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Old 17th Nov 2013, 08:02
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AvEngr
 
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ATR 42-500 Electrical System
Hi,

Can anyone explain why the main electric system on ATR 42-500 aircraft is DC not AC when according to a lot of online resources AC machines are lighter in weight and simpler in design? Is it because we dont want a CSD/IDG incorporated in a turbo prop? Or is it because DC system can be simpler in wiring by utilizing aircraft fuselage as common ground?

Thanks in advance.
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