Cessna makes emergency landing at navy base

[ryan1234]

Nitrogen? Can you explain please?

This particular prop uses only an air charge (nitorgen), Aerodynamic Twisting Moment (ATM), and a spring to balance the governor's oil pressure. Basically those 3 factors try to keep it towards low RPM (High pitch)... and the oil pressure tries to keep it towards high RPM (low pitch). With a loss of oil pressure the 3 other factors out-balance and send the prop to feather.

You can see in the bottom picture that the tip of the spinner (dome) is off on the right engine... there is a nitrogen relief valve you can let the nitrogen pressure out... if you try to start it, it may bring the prop out of feather... the caveat is that you will not be able to get the prop in feather without adequate nitorgen pressure.

If you're making a 30min jump to the nearest airport to have it serviced... not a huge problem... but that particular aircraft is not really a climber on a single engine with the other engine feathered... if the other engine is not feathered you can expect a difference of about -400fpm ... and that means that the only thing the good engine is good for is getting you to the crash site faster.

 

[HAL Pilot]

Yeah but, yeah but, yeah but .... don't we still teach a PPEL ??? High key ??? Low key ??? All the usual suspects ... ???

That is done with the engine at idle or zero-thrust. He is talking about shutting it down and becoming a glider.

 

[A4sForever]

That is done with the engine at idle or zero-thrust. He is talking about shutting it down and becoming a glider.

Shutting it down ... ???

While airborne ... ???

To 'pretend' you've 'lost one ... ' ???

Then that would be ... as we used to say in the ol' days ... Fucked Up.

Make that ... EXTREMELY ... Fucked Up.

 

[HAL Pilot]

Shutting it down ... ???

While airborne ... ???

To 'pretend' you've 'lost one ... ' ???

Then that would be ... as we used to say in the ol' days ... Fucked Up.

Make that ... EXTREMELY ... Fucked Up.

Especially since it is the only one he has.

 

[rondebmar]

Yeah but, yeah but, yeah but .... don't we still teach a PPEL ??? High key ??? Low key ??? All the usual suspects ... ???

IIRC, PPEL's in single engine jets did no more than keep one inside the safe "Ejection Envelope"...

A "clean" A4 makes a pretty fair glider...but it sucks when "dirty".

Some numbers here:

http://www.skyhawk.org/2d/tins/tins.htm

Read "Gliding Home"...submitted some years ago.

Again, IIRC, NATOPS "suggested" an ejection under those circumstances...but what the hell...if ya got it--flaunt it!