, so the engine went into Limp Home mode... Cold Weather Emissi= ons Testing facility.=A0 I wonder if anyone at Fiat still remembers that on= e (circa 1985).=A0 25 years later I can chuckle about that one!=A0 Ljetroni= c3.1 was a fun project (hybrid on the top of the airflow meter).=A0
>
>
> Tom
>
>
>
> _____________= ___________________
> From: "CozyGirrrl@aol.com" <C= ozyGirrrl@aol.com>
> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
> Sent: Thursday, Sept= ember 15, 2011 4:14 PM
> Subject: [FlyRotary] Re: The good news and t= he bad news......
>
>
> Not side by side-
> In the placement described= we are talking about them facing each other with
> a gap between th= e faces of 0.100~0.125 and the wheel face between them like an
> int= errupter between optical sense and receive.
> =A0
> Chrissi &
> Randi
> www.CozyGirrrl.com
> CG
> Products, Custo= m Aircraft Hardware
> Chairwomen, Sun-N-Fun Engine Workshop
> <= br> > =A0
> In a message dated 9/15/2011 4:01:36 P.M. Central Daylight= Time,
> alwick@juno.com writ= es:
> <concern is that the two sensors may have interference with= each other.
>>=A0
>>Highly unlikely. I have friends who measure integrit= y of signal with oscilloscope. Shielded device with highly directional sen= sitivity. Though they've never measured two side by side. Good theory,= though.
>>=A0
>>-al wick
>>----- Original Message ----- >>>From: wrjjrs@aol.com >>>To: Rotary motors in aircraft
>>>Sent: Thursday, = September 15, 2011 12:18 PM
>>>Subject: [FlyRotary] Re: The good news and the bad news......<= br>>>>
>>>
>>>There is nothing wrong with= that idea. The only concern is that the two sensors may have interference= with each other. The idea is to put another toothed wheel rotated say a r= andom 33.715 degrees relative to the first wheel. Now you place the second= sensor rotated the same 33.7....etc degrees. So now when you switch senso= rs the timing is the same. Also the two sensors don't interfere with e= ach other.
>>>Bill
> Jepson
>>>
>>>Connect= ed by DROID on Verizon Wireless
>>>
>>>-----Origin= al
> message-----
>>>
>>>From: Chad Robinso= n <crobinson@medialantern.= com>
>>>>To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>>>&= gt;Sent: Thu, Sep 15, 2011 17:45:46 GMT+00:00
>>>>Subject: = [FlyRotary] Re: The good news and the bad news......
>>>>
>>>>
>>>>On 9/15/2011 1:21 P= M, Tracy wrote:
>>>>The CAS references the crank, not the = rotor. =C2=A0 Is that. It?
>>>>>I'm still confused a= bout something myself. Everybody keeps talking about adding another CAS as= requiring it to be "in a different position", with an offset. M= y 3rd-gen CAS sits on a small bracket just behind the toothed wheel on the= front shaft. Past that toothed wheel there's a healthy (from memory: = 1.5"?) gap from there to the back of the alternator pulley.
>>>>
>>>>What's to stop me from making a > bracket and putting a second CAS in that gap, facing backward? = It would be
> in exactly the same position as the current CAS,= just facing backward.
> Would they interfere with one another? If so, as an alternative,= what
> about using a second toothed wheel either on top of th= e first and before
> the alternator pulley, or if side loads w= ere a concern, on the very end of
> the shaft past the
> pulley?
>>>>
>&= gt;>>