|
Steve,
I have been following this informative exchange with great interest and even with my limited knowledge
am able to digest it............Thanks for your work in determining what is going on inside Tracy's little
gray EC2/EC3 boxes in an effort to troubleshoot apparent ignition problems that some of the group
are having or have had in the past..............One thing am curious about ( And I may have missed the
answer) is the reason you have two EC2's ?...............Do you just have a spare or are you actually
flying with both for "Super Redundancy" ??...................
--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
-------------- Original message from "Steven W. Boese" <SBoese@uwyo.edu>: --------------
> Tracy,
> One of the EC2's was updated 01/30/2009 and the other was updated 05/04/2009. While there is a difference in these two EC2's as to how they determine which regions of the MAP table to use, they both are similar with regard to the low
> RPM coil dwell times.
> Abnormally short (or long) dwell times are observed from the minimum RPM that the EC2 generates signals up to the "threshold" at around 1200 RPM. Above that
> threshold, dwell times are consistently in the range of 4-5 ms.
>
> Steve Boese
>
> Crook [tracy@rotaryaviation.com]
> Sent: Thursday, November 26, 2009 8:05 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Ground isn't ground
> Steve, I was looking at the wrong image (the one you sent of the CAS & dwell at cranking speed of ~150 rpm.) . I must have missed this other one when you
> posted it. I'll take a look at the 1200 rpm dwell behavior again. I never
> noticed that. Possibly because 1200 is well above cranking speed but below my
> idle speed of 1600 rpm.
>
> Do you recall the date of your last EC2 update? The low rpm dwell algorithm has
> changed a few times.
>
> Tracy
|