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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Latest EC2 updates, Installation notes
Date: Wed, 4 Oct 2006 19:47:11 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

My CZ had problems at the beginning with the EM2. I was getting all  
sorts of Japanese characters on the display. Installed filter per  
Tracy's recommendation and all it's fine now.
Tracy, if I bring the EC2 to the SB get together, can you update it  
then, or have to ship it?
Buly
On Oct 4, 2006, at 10:31 AM, Tracy Crook wrote:

> While trouble shooting Al Gietzen's EC2 engine controller problems,  
> he mentioned that he was seeing relatively large mixture changes   
> when the alternator was switched off and the battery voltage went  
> low.  The mixture goes leaner with lower battery voltage because  
> the injectors take longer to open.  It was well within the range of  
> the manual mixture control to correct but it got me to thinking  
> about adding battery voltage compensation to the EC2.  This has  
> been done and all controllers shipped after 9-20-06 now incorporate  
> this feature.  Not a freebie, but if anyone wants this incorporated  
> into an earlier EC2 it can be retrofitted.
>
> The other update is a rev limiter. It was easy to do so I went  
> ahead and added it. I haven't seen this as a priority because in  
> our application if you make use of it, it means that you need to be  
> more concerned about the pilot's health than the engine's (the prop  
> has fallen off the airplane).  The default rev limit is 8000 rpm.    
> If you want something different, specify when ordering.    (Also  
> retrofittable)
>
> EC2 / EM2 Installation Note.
>
> This only applies to EC2 engine controller installations combined  
> with early two-part EM2 engine monitors in canard aircraft where  
> both units are installed near the engine and have long wiring  
> harnesses connecting them to the EC2 front panel and EM2 display (a  
> rare combination that may be unique to Al's airplane).   Have been  
> working with Al for some time searching for the cause of random MAP  
> table and other EC2 parameter corruption.  I am now almost certain  
> that the cause is noise coupling from the EM2 display harness into  
> the EC2 control panel harness.  The two harnesses were laced  
> together in Al's installation.   He is in the process of separating  
> them now (sympathies to Al, no picnic).   Needless to say at this  
> point,  never run these two harnesses together and separate them as  
> far as practical.   I think Al will have about 4 inches between  
> them when separated.
>
> Tracy Crook,   RWS
>