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Thread: Talk about Tq
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Old 17th Nov 2008, 19:58
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Jeep
 
Join Date: Apr 2000
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Very interesting answers.

Shawn I had to look up that word

LBH i have replied to your PM.

I think it is becoming clearer to me. The TQ limit in this case is set at approx 150%. If that limit is reached, the collective can be raised and Nr will decay but the TQ should not rise (display) because that is the limit.

If a TGT or NG limit is reached before the TQ limits, then raising the collective will still incur an Nr droop, but TQ will continue to rise.

Of course in both cases there is a TQ rise but the display to the crew will depend on the output from the FADEC which goes to a gauge (display). TQ limit stops TQ rising?

So I wonder what is the difference in the two scenarios? How does the FADEC limit the engine output to the transmission in both of those cases? How can the FADEC stop the increase in TQ passed the TQ limit without an increase in 'total' TQ ie TQ limit and overpitched NR droop?
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