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17 Jun 2025, 10:58 [ UTC - 5; DST ]


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 Post subject: Re: The Cost of Pratt & Whitney Overhauls
PostPosted: 15 Jun 2025, 01:02 
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Joined: 11/15/17
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Company: Cessna (retired)
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A CJ4 landed behind me at Billy Mitchell Airport (KHSE) on Thursday. It's 3000'. I was pretty impressed.

Larry Ellison's CJ4 operates out of KSQL, 2621 ft.

CJ4 has a proper lift dump system that other small cabin Citations lack, but also has no TRs.

Mike C.


ISTR no CJ's have thrust reversers. At least some have thrust attenuators to help minimize residual thrust, control taxi speeds, etc.

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 Post subject: Re: The Cost of Pratt & Whitney Overhauls
PostPosted: 15 Jun 2025, 12:57 
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Aircraft: C560V
Username Protected wrote:
At least some have thrust attenuators to help minimize residual thrust, control taxi speeds, etc.

The thrust attenuators are on the DEEC engines which have higher idle thrust. The DEEC has limited authority to control the engine.

The engines with FADEC have lower idle thrust since they have complete closed loop control and full authority.

I suspect the DEEC airplanes with paddles deployed are similar idle thrust as the FADEC engines with no paddles. In other words, I wouldn't assume the paddles mean better idle thrust.

Mike C.

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