Monday, August 31, 2015

Analysis Paralysis

Whenever I approach a new topic that I have no experience with previously, I tend to research it carefully.  Certainly the world of UAVs demands that you educate yourself and act responsibly.  The majority of UAV crashes and incidents can be attributed to pilot error.

I try to understand as much of the underlying technology as I can to create a good knowledge base from which to work.

So, in an effort to educate myself on this topic and discipline, I have used 2 resources:

The internet
A local UAV retailer

First up is the internet.  Everything you need to know is out there.  You just need to separate the wheat from the chaff.  With that in mind, I offer these found resources that were very useful in my research.

Let's start at the beginning.  How does a helicopter work?

https://www.youtube.com/watch?v=WdEWzqsfeHM&list=PLNbXXMoWfR3Bf7Z77vcviPlkHtTXUlEpC

Here is an excellent series on flying a model helicopter:

https://www.youtube.com/watch?v=yeUTh3iWRec

OK, now let's get quad specific...

Quad flight school:

http://quadcopter101.blogspot.com/2013/10/chapter-1-introduction-to-quadcopters.html

Lessons and resources:

http://myfirstdrone.com/
http://www.phreakmonkey.com/2014/12/beginners-guide-to-flying-quadcopter.html
http://www.dronethusiast.com/quadcopter-beginners-guide-learn-to-fly-drones/
http://www.tested.com/art/makers/459457-joining-quad-squad-how-get-started-rc-quadcopters/
http://www.realflight.com/basic/basic-aircraft.html
http://www.inspirepilots.com/threads/understanding-compass-and-magnetic-fields.3742/

LiPo (the battery of choice for the R/C world):

http://multirotorforums.com/threads/understanding-lithium-polymer-batteries.12072/

General forums for reading and asking questions:


And a couple of DJI Inspire 1 sites:


And, while this might be a bit pre-mature for you, here is a set of pre-flight checklists for the DJI Inspire:

http://www.dronefrontier.com/inspire1checklist
http://www.inspirepilots.com/resources/categories/dji-inspire-1-downloads.1/

MY NOTE:

Quad calibrations should be done away from:

Any metal objects (fence, car etc)
Do not wear a watch
Do not do around cell phone

A final note - check your surroundings for power lines/ cell towers or any other items that might be an issue

----------------------------------------------------------------------------------------------------------
Make Sure Batteries Are Fully Charged in Both TX and A/C
Verify Mode P/A/F
Put phone and tablet in flight mode
Power On TX
Power On A/C
Load DJI App
Exit Storage Mode via the app
Power Off A/C
Attach Camera
Check memory card is inside the camera
Install Props & Prop locks when we get them.
If winter set outside for a few minutes to get Acculamated to Temp.
Power On A/C
Check For cleanest Channel?????
Calibrate Compass
Check IMU Calibration .99 - 1.01
Set Fail Safe Height
Set RTH For A/C or TX
Point Antennas Correctly on TX
Power up motors if in winter to allow motors to warm up for a minute or so.
Then enjoy your flight
----------------------------------------------------------------------------------------------------------
PRE-LOCATION
• Batteries / tablet charged
• Firmware current
• Calibrate RC
• Confirm desired RC mode
• Memory card cleared

ON LOCATION
• Disable wifi on tab and airplane mode phones
• Prop locks / tighten props
• Calibrate your compass
• Calibrate your IMU (if readings are off)
• Give GPS a moment to lock in
• Properly position antenna
• Confirm RTH settings
• Confirm fail safe height
• Liftoff to 2-3 ft and watch behavior (steady, or drifting)

MISC
• Camera settings
• Check weather
• Plan flight route
• Be aware of surroundings.
• Allow unit to acclimate, then motors to warmup (cold weather)
• Always be prepared GPS loss
• Stay within line of sight
----------------------------------------------------------------------------------------------------------
Weather:
Wind below 20mph?
If below 40 F, use battery foam
Physical inspection:
SD card
Inspect bird and props
Install camera
Install props
Install prop locks
Prepare iPad:
Close all other apps
Open DJI Pilot
Cache maps for flight
Airplane Mode on
Verify TX switches:
Flight mode switch
Landing gear down
Power TX
Power aircraft:
Monitor status check and warm up LED indicators
Calibrate compass
Check IMU MOD levels:
Gyro: 0
Accel: .99-1.01
Comp: 1400-1600
When was last TX calibration?
Lift off to 6 ft hover:
Verify stable hover
Verify all controls are responsive
Landing gear up
----------------------------------------------------------------------------------------------------------
PRE FLIGHT CHECK LIST

1______CHOSE A GOOD TAKE-OFF LANDING PLACE

2______CHECK PROPS

3______CHECK CAMERA FILTER

4______TURN ON REMOTE CONTROL - APP TURNS ON

5______CHECK TABLET BATTERY LEVEL

6______TURN ON AIRPLANE MODE ON TABLET / CONFIRM

7______FLIGHT MODE SWITCH IN P POSITION ON REMOTE ( P - ATTI)

8______TURN ON INSPIRE

9______TURN ON PILOT APP – CONFIRM BASICS ON SCREEN

_______FLIGHT MODE (P-ATTI)

_______AIRCRAFT BATTERY CHARGED

_______RC BATTERY CHARGED

10______CALIBRATE COMPASS

11______CONFIRM GPS CONTROL

_______APP SCREEN - SATELLITE BARS FULL

_______APP SCREEN – SAFE TO FLY (GPS CONTROL)

_______INSPIRE REAR LIGHT BLINKING GREEN

12______CONFIRM GIMBAL MODE ON APP (FOLLOW, for me)

13______MAP CHECK – AIRPLANE ICON AT HOME BASE?

14______CHECK AND CONFIRM CAMERA SETTINGS

15______STAND BEHIND INSPIRE (this helps me)

16______TAKE OFF – HOVER – FINAL CHECK OF BATTERY LEVELS, GPS CONTROL

17______RAISE LANDING GEAR

18______FLY SAFELY, SHOOT. CONSTANT BATTERY CHECK – ALLOW TIME TO RETURN
----------------------------------------------------------------------------------------------------------

OK, in the next post I will talk specifically about my conclusions based on the research I have done as well as my experiences with a local UAV retailer.

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