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Graham Dyer
  • Male
  • RPAS Pilot - Johannesburg. (ex-Safari Trails Guide)
  • South Africa
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Graham Dyer's Groups

Graham Dyer's Discussions

APM:Plane, odd warning sound - no messages?

Started this discussion. Last reply by Grant Morphett Aug 9, 2015. 18 Replies

APM 2.5 suddenly lost ability to connect via USB or Telem

Started this discussion. Last reply by Pavel Sorejs Feb 9, 2015. 1 Reply

 

Graham Dyer's Page

Latest Activity


Moderator
Graham Dyer replied to Wes's discussion Effects of frame design on barometer performance ( and all other non 3.3 specific AC questions)
"Is GPS altitude so bad that it can't be used to correct this drop in altitude in the short term?"
yesterday

Admin
Gary Mortimer replied to Graham Dyer's discussion Pilot's wanted in the group South African DIY Drones User Group
"Have you put this up on the Drones South Africa FB page ?? https://www.facebook.com/groups/dronessa/"
Thursday

Moderator
Graham Dyer replied to Graham Dyer's discussion Pilot's wanted in the group South African DIY Drones User Group
"Still looking for applicants, please email me: graham@uavdronesolutions.com"
Thursday

Moderator
Graham Dyer replied to Luke Horwood's discussion Skywalker 2015 - Assymetric turning in AUTO Mode resulting in tip stalls in the group ArduPlane User Group
"You could also try more up aileron than down aileron movement. I had this recently on a Radian, changed the up aileron movement to 120% and down movement to 40% with 30% aileron/rudder mix, now it turns both ways very well."
Jan 29

Moderator
Graham Dyer replied to Graham Dyer's discussion Pilot's wanted in the group South African DIY Drones User Group
"Not essential but would be an advantage, Gary, otherwise we'll train and put through school to get their RPL's like we've had to do. RPL's are a bit scarce in SA and only 3 companies have their ROC's apparently."
Jan 23

Admin
Gary Mortimer replied to Graham Dyer's discussion Pilot's wanted in the group South African DIY Drones User Group
"I guess you will be looking for folks with RPL's Graham?"
Jan 23

Moderator
Graham Dyer added a discussion to the group South African DIY Drones User Group
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Pilot's wanted

We're looking for RPAS pilots to operate drones in the Southern African bush.Fixed wing flying experience helpful as is APM:Plane/Pixhawk Autopilot experience, some mechanical ability and to be able to live and work remotely. Paid positions with full board.…See More
Jan 23
Kiruthi Murugan replied to Graham Dyer's discussion APM:Plane - external compass not reporting?
"I too have the same problem. I bought a new pixhawk and 3dr compass and gps. However I performed it not on the plane but on ground. No heavy magnetic field was there nearby. I was able to calibrate the external compass. However the external compass…"
Jan 20
Kiruthi Murugan replied to Graham Dyer's discussion APM:Plane - external compass not reporting?
"I too have the same problem. I bought a new pixhawk and 3dr compass and gps. However I performed it not on the plane but on ground. No heavy magnetic field was there nearby. I was able to calibrate the external compass. However the external compass…"
Jan 20

Moderator
Graham Dyer commented on Thomas J Coyle III's blog post Bird-repelling drone imitates a real-life predator to clear property of unwelcome pests
" vs Are the birds going to be fooled? "
Jan 19

Moderator
Graham Dyer replied to andi azhar's discussion Tricopter Yaw Motor Level and motor position for apm
"1) How is your CG? Sounds like it's maybe nose heavy, more weight on the two front motors? 2) Yes, while it may not be the most efficient you can use any combination of CW or CCW props on a tricopter as the tail prop controls yaw."
Jan 17

Moderator
Graham Dyer replied to Darius Jack's discussion VTOL Copter Plane Catamaran Hybrid in the group ArduCopter User Group
"My opinion: "We're not quite there yet" Batteries - need triple or quadruple the energy density that we have now for the same weight. Carrying multiple cameras, gimbals, motors, batteries, transmittors, ESC's, etc, draws a lot…"
Jan 17

Moderator
Graham Dyer replied to yosi dudu's discussion Combining guided mode and auto mode
"Yup, 'Resume Mission' is the button. However, does that switch back into Auto? I'd much rather just hit Auto and know that I'm back in that mode."
Jan 17

Moderator
Graham Dyer replied to yosi dudu's discussion Combining guided mode and auto mode
"As soon as you hit Auto after Guided mode the plane will go to 5 unless you click Restart Mission"
Jan 17

Moderator
Graham Dyer replied to Abolo's discussion How to Limit Roll & Pitch stick movement Angle ?
"Is the plane sensitive in FBW-A or just in Manual? FBW-A is the mode that checks and tests should be done because the FC uses that mode plus GPS when in any Auto mode When you do your radio calibration the FC uses those values in conjunction with…"
Dec 27, 2015

Moderator
Graham Dyer replied to Abolo's discussion How to Limit Roll & Pitch stick movement Angle ?
"Most modern transmiters have an EPA function, (End-Point-Adjust), you can limit your throws with that or mechanically by manipulating the servo horn/control surface horn holes. You have not given any other information like flight controller used or…"
Dec 27, 2015

Profile Information

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

Now I'm a RPAS Pilot working on various projects. BVLOS mostly, day and at night. 320 hours logged and 14668km as of end Mar '15. Did 114km total distance in one flight 2014, as well as 02h17m with a 3kg electric plane.
Please tell us a bit about your UAV interest
Personal: DIY Carbon H-frame QuadCopter with 250+ flights, APM2, 3DR Telemetry, Sunnysky X2212-980 motors, 11x4.7 carbon props, 2200/5000mAh 3S Turnigy Batts, 15 minute flight time, Sony 520TVL camera, 1.2GHz 700mW Video Transmittor + inverted Vee antenna, Video goggles & 9" Dvd monitor.

DIY FPV folding carbon Tricopter - XUAV-X2 (AUAV.CO) powered (300mm width, 3DR Telemetry, Sunnysky X2212-980 motors, 10x4.7 carbon props, 2200/5000mAh 3S batts

Twin boom FPV 1.75m plane for long distance Nav & FPV. APM2.6, 60+ flying hours.

Old: Own design & built twin-boom UAV Plane (R.I.P.)
ArduPilot v2.7.1, ArduIMU, MediaTek GPS. Had clocked 70+ hours flying time.

Slowstick - ArduPilot Legacy v2.6.2, APM2560 + Thermopiles, was used for FPV and as a stabilized trainer.
Hometown:
Randburg, Johannesburg, South Africa

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Graham Dyer's Blog

RC Electric Calculator App for Android

Posted on September 3, 2015 at 12:54am 17 Comments

RC Electric Calculator App for Android - version 3.0 is coming out shortly with many improvements and some calculations…

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Prop testing on a 'copter

Posted on April 18, 2014 at 9:43am 18 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…

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ArduPilot formation flying revisited

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

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

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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…

Continue

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…

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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, Vikram said…
have u got success in reversing ur aileron ... i m using same setup with XY sensors
At 2:12am on August 21, 2009, Vikram 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, Vikram said…
so u must have tried #define ROLL_REVERSE 1 , then nothing happened ... am i right..
At 3:08am on August 21, 2009, Vikram 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_1(90+roll);
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.
so
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

GARTH
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.

Gerrit
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

0733000337
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,
Regards
bruno

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 (www.motmen.com)

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