Graham Dyer
  • Male
  • UAV/UAS Pilot - Johannesburg. ex-Trails Safari Guide, Mala Mala Game Reserve,
  • South Africa

Graham Dyer's Friends

  • ChavAnd
  • Yan Ma
  • Steve Stark
  • pma_
  • Mike
  • Edson Moura
  • Spyros
  • Quadzimodo
  • Tyrell John
  • Riaan Vermeulen
  • Ashur Gelyana
  • MA
  • paul riseborough
  • Byron
  • Shaun Mileson

Graham Dyer's Groups

Graham Dyer's Discussions


Graham Dyer's Page

Latest Activity

Graham Dyer replied to Yan Ma's discussion Visual Tracking Gimbal Control
"It's a pleasure! Our use would be for anti-poaching, we could track a car or animal or poacher without having to fight with controlling our gimbal with a joystick in heavy winds. So ours is just one example of a use for good..."

Graham Dyer replied to Yan Ma's discussion Visual Tracking Gimbal Control
"Brilliant! There are so many professional and amateur uses for this it's hard to believe it hasn't been done in this way before. we could have used it to great benefit for the last 18 months!"
Feb 24

Graham Dyer replied to Ondřej Procházka's discussion APM Plane oscillating on upwind legs
"We're running NAVL1_DAMPING at 0.8 and NAVL1_PERIOD at 19 on a similarly sized plane an our tracking is very straight. As mentioned you might want to set your airspeed up a bit to 13m/s too. I assume you've run autotune and are using the…"
Feb 20
Pavel Sorejs replied to Graham Dyer's discussion APM 2.5 suddenly lost ability to connect via USB or Telem
"Happened the same to me. Most likely the UART MUX is destroyed. This chip On my APM, also the UART on 32u2 died, but after replacement of the MUX, at…"
Feb 9
Tom Pittenger replied to Graham Dyer's discussion Altitude from baro or GPS? (APM:Plane)
"I'm having a similar problem trying to do auto-landing with long flights. @Graham, what mix ended up working best for you?"
Feb 2

Graham Dyer replied to Euan Ramsay's discussion Best tricopter layout
"The one just uses an opposite direction prop, either works fine as the tail rotor will offset the torque."
Jan 29
Michael Visser replied to Graham Dyer's discussion Spin on / quick release / self locking prop adapters?
"Joe, you've got a 3-mount adapter, you'll need a 4-mount adapter and check your spacing as it needs to match exactly (e.g. 10mm mount spacing won't fit a motor with 12mm mount spacing). I'm using Turnigy Multistar 2814-700Kv…"
Jan 25

Graham Dyer replied to Mike J's discussion Mission Planner Feature Request for AP
"You can underlay video on the HUD if that helps?"
Jan 18
Joe Dietrich replied to Graham Dyer's discussion Spin on / quick release / self locking prop adapters?
"Here is this kind.  Crazy though, it has three holes, not four.  I don't see how the heck that will bolt to any existing 4-hole motor.   Maybe I'm missing…"
Jan 16

Graham Dyer replied to Graham Dyer's discussion Spin on / quick release / self locking prop adapters?
"Something like these but for APC or other types of prop "
Jan 15

Graham Dyer replied to Graham Dyer's discussion Spin on/quick release prop adapters?
"Hi Joe, I'm looking for something without any separate screws, like these: and these…"
Jan 15
Joe Dietrich replied to Graham Dyer's discussion Spin on/quick release prop adapters?
"In the video, it appears there is a black adapter below the prop (above the bronze colored, top piece of the spin-on quick release).  The black adapter probably has either two or four screws to holding it to the bronze colored quick release.…"
Jan 15

Graham Dyer commented on Mark Williams's blog post Replacing the voltage regulator on an APM board
"Nice work, now how about a 'how to' video for the 32U2 mux chip? :)"
Dec 30, 2014

Graham Dyer replied to Bernie Liskov's discussion 3 problems with mission planner
"Have a look here regarding the columns: as well as: hopefully it'll be fixed in the next release. You can add your screenshots to the…"
Dec 29, 2014

Graham Dyer replied to Patrick Leschinski's discussion 915MHz Telemetry cuts out... any ideas?
"Excellent Patrick, glad you got it sorted."
Dec 29, 2014

Graham Dyer replied to Bernie Liskov's discussion 3 problems with mission planner
"Post your mission txt file here, also put up some screenshots of the column problem. (P.S. I've moved this discussion into the APM Mission Planner category)"
Dec 29, 2014

Profile Information

About Me:
I worked as a Safari Trails Guide (Lead Rifle) and Ranger and guide in the South African Wildlife Tourism Industry for about 20 years.

Now I'm a professional UAS/UAV/RPAS Pilot. I fly drones 40-120km, both at day and at night, 7 days a week on a special project. 120 hrs and 4673km as of end Nov '14.
Please tell us a bit about your UAV interest
DIY Carbon H-frame QuadCopter with 200+ flights (25+ flying hours), APM2, 3DR Telemetry, 20-22L motors, 12x3.8 carbon props, 5000mAh 3S Turnigy Batts, 15 minute flight time, Sony 520TVL camera, 1.2GHz 700mW Video Transmittor + inverted Vee antenna, Video googles & 9" Dvd monitor.

New carbon Tricopter

Twin boom FPV 1.75m plane for long distance Nav & FPV. ArduPilotMega1 v2.65, 4+ flying hours.

Old: Own design & built twin-boom UAV Plane (now RIP)
ArduPilot v2.7.1, ArduIMU, MediaTek GPS. Had clocked 50+ hours flying time.

Slowstick - ArduPilot Legacy v2.6.2, Thermopiles, Used for FPV and as a stabilized trainer.
Randburg, Johannesburg, South Africa

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Graham Dyer's Blog

Prop testing on a 'copter

Posted on April 18, 2014 at 9:43am 16 Comments

I wanted to do a few real world hover tests with different prop sizes to satisfy my curiosity.

I tested 3 sizes of some commonly used props, the RCTimer Carbon 10x4.7, 11x4.7 and 12x3.8, all carefully balanced. There are other very similar props branded differently.

The 'copter is a carbon…


ArduPilot formation flying revisited

Posted on April 14, 2014 at 11:29pm 10 Comments

Further to our first attempts at fully automated formation flying (see…


Another 100km+ flight

Posted on February 11, 2014 at 4:00am 33 Comments

Went for our long distance flight attempt today, flew a test flight with a 6S 2600mAh LiPo and then put in the 18650 batteries in, the log unfortunately shows both flights as I forgot to reconnect so I have calculated the time and total distance from the launch of the second flight to the…


Finwing Air Titan

Posted on February 6, 2014 at 11:30am 17 Comments

Looks like a good fpv/camera ship for long distance flights with…


ArduPilot formation flying attempt

Posted on January 7, 2014 at 1:00am 12 Comments

We tried some formation flying with 2 different APM equipped planes.

Both were loaded with AP v2.76 and the same exact mission except for the chase plane flying 20m higher than…


Comment Wall (16 comments)

At 5:52am on July 24, 2009, Robert Hannaford said…
Hi Graham,

Please give me aring when you get a chance, Rob Hannaford 011 781 4029, 0733000337
At 5:43am on August 20, 2009, viky said…
have u got success in reversing ur aileron ... i m using same setup with XY sensors
At 2:12am on August 21, 2009, viky said…
i think i can correct it but want a clear view ur ailerons r reversed in automode or manual mode. If its auto change is to be done in the code else it has to be reversed using RC remote... let me know whats exactly it is
At 2:40am on August 21, 2009, viky said…
so u must have tried #define ROLL_REVERSE 1 , then nothing happened ... am i right..
At 3:08am on August 21, 2009, viky said…
actually the same problem i had faced but my elevator movement was reversed
in autopilot so i tried to correct it by #define PITCH_REVERSE
but nothing happened later i found thaT this header is not at all used inside code so i just follow the logic in code and got the line to reverse the motion of either aileron or elevator in ... void pulse_servos(int roll, int pitch) //Normal mode
pulse_servo_2(90-pitch); //invert sign if you want to reverse the servo...

This is what i had changed then to work it well.
I did few tests and got semi success in few , hopefully i can make it this time atleast 80% success with little changes in trim as u recommended in ur blog failure and success.
Its very nice blog i will try to write the one ... it really helps ourselves and others
At 2:49am on August 24, 2009, Garth said…
Graham please contact me
021-7827148 or 0827708200

At 4:41am on March 11, 2010, Cronselaar said…
Hi, this must sound stupid, but how do you get the nice line logs in GE... My current position just constantly changes. I'm using a E406. I can't seem to get the right altitude data in the GS2 either.. Any help would be appreciated.

At 9:58am on August 17, 2010, Robert Hannaford said…
Hi Graham, won't you please send me you cell no I have lost it, Regards Rob Hannaford

At 8:08am on October 17, 2011, bruno voisin said…

Hi Graham, this is Bruno from Cape Town. 

These are my first steps in the UAV world, and I am interested in building a ArduCopter to conduct game counts in a nature reserve.  Any advice / recommendation would be most appreciated.

Thanks in advance,

At 1:31am on November 7, 2011, Robert Dielenberg said…

Hi Graham,

we're developing a UAV here in Newcastle, Australia. We've been experimenting with the ardupilot 2_7_1 for a few months. Having huge problems with altitude hold and throttle. We're using a petrol engine. We realize the original ardu is for electric. It seems there is not much data on petrol engines for ardu. We had a crash last week and lost the plane. We're going to rebuild the code from scratch and simplify it. Will get back on to you on our progress. Cheers,


Rob Dielenberg, MotMen UAV (

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