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No, Joe, I don't use the FFL and FFH values for fuel flow (or anything else
for matter).
I measure the injector PW and determine the time they are on and then using
your injector flow rates (gotta know that), I calculated the amount of fuel
passed for flow and fuel used. Get the rpm from that source as well. So I
don't need the serial hook up for my EFISM to work - but if you want to talk
to the EC2 with my EFISM unit then you do need the serial hookup. I have
one user flying with just hooked to the injectors wiring harness and the O2
sensor. Doesn't want to mess talking with the EC2 {:>).
The "FF" code is just an end of string code that Tracy uses to signify when
the communication from the EC2 has finished transmitting its set of data.
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://www.andersonee.com
http://www.dmack.net/mazda/index.html
http://www.flyrotary.com/
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
http://www.rotaryaviation.com/Rotorhead%20Truth.htm
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of jewen@comporium.net
Sent: Monday, July 20, 2009 1:25 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel Flow
Hi Ed,
How do you determine Fuel Flow Rate on your EFISM? I was assuming it was
through the FF value from the EC2.
Thanks,
Joe
---- Original message ----
>Date: Mon, 20 Jul 2009 10:59:49 -0400
>From: "Ed Anderson" <eanderson@carolina.rr.com>
>Subject: [FlyRotary] Re: Fuel Flow
>To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>
>Hi Joe,
>
>FFl and FFH are the two types in the engine data frame for a Fuel Flow
>Function - but my notes says not used by the EM2. So not certain what it
>means, it possible it could be some value that correlates to fuel flow -
but
>I don't see how it could relate to any specific injectors since the EC2
>don't know which injectors you have. So perhaps that is why it is not used
>- but just a guess on my part.
>
>At the end of each engine data frame the EC2 will send an end of command
>byte = FF.
>
>Ed
>
>Ed Anderson
>
>Rv-6A N494BW Rotary Powered
>
>Matthews, NC
>
>eanderson@carolina.rr.com
>
>http://www.andersonee.com
>
>http://www.dmack.net/mazda/index.html
>
>http://www.flyrotary.com/
>
>http://members.cox.net/rogersda/rotary/configs.htm#N494BW
>
>http://www.rotaryaviation.com/Rotorhead%20Truth.htm
>
>-----Original Message-----
>From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
>Behalf Of jewen@comporium.net
>Sent: Monday, July 20, 2009 9:44 AM
>To: Rotary motors in aircraft
>Subject: [FlyRotary] Fuel Flow
>
>I am working on checking all engine instrument calibrations. For those who
>may have done some work interfacing to the EC2's serial data, what does the
>FF (FFL/FFH - Bytes 0x2E & 0x2F) represent? Any insight to conversion
>formulas is appreciated.
>
>Thanks,
>Joe
>
>--
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