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Old 28th Sep 2009, 15:17
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spannersatcx
 
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Cool
The axial gear differential/hydraulic speed control section in the IDG converts a varying engine input speed of 4,650 - 9,200 rpm, to a constant output speed of 12,000 ±150 rpm. The constant output speed allows the generator section of the IDG to produce ac power with a frequency of 400 ±5 Hz.
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