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Hi Steve,
Thanks for checking that out. That's pretty much what I though it
should do as needing to know whether the injectors are powered or not
would be more complicated.
Speaking of your data logger, are you selling a info/design CD yet?
I would like to build on for use in my Alpine installation. I used a
video camera for data capture in the BD-4 but had to remember to push
the button to go to different screens to get all the data.
Bob W.
On Mon, 13 Jul 2009 16:24:14 -0600
sboese <sboese@uwyo.edu> wrote:
> This weekend I had a chance to make some observations concerning the
> previous discussion on the use of the cold switch and the injector backup
> mode on my EC2 used with a 13B.
>
>
>
> When idling, turning on the cold switch results in all four injectors
> delivering fuel at the pulse width that was used by the primary injectors
> before the cold switch was turned on.
>
>
>
> When idling, turning on the cold switch results in the staging data bit
> changing from indicating operation at MAP below the staging threshold to
> operation above the staging threshold even though the MAP is very low.
>
>
>
> With the cold switch on, gradually increasing MAP results in a gradually
> increasing injector pulse width from idle to full throttle with no
> discontinuity when the staging threshold is crossed.
>
>
>
> Turning off the power to either the primary or secondary injectors has no
> effect on the pulse width applied to the injectors or the status of the
> staging data bit.
>
>
>
> Based on the above observations, it appears that the EC2 does not need to
> know whether or not power is being sent to the injectors. Regardless of the
> MAP at the time, turning on the cold switch results in the EC2 operating
> with all four injectors as if the MAP was above the staging threshold but
> with a pulse width appropriate for only two injectors being used.
>
>
>
> My statements below concerning the cold switch position appear to be in
> error. The position of the Cold Switch is not one of the things contained
> in the data log captured from the EC2 so that piece of data was from my
> memory which is poor at best. Sorry Bob.
>
>
>
> I probably should have maintained the "Avoid reading.." subject line.
>
>
>
> Steve Boese
>
>
>
>
>
>
> From:
>
> Steven Boese <sboese@uwyo.edu>
>
>
> Subject:
>
> RE: [FlyRotary] Re: Below staging
>
>
> Date:
>
> Mon, 6 Jul 2009 00:24:28 -0600
>
>
> To:
>
> "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
>
> <http://lancaironline.net/lists/flyrotary/Message/46928-H.txt> Message
> Header
>
> <http://lancaironline.net/lists/flyrotary/Message/46928-P.txt> Undecoded
> Message
>
>
>
> Bob,
>
> In contrast to when the primary injector power is off, when the
> secondary injectors are turned off and the cold switch on, the EC2
> indicates staging is taking place normally at the staging threshold, in
> my case at about 20 inches MAP. The engine doesn't go lean after
> staging is indicated, however. When idling with the secondary injectors
> turned off and the cold switch on, the EC2 indicates no staging has
> taken place. Of course, what the EC2's staging data bit is telling the
> outside world and what The EC2 is actually doing may be two different
> things.
>
> Steve Boese
>
>
>
>
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/
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