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If the alternator was working, wouldn't that provide enough power to operate the required engine components to run the engine? (fuel injection, spark & EFM)
This is true if:
Likely having a meeting tomorrow to find out more about what happened.
I am just wiring up my 130 now. I have two of the EarthX batteries that will run in parallel or independently A/B/AB. If I were flying and found that the ECU cut-out, would turning off battery A, and switching to battery B restart the engine in flight? Or is there a startup procedure that would have to happen?
During test runs of our 130 we found the engine will not run on the alternator alone unless the rpm remains high enough for adequate alternator output.
The engine would instantly restart as soon as you re applied power to the system. The scenario could only happen if you somehow completely missed that the alternator went off line
I don't know the minimum, but before you fly I suggest testing yourself by turning off both batteries. I seem to recall it stopped running around 1800 rpm or less. We wrote into our draft POH for a "loss of batteries procedure" to ensure at least 2500 rpm until on short final.
That is not correct. Something is wrong. Be sure the alternator is properly grounded. (Remove powder coating from attach areas of mounting brackets)
When we tested the engine did not have a propeller. Would that make any difference?
I need to make a correction to my previous post. The rpm's were much lower when the engine stopped running (likely under 1000 rpm), and without a propeller. Test run of our Viking 130 today shows the engine running just fine on the alternator only at 1600 rpm and the entire electrical load turned on, including our Dynon heated pitot tube.
Yes, without any trouble at all