gear down speed?

[Raymond J1]

14 minutes ago, PeteMc said:

Isn't the limiting speed for the movement of the gear?  Didn't think there was a limiting speed when in locked down position.  Though the limiting factor was stress on the motor, though I guess some of the gear doors could rip off (but don't remember that ever being the issue).

I don't no, but it's the limit for the structure (gear, wing, flex hose break, rod of doors, doors,... ?)

Step retract extend as no limit on the POH...

[BobbyH]

38 minutes ago, PeteMc said:

Isn't the limiting speed for the movement of the gear?  Didn't think there was a limiting speed when in locked down position.  Though the limiting factor was stress on the motor, though I guess some of the gear doors could rip off (but don't remember that ever being the issue).

I don't know about the newer models but my 66' E does have a speed limit with gear extended of 120MPH.  It is also the maximum extension and retraction speed.  Makes it easy to remember just one number.

 

[Pinecone]

52 minutes ago, PeteMc said:

Isn't the limiting speed for the movement of the gear?  Didn't think there was a limiting speed when in locked down position.  Though the limiting factor was stress on the motor, though I guess some of the gear doors could rip off (but don't remember that ever being the issue).

There can be a limit for gear in transit coming up.  A different speed for gear in transit going down.  And one for the gear extended.

My M29K 252 has all three.   206 KIAS for gear coming up.  140 KIAS for gear going down.  And 165 KIAS for gear down.

[Fly Boomer]

1 hour ago, PeteMc said:

Isn't the limiting speed for the movement of the gear?  Didn't think there was a limiting speed when in locked down position.  Though the limiting factor was stress on the motor, though I guess some of the gear doors could rip off (but don't remember that ever being the issue).

 

 

At least for the 252, Mooney was pretty explicit with their speeds:

VLE   Maximum Land-   165/165   DO NOT exceed             
         ing Gear Ex-                          this speed
         tended Speed                       with Ldg. Gr. extended.
VLO   Max. Speed for                    DO NOT extend or retract
          Gear Operations                 Ldg. Gr. above these speeds.
         Gr. Retract           104/107
         Gr. Extend            139/140

The two speeds are KCAS/KIAS.

[hoot777]

I’ve got a unique situation. New zero time engine needs break in at 75% power I  have to ferry it gear down due to out of annual.  If I push the 120 then I might mess up my first two hours of engine time. Looking for thoughts.  Gear speed in a citation is 200 k operating but can fly gear down at 292k. 

[hoot777]

I’ve never seen a Vle speed published

[Pinecone]

252 has 165 KIAS max gear extended.

[ArtVandelay]

252 has 165 KIAS max gear extended.

I like to see how the 252 changed the gear, most likely the gear doors and brackets. I’ve had both sides break the mounting brackets.

[kortopates]

I like to see how the 252 changed the gear, most likely the gear doors and brackets. I’ve had both sides break the mounting brackets.

Not only that but 252’s and Encores have 3 doors to cover the gear fully vice the 2 used on the J.
But agree with you, i always extend the gear at speeds much less than max extension gear speed of 140 since it’s much less wear and tear on the gear door rods and brackets which will develop elongated holes eventually leading to breaking.

Incidentally, sloppy gear doors from elongated holes can be repaired by welding the rod holes and re-punching to size without replacing $ rods.


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