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[Non-DoD Source] Re: YAK 52 - Procedure for emergency gear

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wlannon(at)shaw.ca
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Posted: Tue Sep 26, 2017 9:03 am Post subject: [Non-DoD Source] Re: YAK 52 - Procedure for emergency gear

Hi Mark;



Agreed, it is a complicated question.  Am I correct in assuming the shuttle 

valves you refer to are the "Emergency" valves?   They are indeed a shuttle 

type valve but are designed to default (via spring pressure) to the "normal" 

position in the event of a zero pressure situation as you describe in your 

example.



In that example it would seem that, if the handle was left in the up 

position, an immediate unsafe gear situation would result.  Retraction may 

be prevented by trapped air in the down side but down locks would be 

disengaged.  No such problem with the selector in the down position.



All the best;

Walt



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