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Graham Dyer
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  • UAV/UAS Pilot - Johannesburg. Trails Guide, ex-Sabi Sands Game Reserve,
  • South Africa
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Moderator
Graham Dyer commented on Trent at MyGeekShow's blog post Emergency Auto Landing - APM saves sUAV
"Cool stuff, never heard anyone get so excited that their plane landed safely, lol Trent, on a Hitec Aurora 9 I get about 2.4km (7800ft) range without my 1.3GHz VTx (on 1040MHz), about 800m (2600ft) with the VTx on and that's with a lowpass…"
50 minutes ago

Moderator
Graham Dyer replied to Randy's discussion ArduCopter-3.1 released!
"Normally all the saved parameters will be carried over in a minor upgrade unless the devs say they won't, but of course it's always good to save or backup your parameters before every upgrade anyway."
1 hour ago

Moderator
Graham Dyer commented on Andrew Tridgell's blog post APM:Plane 3.0.0 released
"Just a repeat of the thanks to the guys who made this possible and once again for all the work that went into this. We flew a couple flights today with our problem child and I'm very pleased to report that there is nothing untoward to…"
1 hour ago

Moderator
Graham Dyer commented on Graham Dyer's blog post ArduPilot formation flying revisited
"No idea, we'll attempt it on our next outing to see if it functions for fixed wing."
yesterday

100KM
Trung Nguyen commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Graham, the Swarming wiki appears to be written for MR. Do you know if there is any reason it would not work for fixed wing? I wonder what the update frequency is for the "leader's" position and subsequent followers' guidance…"
yesterday
Antonie Kruger commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Hi Graham, that was great, at the Vaal, nogal. Thanks for sharing, great video."
yesterday

Moderator
Graham Dyer commented on Graham Dyer's blog post ArduPilot formation flying revisited
"@Gagarien, yes, north eastern edge of the Vaal Dam."
yesterday
Martin Peres commented on Graham Dyer's blog post ArduPilot formation flying revisited
"@Graham: Sweet, I didn't know this feature existed already!"
yesterday

Moderator
Graham Dyer commented on Graham Dyer's blog post ArduPilot formation flying revisited
" Thanks guys, it was quite a bit of fun. @Trung we're using two laptops and two telemetry radio's on 433MHz but with different ID's so there does not appear to be any interference. @Martin: there is the little known…"
yesterday
Martin Peres commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Avoiding collisions like that couldn't be handled easily by using the telemetry link. Planes should broadcast their GPS location. Then every plane around should try to keep a distance of at least 10m between every other plane. To avoid…"
yesterday
Felixrising commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Very cool!"
yesterday

100KM
Trung Nguyen commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Looks like fun Graham. How are you handling telemetry with the two planes? Can MP monitor both? Are you on the same frequency, and if so, do they interfere?"
yesterday
Gagarien commented on Graham Dyer's blog post ArduPilot formation flying revisited
"Nice Graham love it!, is that the Vaal ? "
yesterday

Moderator
Graham Dyer replied to Charosenz's discussion Batt FS triggering too soon, any ideas appreciated
"The voltage should be set at 10.5v for a 3 cell LiPo, 9.8v is already in the part of the voltage curve that is dropping very rapidly and you will not have much power left. Typically you won't be able to stop a descent if the battery is at…"
yesterday

Moderator
Graham Dyer posted a blog post

ArduPilot formation flying revisited

Further to our first attempts at fully automated formation flying (see http://diydrones.com/profiles/blogs/ardupilot-formation-flying-attempt), Phil (http://diydrones.com/profile/PhilRudram) with his rebuilt Valdez (v2) and I headed out to try again.Most of the flights were really good with the two planes following the route (and each other) very well. The…See More
yesterday

Moderator
Graham Dyer replied to Randy's discussion ArduCopter-3.1 released!
"@TheMightyThor: Drift and Hybrid Loiter are very different, drift is flying with a single stick, roll and yaw are added in a turn to almost feel like you're oversteering or skidding in a turn, or in other words the turn is coordinated…"
yesterday

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 UAS/UAV/RPAS Pilot.
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.

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.
Hometown:
Randburg, Johannesburg, South Africa

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Graham Dyer's Blog

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…

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Another 100km+ flight

Posted on February 11, 2014 at 4:00am 35 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…

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Finwing Air Titan

Posted on February 6, 2014 at 11:30am 13 Comments

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

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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…

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Testing a cheap(ish) brushless gimbal...

Posted on August 14, 2013 at 11:18am 19 Comments

Been testing a brushless gimbal on my quad, it's an own-design laser-cut Liteply gimbal which uses a Foxtech AIO (Martinez) controller…

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Comment Wall (14 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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