[This note came to my private email address... I don't have my drawings at my
present location and hope that one of you out there might help this gentleman
out.  Please reply directly to him if you can, as he isn't a subscriber to the
LML.  CC the LML with your reply, though... it would be a nice piece of
information to get into the archives.  Thanks for your help.   <Marv>    ]



Posted for "Paul Armstrong" <parmstrong@deerhornaviation.com>:

  Hello Sir,
 
  I am Paul Armstrong, I own a VENTURE 2/3 scale P-51 mustang prototype.
  This aircraft was a prototype with a basic hydraulic gear system and I have
  added Inner Gear Doors. I have purchased the kit for the lancair 320 that
  allows inner gear door sequencing.
  I am in need of the Elec/Hyd schematics for the 320 so I can integrate this
  sequencing kit into my aircraft.
  I would appreciate any help or direction you could provide.
  Thanks
  Paul Armstrong
 
  432-560-2470
 

Paul,

 

The inner gear door actuators are spring loaded and actuated by the same hydraulics as the gear down operation to accomplish their opening. 

 

The sequence valves are actually check valves that do not let fluid from the up side to flow to the door actuators for closing until each main gear leg (or tab on the nose gear) depresses the plunger and defeats the check valve.    Thus, the doors do not close until the gear is up and tight.  There are no electrics associated with this function.  Attached are 3 images - the std 320 gear wiring diagram, pump details and the hydraulic schematic.

 

Good Luck.

 

Contact me via email if you have further questions.