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Yaw Damper with delayed gyro spooling

Featured Replies

Hi!Realy looking forward for the NG...just wondering, what does "Yaw Damper with delayed gyro spooling" mean? A delayed startup for the YD? Just curios.. :)Jonas Lundh

  • Commercial Member

Jonas-Yes. When you turn the YD switch on- it's reaction is not instantaneous. It takes 8 seconds to come on line.Pretty cool, eh?

Robert S. Randazzo coolcap.gif

PLEASE NOTE THAT PMDG HAS DEPARTED AVSIM

You can find us at:  http://forum.pmdg.com

hehe thats great, your attention to detail is just profound. It really is appreciated, now is there a checklist to follow if it comes online in 7.9 seconds ;-) hehe I seriously feel bad for you guys if you type up a list of features of this plane. The list itself is going to be longer than War and Peace just wait until we get the explinations for all of them..Actually though, I do have a question, is there a chance of being able to order a printed manual? Thanks a ton!

Neat ;) thank

Here i put some info about the real Yaw Dumper of the 737-800.Yaw Control: Yaw control is acomplished by a hydraulically powered rudder and digital yaw dumper system. The rudder is controlled by displacing the rudder pedals. The yaw damping functions are controlled throught the stall management/yaw damper (SMYD) computers.Yaw Damper: The yaw damper system consist of a main and stanby yaw damper. Both yaw dampers are controlled throught Stall Management/Yaw damper (SMYD) computers. The SMYD computers receive inputs from both ADIRUs, both control wheels and the YAW DAMPER switch.SMYDs provide yaw damper inputs to the main rudder power control unit(PCU) or stnaby rudder PCU, as appropiate.Either yaw damper is capable of providing dutch roll prevention, gust damping and turn coordination. YAw damper operation does not result in rudder movement. Only maintain yaw dampers inputs are shown on the yaw damper indicator. The pilot can overrride either main or stanby yaw damper inputs using either the rudder pedals or trim inputs.During normal operation the main yaw damper uses hydraulic system B and the SMYD computers provide continuous system monitoring. If the SMYD senses a system fault, the YAW DAMPER Switch is automatically moved to OFF position, the amber YAW DAMPER lights illuminates, the yaw damper is disconnected an the YAW DAMPER switch cannot be reset to ON. If hydraulic system B pressure is lost, the YAW DAMPER switch remain in the ON position until the B FLT CONTROL switch positionated to OFF or STBY RUD. Then the YAW DAMPER lights illuminated and the YAW DAMPER switch cannot be reengaged.During manual reversion flight (loss of hydraulic system A and B pressure), both FLT CONTROL switches are positionated to STBY RUD. In this case, YAW DAMPER switch can be reset to ON and the stanby hydraulic system powers the stanby yaw damper.YAW DAMPER SWITCH:OFF- disengages yaw damperON-* engages main yaw damper to main rudder power control unit if the B FLT CONTROL switch is in the ON position.* engages stanby yaw damper to stanby rudder power control unit if both the A and B FLT CONTROL switches are in the STBY RUD position.Best RegardsTanguy Perera Jim

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