FPV HUB
Advanced search  

News:

Who's Online
  • Dot Guests: 181
  • Dot Hidden: 0
  • Dot Users: 0

There aren't any users online.
* Site Sponsor
* Random Gallery Items
Raptor 50

Views: 783
Posted by: Coyote
in: Coyote`s Album
My F450

Views: 667
Posted by: ROVguy
in: ROVguys Album
Hexa... now with lights!

Views: 1675
Posted by: ROVguy
in: ROVguys Album
raptor50 (7)

Views: 846
Posted by: mattydred
in: raptor 50
CIMG0052

Views: 997
Posted by: DPS-Dave
in: DPS Dave Genral stuff
* Latest Gallery Items
My Twin Dream

Views: 487
Posted by: Coyote
in: Coyote`s Album
Vortex 285

Views: 448
Posted by: Coyote
in: Coyote`s Album
Mini Talon Rebuild

Views: 483
Posted by: Coyote
in: Coyote`s Album
Mini 3D Gimbal on MTD

Views: 457
Posted by: Coyote
in: Coyote`s Album
Matek 405-Wing

Views: 467
Posted by: Coyote
in: Coyote`s Album

Author Topic: Mini Titan AH-1W flight 15... failure.  (Read 4447 times)

Granpaw Jonah

  • Wing Commander
  • *
  • Karma: 5
  • Offline Offline
  • Posts: 813
Mini Titan AH-1W flight 15... failure.
« on: May 25, 2014, 11:23:57 AM »

  Flight 15, 4 minutes into flight whilst in a stationary hover at 8ft, the left servo failed leaving the helicopter to drop like a stone onto the ground. The servo has clearly stripped its gears during normal flight, the servo motor is whistling round at 60000 mph! I can't see what other damage there is. Surprisingly little on initial examination. .Main drive cog teeth stripped......I will replace all the servos for metal geared I think.... better go and open her up then. Off we go for another edition of 'Sunday Autopsy'
  G.J.
Logged
'Scuse me while I kiss the sky........

Granpaw Jonah

  • Wing Commander
  • *
  • Karma: 5
  • Offline Offline
  • Posts: 813
Re: Mini Titan AH-1W flight 15... failure.
« Reply #1 on: June 09, 2014, 12:18:40 AM »

....... 1 x new servo, cost 16.00!! Finances (or lack of them) dictated I forget about upgrading all the servos to metal geared. In any rate I have to say that my initial diagnosis that the servo failed is wrong. What I think happened was that
a) the motor shaft did not have a 'flat' ground into it so the pinion grub screw was not gripping properly &
b) the drive pinion on the motor shaft had not been threadlocked. The combination of these factors allowed the pinion to gradually work its way off the motor shaft losing all drive. The servos teeth wwere stripped in the resulting crash.
  I've flown her 5 times since the repair and she flies as well as ever thank goodness.
 So I guess the lesson is that even though you have to unscrew all the factory fitted fuselage removing side mounted rockets etc, remove the drive pinion from the motor shaft and check it has a flat on the motor shaft and that the pinion is threadlocked.. it will be worth it to avoid what happened to me... It feels like a really underhand piece of 'Planned obselescence' by Thunder Tiger , or am I just paranoid?
  G.J.
Logged
'Scuse me while I kiss the sky........

Coyote

  • Tape Apprentice
  • Administrator
  • Marshal of the Royal Air Force
  • *
  • Karma: 315
  • Offline Offline
  • Posts: 19720
    • My New Blog
Re: Mini Titan AH-1W flight 15... failure.
« Reply #2 on: June 09, 2014, 08:39:21 PM »

I think your being a little paranoid, I think it could have just been a simple mistake when it was being constructed initially and not an intentional action. If they did that then there would be a flurry or bad press about it which would do their reputation no good which no company strive for 
Logged
Education and schoolin is good, but FPV is gooder :)

Granpaw Jonah

  • Wing Commander
  • *
  • Karma: 5
  • Offline Offline
  • Posts: 813
Re: Mini Titan AH-1W flight 15... failure.
« Reply #3 on: June 10, 2014, 05:09:11 PM »

    Hi, I'm sure T.T. will appreciate the support. Did I say the motor shaft has splines and the pinion is for a round shaft?
 G.J.
Logged
'Scuse me while I kiss the sky........
 


* Recent Topics
My midlife crisis purchase and a quick rip! by luv2rip-fvp
[Yesterday at 11:38:22 PM]


Well, I registered by ched
[February 20, 2020, 08:51:38 PM]


Took Mark's S900 out for a test! by luv2rip-fvp
[February 17, 2020, 03:22:39 PM]


I'm (attempting) to make a free FPV quad sim by ched
[February 14, 2020, 11:11:38 PM]


PPM/PWM to SBUS converter? by ched
[February 08, 2020, 09:54:15 PM]


220mph Proximity by FPVSteve
[February 07, 2020, 12:51:32 PM]


Matek f405 wing and frsky l9r rssi setup by Brandon1
[February 04, 2020, 11:30:10 PM]


FrSky and ACCST 2.0 - DANGER by ORCA
[February 03, 2020, 08:50:44 PM]


My 1st rip of 2020! by luv2rip-fvp
[February 02, 2020, 07:12:36 PM]


recommend me a quad to learn on by badger
[February 01, 2020, 11:27:05 PM]

* Keywords
fpvhub  fpv hub
first person view video piloting

rc r/c r.c. model aircraft flight pilot fpv piloting wings fly flying flight fuse fuselage aileron tail pan tilt tx rx vtx rtx receiver transmitter video radio control controlled headtracker fpvuk bfpvmfa fpv uk first person view video piloting fpv servo servos easystar easy star multiplex antenna VR1400 fatshark video goggles 2.4 5.8 1.2 900 ghz mhz uhf panel antenna circular fpv polarised tracker dbi 10mw 100mw 500mw camera osd fpvuk bfpvmfa fpv first person view video piloting downlink ezantenna tracker gps EzOSD current sensor tiny telemetry autopilot ccd gopro kx131 kx171 FY21 FY21A FY21AP II IMU oracle diversity processor video switcher fpvuk bfpvmfa fpv uk first person view video piloting insurance simulator delta wing glider funjet quadcropter helis heli helicopter electric nitro scratchbuild scratch build batteries battery 2s 3s 4s lipo lipos fpvuk first person view video piloting Antenna fpvhub  fpv first person view video piloting rc r/c r.c. model aircraft flight pilot fpv Airframe Artifical Horizon Auto pilot Av AWG AWU Bec Brownout Buddy box C rating CG Circular Polarized Data logger Dbi Dbm Dipole Diversity DVR Easycap EPO EPP Failsafe FM Freshnel zone Frequency Gain Ghz Goggles GPS Ground Station Gyro Head Tracker HD Hz Inverted Vee Jst LC Filter Lipo LUX Mah Mhz Omni OSD Pan Patch Platform Polarization Rssi RTH Servo Spotter Telemetry Tilt Tracker Transmitter TVL Ubec UHF Video Splitter Vrx Vtx Watts Yagi  fpv uk first person view video piloting rc r/c r.c. model aircraft flight pilot fpv

http://www.fpvhub.com/forum/index.php?action=sitemap;xml http://www.fpvhub.com/forum/index.php?action=sitemap http://www.fpvhub.com/forum/index.php?action=sitemap;start=0 http://www.fpvhub.com/forum/index.php?action=sitemap;start=100 http://www.fpvhub.com/forum/index.php?action=sitemap;start=200 http://www.fpvhub.com/forum/index.php?action=sitemap;start=300 http://www.fpvhub.com/forum/index.php?action=sitemap;start=400 http://www.fpvhub.com/forum/index.php?action=sitemap;start=500 http://www.fpvhub.com/forum/index.php?action=sitemap;start=600 http://www.fpvhub.com/forum/index.php?action=sitemap;start=700 http://www.fpvhub.com/forum/index.php?action=sitemap;start=800 http://www.fpvhub.com/forum/index.php?action=sitemap;start=900 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1000 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1100 http://www.fpvhub.com/forum/index.php?action=sitemap;start=1200
* Disclaimer
The content, views and opinions expressed within this forum are those of the authors and do not necessarily reflect the views, official policy or position of FpvHub. However, we reserve the right to remove or edit any content considered inappropriate.