Start Power timing
Does anybody know the typical timing of the below operation? How soon after the engine is started does the engine supply the EMS with generator B power and then switch from Generator B supplying the EMS to Generator A? I'm building an "auto" start power system and need to know how quickly after start to turn off start power. I was going to make it 5 seconds but maybe it needs to happen sooner?
From the Installation Manual: "When the engine is started the engine internal power supply system Generator B is supplying the EMS. At a
certain engine speed , and after a certain amount of stable operating time, the ECU commands power supply
system A to take over. power supply system Generator A remains engaged except in the case of failures. This
procedure ensures that both power supply systems are checked prior to flight. It is therefore important that a
start power switching system releases power prior to commanding power supply system A. This is important so
as not to compromise the check of power supply system Generator B."