I noticed that the battery dies very fast when both of the engines and alternators fail. Is it like it in RL? It's impossible to reach any field in these conditions. I was practicing engine failures. Both of the engines failed, so I immediately pitched for my best gliding speed. I shut down fuel, closed the cowl flaps, turned magnetos off and after I feathered the propellers the alternator shut down completely. When I was preparing for landing, just as I wanted to extract the landing gear I noticed that the battery is dead. So fast? In 3-5 minutes?
I tried again but this time I tried turning off the battery until the time comes to extract the landing gear. When I turned it on again it was dead. How did it die if I turned it off?! It's not like this on Flying Lessons on the Emergency procedures lesson. I noticed that if I leave the propellers unfeathered the alternators will still work and the battery will work also. Is this realistic?
In a Cessna 172 the battery will never die in the air because you cannot feather the propeller and the alternator will work all the time. And why can't a Cessna feather it's propeller? Doesn't it produce much drag when windmiling and no thrust at all?
And is there a way to notify the ATC about my emergency? I know that squawk 7700 can be used in real or the 121.500 Mhz radio frequency but I tried doing it in FS2004 and none of it works.