Jeff,
If you are below staging, ~1400 rpm and
you independently enable CS, PRI and SEC injectors should deliver fuel because
EC2 knows both have power ON and your MP is low – this is Cold Start
region.
If,
Changing your scenario above to say “independently
disable primary injectors which will shut them off, and has shown to ground the
pin 30, which turns on cold start”, if fuel flow stops and the
engine dies does this mean the EC-2 has a problem?
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent: Tuesday, January 26, 2016
9:41 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: parts
upgrade; was: What do you think may be happening?
Bill:
The answer to your question is the EC2
only cares what the pin 30 state IS, in conjunction with which injectors are
being supplied power plus what your MP and RPM are.
With the DPDT switches you are always
disabling one set of injectors and enabling Cold Start simultaneously –
if they are wired correctly, as per EC2 manual.
If you are below staging, ~1400 rpm and
you disable the SEC injectors/enable CS, nothing should happen because the EC2
knows you have turned OFF power to the SEC and your MP is low.
If you are below staging, ~1400 rpm and
you independently enable CS, PRI and SEC injectors should deliver fuel because
EC2 knows both have power ON and your MP is low – this is Cold Start
region.
There really is no reason to go above
staging (high MP/RPM region) to prove the CS feature in conjunction with MP,
RPM and INJ power are working correctly.
Jeff
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From:
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Bill
Bradburry <flyrotary@lancaironline.net>
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Subject:
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RE:
[FlyRotary] Re: parts upgrade; was: What do you think may be happening?
|
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Date:
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Mon,
25 Jan 2016 15:07:58 -0600
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To:
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'Rotary motors in aircraft'
<flyrotary@lancaironline.net>
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Steve,
Ok, when you turn on the disable switches, they ground the
pin 30 input on the EC-2 to the case of the EC-2. When you turn on cold
start, you ground the pin 30 to the case. How the heck does the EC-2
know the difference so that it can act differently???
Bill
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