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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-941570@logan.com>
Subject: Re: [FlyRotary] Re: Injector pulseing ? Tracy ?
Date: Sun, 22 Jan 2006 23:46:09 -0500
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Dean,

Here's my take on it.   For all six faces to go through their cycle requires 
1080 deg of e shaft rotation.  So if you have six faces (3 x 2 rotors) then 
each face requires 1080/6 = 180 degrees of e shaft rotation to complete its 
cycle.  So two faces (one on each rotor) would complete their cycle (intake, 
compression, combustion, exhaust) in 360 deg of the e shaft rotation.

I believe the EC2 fires all four injectors (assuming it has staged) once 
during that 360 deg rotation of the e eshaft providing sufficient fuel for 
the two faces (approx 2 x 40 cid = 80 cid) of ingested air/fuel mixture.

But, Tracy is obviously the one who really knows {:>)

Ed A


> Tracy, Ed, and Kelly
>
> I am not up to speed yet on the EC2, but aren't we really saying that 
> injector pulsing is one time per rev per rotor ?  And how would Mark 
> Burton's constant speed controller react if the EC2 was switched to 
> injector disable mode.  Depending on how it was wired, it might suddenly 
> sense zero power or 2X power.  Just thinking out loud.
>
> Best Regards
> Dean Van Winkle    RV-9A  13B
>
> ----- Original Message ----- 
> From: "Kelly Troyer" <keltro@att.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, January 22, 2006 5:36 PM
> Subject: [FlyRotary] Re: Injector pulseing ? Tracy ?
>
>
>> Tracy and Ed,
>>    Thanks for the info......I am talking to the producer of a
>> constant speed prop controller for my "IVO" and he needed to
>> know how many injector pulses per revolution.....Uses it as a
>> signal for the power percentage function of his controller....
>> Like I need to duplicate one of my EM2 functions !!
>>
>> --
>> Kelly Troyer
>> Dyke Delta/13B/RD1C/EC2
>>
>>
>>
>>
>>
>> -------------- Original message ----------------------
>> From: "Ed Anderson" <eanderson@carolina.rr.com>
>>> Hi Kelly,
>>>
>>> I've been over this with Tracy several times and the answer is always 
>>> "ONE  time
>>> per rev" {:>).  The reason I ask the question is that for my EFI fuel 
>>> monitor to
>>> give the right answer, I have to set a constant for the injectors flow 
>>> rate that
>>> is twice the rate flow Mazda claims.  But, if the injectors did pulse 
>>> twice per
>>> rev then the stated injector flow rate would suffice.
>>>
>>> However, no matter how many times I ask Tracy,  he stubbornly keeps 
>>> insisting
>>> "only once per rev" {:>)
>>>
>>> Ed A
>>>   ----- Original Message ----- 
>>>   From: Tracy Crook
>>>   To: Rotary motors in aircraft
>>>   Sent: Sunday, January 22, 2006 2:37 PM
>>>   Subject: [FlyRotary] Re: Injector pulseing ? Tracy ?
>>>
>>>
>>>   Easy one!  No.
>>>
>>>   Tracy
>>>     ----- Original Message ----- 
>>>     From: Kelly Troyer
>>>     To: Rotary motors in aircraft
>>>     Sent: Sunday, January 22, 2006 12:57 PM
>>>     Subject: [FlyRotary] Injector pulseing ? Tracy ?
>>>
>>>
>>>     Tracy,
>>>         Do I have this correct ? The EC2 batch fires the injectors 
>>> therefore all
>>> the injectors (if above
>>>     stageing MAP) pulse twice per eccentric shaft 
>>> revolution.........Inquiring
>>> minds want to know !!
>>>
>>>
>>>     Thanks
>>>     --
>>>     Kelly Troyer
>>>     Dyke Delta/13B/RD1C/EC2
>>
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>