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Message
This is all normal David. The EC2 getting
power through the injectors is a side effect of the voltage spike protection
circuitry inside the EC2.
As an interesting aside, Mark
Kirkpatrick called yesterday to report that he had an in-flight failure of some
sort. The engine quit and he switched to B controller. The engine
ran but mixture was lean so he corrected with the mixture control and landed at
his intended airport which was close by. While taxiing to the
hangar he noticed that the circuit breaker to the EC2 was in the off
position. The only reason the EC2 continued to function was the power
feed back through the injectors. You can imagine how dirty the
power was since the EC2 was constantly switching the injectors on &
off. Mark also switched back to A controller and it ran
OK.
This was not an intended fail-safe feature of the
EC2 but it might have saved Mark and his plane on this occasion. No
word yet on why the breaker blew. It was either a 2 or 10 amp
breaker. The EC2 uses less than .25 amp.
This is another illustration of why you
need to have a *well rehearsed* emergency checklist.
Tracy Crook
----- Original Message -----
Sent: Tuesday, August 19, 2003 10:40
AM
Subject: [FlyRotary] LED on EC2 and Power
from injectors
When I power up my
EC2 the program select button glows red. I am hoping that this is normal
– although green would have been a more re-assuring color. The
interesting thing is that when I supply power to the main buss (but not the
EC2) the LED also glows red. Is this normal? The juice is getting
to the EC2 via the injectors (which are powered by the main buss). If I
unplug the injectors the LED goes out. Seems strange, but I’m hoping
everything is OK and hope I don’t have to start re-wiring.
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