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bluepoole

Quick question on the engines

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I am just curious,  I tried Google but couldn't find anything...what are those "plates" (for lack of a better word),   behind the engines,  that open and close as you throttle up and down?  They seem to stay "open" in flight...

 

Have never seen anything like that and is curious what they do?  Also,  out of interest,  have they been modeled correctly in the version of Carenado?

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serve as a speed brake during landing (on ground), during taxi ...  (thrust reverser) 

 

 not best seen

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These are Thrust Attenuators that deflect thrust at low idle when on the ground. It is a large hydraulic flapper valve that does the job of reducing thrust to save on brake pads. This was only on the early CJ, CJ1 and CJ2 models. FADEC was added with the + models and the engine computer can control the low end thrust levels much better. Some aircraft have a 'ground idle' switch that is a step in the direction of reduced thrust while taxiing.

 

The Williams Rolls engines did not like to idle on the ground, they wanted to go high and fast.

 

Cessna used these TAs in their 3,000 T-37 trainers for the Air Force.

 

They are more or less modeled correctly by Carenado. They move in and out while on the ground with changes in thrust levels that is all they do for the real Citations. I think on the real one, they may be a little more active with more movement than in the simulator.

 

Regards,

 

Ray

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