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Manual checklist does not mention ground power is needed


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  • 2 weeks later...
Posted

Should we flip APU Start switch down, after engine start completed?

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Posted

Manual did not mention it. I have just kept it up. It's weird because I don't hear the APU start up, like how it roars in the A-10. It also doesn't take time to start, just flick the switch and hit the engine start, and she starts

Posted
Manual did not mention it. I have just kept it up. It's weird because I don't hear the APU start up, like how it roars in the A-10. It also doesn't take time to start, just flick the switch and hit the engine start, and she starts

 

well the apu seems to actualy be a jsu, kinda like the f16 and the ground power mostly seems to be for testing elements with out the engine, like the nose cone extention. also the aircraft is fully able to start on battery power. also you might use gpu to turn on most of the subsystems and radios while the engine is running up. ether way, the aircraft is easy enough to work on the ground.

Posted

MiG-21 designed as interceptor and takes less than 60 seconds to go from cold to taxiing, I don't think it would need groundpower..... I have never needed it....

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Posted

I can't remember where I read this so take it with a pinch of salt, but I seem to recall reading the Mig21's batteries are a bit rubbish (at least, in earlier models), and that while it was entirely possible to start from batteries, you'd only be able to do so about 5/6 times as the current drain would trash the batteries (deep cycling), so it was common to start from ground power to avoid having to replace them.

 

Take that with a pinch of salt though as I've no references.

Posted

Thanks replies for APU switch. :)

Intel i7-14700@5.6GHz | MSI RTX4080 SuperSuprimX | Corsair V. 64GB@6400MHz. | Samsung 1TB 990 PRO SSD (Win10Homex64)
Samsung G5 32" + Samsung 18" + 2x8"TFT Displays | TM Warthog Stick w/AVA Base | VPC MongoosT-50CM3 Throttle | TM MFD Cougars | Logitech G13, G230, G510, PZ55 & Farming Sim Panel | TIR5 & M.Quest3 VR
>>MY MODS<< | Discord: Devrim#1068

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