About

Gender

Male


About Me:

I am a Professor teaching Physical Geography at Newcastle University UK


Please tell us a bit about your UAV interest

I am looking to undertake aerial photo work for DEM reconstruction


Hometown:

Newcastle


Activity Feed

Darrel Maddy commented on Jerry Wangbichler's blog post Building quick-deploy GPS boxes for GCPs
"Sorry Jerry I did not mean to sound flippant. I guess I would still recommend going for 3 reaches though. 
I note the accuracy you require is not high so L1 would probably be sufficient. Just be aware that getting the logging to work consistently on…"
Mar 11
Darrel Maddy commented on Jerry Wangbichler's blog post Building quick-deploy GPS boxes for GCPs
"I have experimented with the ardusimple boards for L1+L2 processing. Problem is they do not have on-board storage and setting up the pi (in my case pi zero) has just added to the things that can (and do) go wrong. Given your budget I would just get…"
Mar 10
Darrel Maddy commented on Mateusz Sadowski's blog post Livox Mid-40 LiDAR short review
"Thanks for sharing this. Mine arrived yesterday and I will be trying out a similar static test over the weekend. I will be testing this as a small area mapping platform attached to my DJI S900 frame (emlid edge controller). My plan is to use an…"
Feb 19, 2019
Darrel Maddy replied to Darrel Maddy's discussion How to slow a flying wing
"Thanks Darrell,
I was basing my concern on recommendations not on actual experience!  I have been trying to use a DrotagX for geotagging and it recommends a minimum of 3s between shots (this could not be achieved at the ground speeds measured). I…"
Jun 26, 2018
Darrel Maddy replied to Darrel Maddy's discussion How to slow a flying wing
"OK maybe I am being too pessimistic about the camera. I must confess that I have not used the A6000 before. When using the A5100 we tried to set a max of 3s between shots - this is not the exposure time but the time between shots. If it can shoot…"
Jun 24, 2018
Darrel Maddy replied to Darrel Maddy's discussion How to slow a flying wing
"Thanks Antonie for sharing your setup. We have flown Skywalker 1900 for the past four years with some success but we have moved to the flying wing to get the camera front first. We fly missions of ~45 minutes on average and with our overlap and…"
Jun 24, 2018
Darrel Maddy posted a discussion
We are trying to tune a flyingwings Falcon 5 mapper pro flying wing. This may be a very silly question but is there an obvious way to slow down ground speed in auto?We have trim_throttle set at 30 and min set to 12m/s and max to 18m/s. Into wind we…
Jun 23, 2018
Darrel Maddy replied to Paul Manley's discussion Can a pixhawk work only as a camera trigger and not control flight plan?
"Thanks Paul that is encouraging. 
I will stick with the pixhawk rather than defer to the A3 as the intention is get dgps precision for camera positioning (without paying the ridiculous DJI prices). I am also looking at using a DrotagX as I am told…"
Mar 9, 2017
Darrel Maddy replied to Paul Manley's discussion Can a pixhawk work only as a camera trigger and not control flight plan?
"I would like to know the answer to this also. I am forced in to buying a M600 but I will not pay DJI prices for L1 dgps.!  I would like to mount a pixhawk with emlid reach and then trigger a camera from the pixhawk (with hotshoe shutter timing). I…"
Mar 9, 2017
Darrel Maddy replied to Samson's discussion Is it possible for me to build a DIY mapping fixed wing drone?
"That build is almost identical to mine!  Have you flown it yet? Weather has been crap here so no chance for me yet,
Have you added any additional strengthening beneath the camera?  I am probably going to use a servo gimbal (2-axis) but need to…"
Feb 13, 2017
Darrel Maddy replied to Samson's discussion Is it possible for me to build a DIY mapping fixed wing drone?
"Samson,

I started building fixed-wing drones for AP a couple of years back. The building is an easy process (you will get really good at this as crashing is part of the learning process).  If you have never flown an RC plane however I would not…"
Feb 11, 2017
Darrel Maddy replied to Charles Kim's discussion CAM Msgs and Files discrepancy, Check it! Aborting... error (Geo Tagging)
"Charles,
I have not used Pix4D Mapper as I have access to Photoscan Pro for SfM (point cloud reconstruction). I do not routinely use Geosetter although some think that is good practise. I tend to use it only if MP fails. The issue of accurate…"
Jan 20, 2017
Darrel Maddy replied to Charles Kim's discussion CAM Msgs and Files discrepancy, Check it! Aborting... error (Geo Tagging)
"Charles,
I have also had this problem a number of times and not yet resolved a solution. I turn to geosetter ( http://www.geosetter.de/en/download/ ) when I get this. It also has problems but sometimes I get a satisfactory solution, There is a nice…"
Jan 19, 2017
Darrel Maddy replied to Tom's discussion Skywalker X5 X6 or Finwing Penguin for Mapping
"Started to reply and then noticed how old this thread is :) 

 "
Dec 2, 2016
Darrel Maddy replied to Darrel Maddy's discussion Help with 3DR radios in MP
"Hi Chris

The radios are fine on the SiK tab - they connect and both sets of radio parameters show up correctly. When I then try to hit connect in MP (to download parameters etc)  it just times out. 
It seems like a software issue to me but I cannot…"
Aug 19, 2016
Darrel Maddy replied to Darrel Maddy's discussion Help with 3DR radios in MP
"Yes I did wonder about the sequence of power-up but I have now tried this on two airframes (a hex with the dropix and a fixed wing with a 3dr pixhawk), the hex has only a drotek SMARNAV RTK system and the fixed wing an emlid REACH RTK system.…"
Aug 14, 2016
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