Old 16th Aug 2015, 17:29
  #46 (permalink)  
Virtually There
Join Date: May 2007
Location: Australia
Posts: 190
Originally Posted by Lumps
Torque is measured in PSI in these kiwi kites. For the PT6A-34AG in this formula k=0.00581

yr right, there does not seem to be a variable in this formula to account for bypass being open or not . . .
Law of thermodynamics anyone? Why do ITT and fuel flow both increase for the same torque when intake flow is restricted?

I'm not an engineer, but ram air isn't really an "effect" - it's an intrinsic part of the design of a turbojet that relies on mass airflow for compression and cooling. An inertial separator is a compromise measure that protects said engine whilst hurting efficiency (and any power reserves you might need in the event of an emergency during take off).

It's use has limits, which are reflected in the POH.

I'd also argue that when any bypass is engaged on any aircraft, it must have an effect on aerodynamics (beneficial or otherwise), because it introduces airflow passage to a part of the aircraft where there was none prior.

That effect can be measured by a change in airspeed. Or not.

Last edited by Virtually There; 16th Aug 2015 at 19:37.
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