Nealius Posted March 2, 2013 Author Posted March 2, 2013 Right now I narrowed it down to incorrectly following the checklist. I still get the Master Caution warnings when spooling up the engines though. I'll update a little later, right now I'm just fooling around with it. I also read that Master Cautions when shutting down the aircraft are normal? It seems to be a bit of a pain to have to constantly reset the warnings every time you flip a switch.
Eddie Posted March 2, 2013 Posted March 2, 2013 Right now I narrowed it down to incorrectly following the checklist. I still get the Master Caution warnings when spooling up the engines though. I'll update a little later, right now I'm just fooling around with it. I also read that Master Cautions when shutting down the aircraft are normal? It seems to be a bit of a pain to have to constantly reset the warnings every time you flip a switch. Master cautions on start up are normal as well. Master Caution does not necessarily mean ere is something wrong, it just means there is a new situation that you need to be aware of, and act upon. But if you are using an old version, there will be more cautions than there should be due to a bug or two that has long been fixed.
Nealius Posted March 31, 2013 Author Posted March 31, 2013 Finally upgraded and relearned everything. I noticed the APU GEN light goes off with a Master Caution warning after starting up the left engine. According to another thread this is normal behavior, but I'm wondering what I should do. Just hit the MC button to shut it up and leave the APU GEN switch on or turn the APU GEN switch off?
Evil.Bonsai Posted March 31, 2013 Posted March 31, 2013 (edited) Finally upgraded and relearned everything. I noticed the APU GEN light goes off with a Master Caution warning after starting up the left engine. According to another thread this is normal behavior, but I'm wondering what I should do. Just hit the MC button to shut it up and leave the APU GEN switch on or turn the APU GEN switch off? You need the APU on and the APU generator on UNTIL BOTH engines are at speed and both engine generators are on. The APU generator provide all the electrical power until the engine generators are at full speed. Once the engines are at full speed, and their generators are providing full power, you can then shut off the APU generator and APU. (if landing for refuel/rearm, you can start the APU and turn on APU generator or ask for Ground power before shutting down engines. This way your electronics won't shut down as well) With regards to APU and engine start, this is MY procedure: Battery switch ON. Inverter switch ON. Right/left engine generators ON. Left/right wing/fuselage fuel switches ON. Turn on APU. Once APU reaches 100, flip APU generator ON. Start left engine. Once engines start light goes out, start Right engine. Once Engine start light goes out, turn APU Generator OFF. Turn APU off. During all this, silence any alarms as they occur. Edited March 31, 2013 by Evil.Bonsai
Hamblue Posted March 31, 2013 Posted March 31, 2013 Finally upgraded and relearned everything. I noticed the APU GEN light goes off with a Master Caution warning after starting up the left engine. According to another thread this is normal behavior, but I'm wondering what I should do. Just hit the MC button to shut it up and leave the APU GEN switch on or turn the APU GEN switch off? After the first engine is running turn on it's generator and turn off the apu generator and it will silence. If you accidentally turn off the apu gen first you'll lose power and have to start over. The APU gen does not have to be on through both engines but the APU itself does to start them. Asus Sabertooth P67 Motherboard 2600k CPU, 16 gig DDR3, 1600. Samsung 830, 256 gig hard drive, GTX780 Video Card, Warthog Hotas, Razer Mamba mouse. Saitek Combat Rudder Pedals. Trackir 5, Verizon FIOS 25Meg Up/Down
Nerull Posted April 2, 2013 Posted April 2, 2013 The APU gen does not have to be on through both engines but the APU itself does to start them. Doesn't the APU give the bleed air to start up the engines?
Mt5_Roie Posted April 2, 2013 Posted April 2, 2013 (edited) Yes, the APU provides bleed air. It's like its own little engine that gives the ability to start the engines; the bleed air helps ignite the fuel for the engines. Its a little more complicated than this but I keep it on until both engines are on. As for the alarm on the first engine start sequence, you can silence it, or before engine RPM reaches 50%, turn off the APU generator power, but leave the left and right engine generator switches on. Edited April 2, 2013 by selayan Coder - Oculus Rift Guy - Court Jester
Luzifer Posted April 2, 2013 Posted April 2, 2013 It's like its own little engine that gives the ability to start the engines; the bleed air helps ignite the fuel for the engines. It doesn't help ignite the fuel, it simply cranks the engine until it has a sufficient RPM for proper combustion and can power itself. The APU in turn is cranked by an electric motor running off the batteries.
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