Gareth Rens
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  • Johannesburg
  • South Africa
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Gareth Rens's Groups

Gareth Rens's Discussions

HIL firmware not downloading on latest mission planner

Started this discussion. Last reply by Craig Elder Apr 11, 2014. 1 Reply

Hey everyone, I'm trying to flash my pixhawk with the latest hil apm plane firmware but I'm getting the following error...Screenshot of error attached.Thanks for the help :)GContinue

Pixhawk orientation issue

Started this discussion. Last reply by Ben Dellar Apr 6, 2014. 1 Reply

Hey everyone!My name is Gareth and im busy setting up a sky hunter for photogrammetry.Plane is assembled and test flown. She flies like a dream in manual mode. The skyhunter doesnt have a rudder, so…Continue

MikroKopter Oktokopter Carbon Fibre base plates for sale or to swap

Started this discussion. Last reply by Don LeRoi Jun 22, 2012. 1 Reply

For sale or to swap for WHY?$20…Continue

UAV for photogrammetry / surveys

Started this discussion. Last reply by Towab Muhammad Yusuf on Monday. 54 Replies

Hi EveryoneIm putting together a UAV for aerial surveying using stereo photogrammetry.Id like to get some input for the experts before going ahead.My plan is to buy a high wing trainer coupled with…Continue

 

Gareth Rens's Page

Latest Activity

Towab Muhammad Yusuf replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"You find any solution?"
Monday
Walter Volkmann replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"For mapping you need a small quad and something like the Samsung NX1000 with a 16mm lens. No need for a gimbal! Since you are in South Africa, consider steadidrone.com equipped with APM2 or Pixhawk. This platform has a wide user base (for support)…"
Saturday
wrostek replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Hi Duffy I couldn't succeed with my first test flights. Then I stepped back to the ground. Here I could do larger series of setup combinations. From within my car I tested with similar speed and distance. Lower shutter speed did not make…"
Feb 19
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Hi Wolfgang,  Why did you have to shoot at 1/4000?  I wonder if the problem was with vibrations and set of the aircraft rather than required shutter speed at that altitude/speed and lens  Thanks"
Feb 19
wrostek replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Hi Duffy I did a few tests with a rented A7R on my Skywalker last November. Zeiss 2.8/35mm, 90m AGL, 15m/s. Great pictures but I had to go for 1/4000s or higher. Not scientific work but for this resolution a cam with only 1/4000s may not be…"
Feb 18
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Arga,  Yes, it is ~1 frame per second, we currently use IR and obtain more than enough "vertical overlap", the side-lap is strictly kept at 70-75%, although we will be testing the setup at 18m/s because of the benefits on…"
Feb 18
arga firmansyah replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"With 35mm focal length, 120m agl and 20m/s speed, would it be 1 frame per second or even lower? Are you using ir or usb trigger? Have you tried the zoom lens set at 35mm instead of prime lens?"
Feb 18
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Wayne,  Most of the applications we tried the A7-35mm lens combo where for environmental surveys. So we have done coastal erosion work (volumetric and mapping analysis of sand dunes) and similar habitats, as well as analysis for forestry.…"
Feb 18
Wayne Upfold replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Hello Duffy, I have heard similar before, what sort of surveys are you doing size etc and altitude. I have considered going 35mm but would have to fly too high. What processing suit are you using and calibration software.  "
Feb 18
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"What we found was a step improvement in quality of model reconstruction when moved from using the NEX5 with a 24mm equivalent to the A7 with a carl zeis prime 35mm lens. Also the very old EOS 350D performed good too."
Feb 18
Wayne Upfold replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Arga I have been using an a 5000 for about 6 months now, it is a good camera, Im using a 24mm sony lens. The camera we still use the most and you will be very surprised to hear this is an eos m,  we do stockpile volumes for corporate clients,…"
Feb 17
arga firmansyah replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Has anybody using sony alpha 5000 or 5100 for aerial photogrammetry survey? Very interested hearing your experience on those camera. Sony5100 has 24.3 mp, 4mp higher than alpha 5000, but will it have significant difference?"
Feb 15
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Spot on Gary."
Feb 15

Admin
Gary Mortimer replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"Er and your point is Duffy? This is a very old thread to come back alive in new easier times."
Feb 15
Duffy replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"We get 1h 30mins with 1kg of payload using the Raptor E1"
Feb 15
ReconJohn replied to Gareth Rens's discussion UAV for photogrammetry / surveys
"G In the same boat as you . Thought Ihad the platform (durafly Sky Mule , did the flight time maths on the RTF set up and got an answer of 6mins flight time so back to the Bixer 3 I think. "
Feb 14

Profile Information

About Me:
I am a patron of the Sciences
Please tell us a bit about your UAV interest
I am interested in anthing that has switches, buttons, gears or knobs...
I run a local south african drone forum: sadrones.co.za
And have started an aerial photography company called RAD Aerial Photography. We Also sell multi-rotors on www.stuffinc.co.za
Hometown:
Vereeniging, Gauteng

Gareth Rens's Photos

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Gareth Rens's Blog

Worlds smallest One-man Helicopter

Posted on June 30, 2012 at 12:49am 8 Comments

RAD Aerials first video edit

Posted on June 6, 2012 at 12:44am 6 Comments

Not too bad for my first edit. Used premier (my first time)

Tried uploading it to vimeo for copyright reasons, but no go.

So I uploaded to you tube. The only country that its blocked in is…

Continue

APM2 conversion to Naza

Posted on May 27, 2012 at 12:06am 38 Comments

Morning everyone!

So i decided to try the whole Dji thing. It took all of about 20mins to swop the APM2 with the Naza.

The setup is as simple as it gets. That took no more than 10 mins.

After installing the hardware and software I took it outside and attempted the first flight.

All I have to say is wow! A truly awesome…

Continue

Comment Wall (4 comments)

At 6:01pm on January 13, 2012, John Campen said…

Thanks for your help on the fail safe setting Gareth. I see that this was updated last week on the wiki document page for fail safe by Jason, but he has entered the same value for two functions for TH_FS_ACTION as value 1 which i think is an error. The two functions are either to reinstate the origination mission once signal is restored or to RTL even if connection is restored. I have got mine now set at 1 for both THFS and THFSA but Im yet to know what it will active if ti kicks in. Do you what are the correct values for THS ACTION?

At 11:26pm on January 13, 2012, Gareth Rens said…

Iv pm'd Jason to ask about the typo.

Testing is fairly easy. Arm the copter without props (needs to have GPS lock)

Run up the motors in STAB mode and turn the transmitter off. If the motors die, the failsafe didnt work.

You can also see if it works in APM planner if you connected via xbee. The mode will change from STAB to RTL if you turn off the transmitter.

G:)

At 11:44pm on January 13, 2012, Gareth Rens said…
At 11:05pm on January 24, 2012, nick said…

Gareth, I missed your message a couple of minutes ago but I am back on now.

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