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Graham Dyer
  • Male
  • RPAS Pilot - Johannesburg. (ex-Safari Trails Guide)
  • South Africa
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Moderator
Graham Dyer replied to Randy's discussion Copter-3.3 beta testing
"If I recall correctly WPNAV_UP and _DN used to control the climb rate in althold, this no longer seems to be the case in v3.3, what controls it now?"
yesterday

Moderator
Graham Dyer commented on Graham Dyer's blog post RC Electric Calculator App for Android
"Cool Gary, downloaded. @Guy, I will consider that, this app was intended for electric RC flyers in general rather than drone flyers (which is a more niche than the RC guys). Maybe a separate app for surveys, aerial photos, grids, etc and keep the…"
yesterday

Admin
Gary Mortimer commented on Graham Dyer's blog post RC Electric Calculator App for Android
"I'm going to muscle in Graham, I have a work in progress app that has my South African airspace map baked in, Android and free https://play.google.com/store/apps/details?id=com.app.p2547IJ&hl=en adding other airspace and changing…"
Thursday
Guy McCaldin commented on Graham Dyer's blog post RC Electric Calculator App for Android
"Nice work Graham.  It's on a bit of a tangent, but have you thought about adding survey tools in?  e.g. Flight time + camera specs + target ground resolution + % overlap > estimated survey area.  Possibly pixels on target and…"
Thursday

Moderator
Graham Dyer commented on Graham Dyer's blog post RC Electric Calculator App for Android
"Pleasure, let me know if you have any suggestions for the v3.0 release."
Thursday

100KM
Hein du Plessis commented on Graham Dyer's blog post RC Electric Calculator App for Android
"This is going to be so useful, bought, thanks!"
Thursday

Moderator
Graham Dyer commented on Graham Dyer's blog post RC Electric Calculator App for Android
"Ok, done a bit of work on this, this is the new calculation screen that will be available in the v3.0: "
Wednesday

Moderator
Graham Dyer replied to Randy's discussion Copter-3.3 beta testing
"First practically trouble-free flight with v3.3rc10, an AUAV-X1 flight controller on a small carbon tricopter. I did notice however that I could arm and fly without a GPS lock at all despite ARMING_CHECK set to 1 (enabled), is this normal?"
Wednesday

Moderator
Graham Dyer commented on Nick Arsov's blog post AUAV-X1 , a new vision of the PX4 autopilot
"No worries, my X2 is on it's way but not here yet."
Wednesday

Moderator
Graham Dyer commented on Nick Arsov's blog post AUAV-X1 , a new vision of the PX4 autopilot
"No, talking about the X1, (this is the X1 thread :)). SD card at the bottom and LEDs up. From Nick Arsov: "Yes, our X1 needs Roll 180 if you want it with LEDs upside""
Wednesday

Moderator
Graham Dyer replied to leonardthall's discussion Calling all Tri-Copter pilots
"First quick flight in gusty conditions with v3.3rc10 directly after setup with a AUAV-X1 flight controller on a small carbon tricopter. No problems encountered except for a persistent compass variance error which required COMPASS_ORIENT2 to be set…"
Wednesday

Moderator
Graham Dyer commented on Nick Arsov's blog post AUAV-X1 , a new vision of the PX4 autopilot
"AHRS_ORIENTATION has to be set to 8 (Roll180) on this board, it seems that COMPASS_ORIENT2 has to also be set to 8 (Roll180). I kept getting Error Compass Variance with ACv3.3rc10 until I changed that."
Wednesday

Moderator
Graham Dyer replied to Jacques Eloff's discussion Question - Recording of Home Point on Powering Up in the group ArduPlane User Group
"As I understand it the firmware won't allow arming without a solid 3D GPS lock, this can take some time when moving to a new location. The little button cell on the GPS is there to do a warm start so that the GPS normally finds it's…"
Aug 30

Moderator
Graham Dyer commented on keeyen pang's blog post 100KM Challenge
"Well done! Welcome to the club :)"
Aug 29

Moderator
Graham Dyer replied to leonardthall's discussion Calling all Tri-Copter pilots
"Wow, so does that mean all tricopters have had their throttle limited to 80% and have no stability patch?"
Aug 29

Moderator
Graham Dyer replied to Randy's discussion Copter-3.3 beta testing
"The 80% rule applies to capacity, not c-rate (http://www.tjinguytech.com/charging-how-tos/80-rule) and has been a long standing recommendation to make LiPo's last. The main rational behind it is that each cell in a pack discharges at a slightly…"
Aug 28

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 professional RPAS Pilot. I fly drones 40-120km, both day and at night, 7 days a week on a special project. 320 hrs and 14668km as of end Mar '15.
Please tell us a bit about your UAV interest
DIY Carbon H-frame QuadCopter with 200+ flights (40+ flying hours), 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 googles & 9" Dvd monitor.

DIY FPV folding carbon Tricopter - XUAV-X1 (Arsov) powered (300mm width)

Twin boom FPV 1.75m plane for long distance Nav & FPV. APM2.6, 20+ 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, 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 16 Comments

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

Continue

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…

Continue

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…

Continue

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…

Continue

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_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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