I work at a software company which builds record-keeping software for aviation.

What is the meaning of TRQ / N1 in a flight log, under a T/O Thrust header? I imagine it refers to torque at N1 (but in my limited experience, I have rarely encountered instantaneous torque as a relevant measure in aviation so I'm suspicious).

What is the meaning of TRQ / N1? Is this, like N1, expressed as a percentage?

(Indeed, we have a close relationship with out clients and can ask them, but answers sometimes take time and I prefer to be proactive and know more than the bare minimum.)

  • $\begingroup$ @Federico That in itself is useful information. I assumed these were industry-standard terminology. I edited to add more context if it helps. $\endgroup$ – msanford Mar 2 '17 at 15:07
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    $\begingroup$ Torque is used extensively as a power setting and limiting indication in turboprop applications. $\endgroup$ – J Walters Mar 2 '17 at 15:13
  • $\begingroup$ @JonathanWalters Thank you for noting that! $\endgroup$ – msanford Mar 2 '17 at 15:15

Jet engines use N1, EPR, or lately (Airbus A350) Thrust % values for takeoff power.

Turboprop aircraft use torque. So it's either N1 or torque for your software depending on which aircraft is used for the flight.

  • $\begingroup$ Indeed, the fleet consists entirely of turboprop aircraft. Thank you! $\endgroup$ – msanford Mar 2 '17 at 15:15

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