H plus landing gear issues

Discussion in 'Typhoon H Plus Discussion' started by Condor 3, Mar 20, 2020.

  1. Condor 3

    Condor 3 New Member

    Mar 20, 2020
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    Neither the up or down work on the landing gear. It is stuck down so at least I can fly for Drone fishing.

    I put 9 VDC to the gear motors and they work. It there a way to test the power contacts to the gear motors? Is their a way to test the up down toggle switch on the St16S?
     
  2. h-elsner

    h-elsner Active Member

    To test landing gears put the drone at his back. This works also for H Plus.

    To test the switch on ST16 use HW monitor. I hope the ST16 from the H Plus has that also. I know it only from the Typhoon H. If there is no HW monitor, you can check switch function in Flight2Log, Remote*.csv, Channel CH10.
    4095=gear down, 0=gear up.

    br HE
     
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  3. Condor 3

    Condor 3 New Member

    Mar 20, 2020
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    I have tested drone on its back many times. Switched up down toggle 10 times. No luck
    9vdc on landing gear motors cycles the gear.
    If I put a meter on the copper shoe the gear motor contacts and toggle up down switch should it show 9 VDC?

    HW is hardware monitor? Is that the screen on st16s where you can test all the switch’s on and off. This screen
    Shows the up down working.I don’t know what flight2log is.
    It flys well with gear down.
     
  4. Condor 3

    Condor 3 New Member

    Mar 20, 2020
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  5. WTFDproject

    WTFDproject Active Member
    Staff Member

    Oct 3, 2018
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    Retired Power Plant
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    The Typhoon H has a habit of jamming the gears inside the actuator. When jammed, they cannot move even though the electrical part is normal.

    If either actuator is jammed, neither actuator will move.

    The first task is to determine if BOTH are jammed, or only one. To do this:
    1.) Remove one actuator assembly from the drone.
    2.) Turn the drone over, and see if the remaining actuator will move.
    3.) Remove that actuator.
    4.) Re-install the other one, and see if it will operate.

    If either (or both) refuse to operate, try to bump them in the right direction while operating the switch. If that does not work, it may be necessary to dismantle the actuator, manually spin the drive bar into the middle area of the screw, then reassemble it.
     
  6. h-elsner

    h-elsner Active Member

    The langing gear motors run with 5V. It's not a good idea to test with 9V because the thread inside goes too tight at the lower/upper end and there is not automatical stop.
    I test with 1.5V. If it runs smooth it will sure running with 5V. If not, you will dicover mechanical problems which you will never see with 9V overpower.

    br HE

    PS: flight2log is a directory on your ST16 where telemetry and flight logs are recorded. It contains a lot of useful information that cal also be used for diagnosis.
     
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  7. Condor 3

    Condor 3 New Member

    Mar 20, 2020
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    Thanks for all the ideas. I did everything and gears wouldn’t move . Upside down ,right side no luck.
    So I thought I’d just fly with the gear down.
    Know what’s coming? ....I flipped the up down toggle and it worked fine. Every time.
    I have no idea why it’s now working ,but I’m happy.
    Thanks\
    Jim



    Sent from my iPad using Yuneec-Forum.com
     
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  8. GaDrone

    GaDrone New Member

    Jul 7, 2017
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    I am having landing gear issues. No hard landings, crashes, etc. There have been times where one leg will retract and the other stays down. However, the other day, after a LONG time of no flights, one leg went up about half and stayed there. The other did not go up at all. For landing gear down, the leg did start down but stopped. When I managed to land without incident, the "working leg" is very loose. In fact, it will not fit back in the case because it is not fully down. I did the power everything up, turn it upside down, flip the switch and it acted just as it did in the air. Turned it over, off, on, gear went back to same malfunction position. Any thoughts???
     
  9. h-elsner

    h-elsner Active Member

    Sounds like the mounting element YUNTYH131 is broken inside the mechanism.
    YUNTYH131_broken.jpg

    br HE
     
  10. WTFDproject

    WTFDproject Active Member
    Staff Member

    Oct 3, 2018
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    Retired Power Plant
    North Carolina Piedmont
    You can also remove one of the landing gear, see if the other one works normally. If not, remove that one and try it with the other one. It could also be one is broken, and the other just jammed. Both are common on the TH. It's the same landing gear as H Plus, H520, but the TH suffers from "bouncy landing" more than the other two. I suspect it is the bouncy landings that create landing gear issues to appear more often than on the others.
    And by the way, if one retracts and the other stays down, That's a dead giveaway the part mentioned above is broken in the one that stays down. Possibly the other also, but you won't know until you try them individually.
     
  11. GaDrone

    GaDrone New Member

    Jul 7, 2017
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    5
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    Wow. You are such a great resource and free with your knowledge. Thank you so much for your help through the years. I will try these tips. I forgot about the bounces. I try to land grass but have had many pavement landings.
     
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