John Cousins
  • Male
  • Perth, Western Australia
  • Australia
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John Cousins's Discussions

Mugin UAV 3m

Started this discussion. Last reply by Joshua 15 hours ago. 23 Replies

              I have decided it's time to move up to a large UAV airframe.I still have the giant payload master in the build, but it is taking forever as if i'm not working offshore, i'm busy test…Continue

Current Australian UAV regulations.

Started this discussion. Last reply by John Cousins May 13, 2012. 2 Replies

Hey there all. I've been busying myself with test flying foamies and getting all my Ardubugs ironed out.I haven't checked in on the CASA regulations for ages...Finally I feel i'm ready to step up to…Continue

Telemetry Port

Started this discussion. Last reply by Søren Kuula Aug 31, 2013. 8 Replies

Hi all!This isn't a discussion about wireless telemetry but more to do with the telemetry port itself.Could somewone tell me what the signal voltage levels are on the tlemetry port on the Ardupilot…Continue

Telemetry port (Port3) ?

Started this discussion. Last reply by John Cousins Mar 23, 2011. 4 Replies

Hi there all. First of all, to give you a little run-down on my situation... I work on an oil rig and I have been playing around building and testing my APMega after hours. I haven't been able to…Continue


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Latest Activity

Joshua replied to John Cousins's discussion Mugin UAV 3m
"Unfortunately I don't have the configuration file available to me for the next few days (Easter long weekend), but afterwards I should be able to retrieve it. As for the internal mounting, here are some (sorry for the poor angles though)…"
15 hours ago
Waqas Tariq replied to John Cousins's discussion Mugin UAV 3m
"Hi Joshua, Thanks for the reply and information. It looks pretty interesting. I am planning for a pixhawk in the system. Do you have a configuration file for the APM. I really would like to know the autopilot tuning PID's which is the most…"
17 hours ago
Joshua replied to John Cousins's discussion Mugin UAV 3m
"Hi Waqas,Obviously I'm not John, but my team has been utilising the Mugin 3m v3 with the APM 2.6. To mount the APM we created an avionics board (made of balsa wood and depron foam) that sits inside the fuselage and is mounted on top of…"
17 hours ago
Waqas Tariq replied to John Cousins's discussion Mugin UAV 3m
"Hi John, This is a great UAV platform. I am using this here in Nigeria. We have about 5 kits and have over 5000 hours day and night flying. We are using these as our RC UAV trainers. I am planning to install one of the Mugin with the Ardupilot. I…"
Ben replied to John Cousins's discussion Introductions. Drop in and say hello! in the group Western Australia
"Hi everyone, I've recently got back into this after a bit of experimentation a few years ago. As a project back then, I wrote FBW style code on a PICAXE (8 bit chip) and had that flying in an easy star. Work got in the way but now I am finally…"
Apr 8
FPVMODEL replied to John Cousins's discussion Mugin UAV 3m
"This is the latest version. It has had the landing gear for the nose reinforced and the elevator has been split to use two servos and not one. There has been some discussion on what motor is the best. Many people seem to prefer DLE-60 engine. "
Jan 8
Søren Kuula replied to John Cousins's discussion Mugin UAV 3m
"Hi John, what sort of 3G telemetry system is that? Regards, Soren"
Nov 13, 2013
Joshua replied to John Cousins's discussion Mugin UAV 3m
"Hi Paulino; my team has recently acquired a Mugin v3; the engine included is the GF55ii twin-cylinder. We have not yet installed the engine or tested it, but you can see reviews of the engine online. This page has a fair bit of discussion on…"
Nov 6, 2013
Søren Kuula replied to John Cousins's discussion Telemetry Port
"Hi, APM uses 5V TTL logic. Logic 0 and logic 1 are the same as RS232 however the voltages are the other way round. +12V<-->0V and -12V<-->5V. Hardly anyone uses the 12V signals (although these are the real RS232 ones) for small short…"
Aug 31, 2013
Søren Kuula replied to John Cousins's discussion Telemetry Port
"Hi, really not? There are overvoltage protection diodes in the IO ports of all those chips. If you pump 5V into an input of something running at 3.3V, the diode from the input to +3.3V will draw current. Quite a lot of current actually. So much…"
Aug 31, 2013
Tommy Larsen replied to John Cousins's discussion Telemetry Port
"I have been connecting my APM2.5 directly to the Rpi with no issues. 5 <> 3.3 volt is no problem :)"
Aug 31, 2013
Phil P replied to John Cousins's discussion Telemetry Port
"I can answer question 1. The signal from the APM should be inverted before going to a standard rs232 port. Use a MAX232 chip though I can't confirm if it is 3.3v logic."
Aug 31, 2013
Justin replied to John Cousins's discussion Telemetry Port
"I have used APM 2 with the second gen Raspberry with no power issues tested for over 24 hours with no problems (not flying ground test).This was directly connected to telem on APM and GPIO to Raspberry how ever I  was using the Raspberry to…"
Aug 31, 2013
Artem replied to John Cousins's discussion Telemetry Port
"I am a no expert in apm, but..... usual FTDI cables which supply 5v and 3.3v logic are very tolerant to 5v logic circuits.... so, I am pretty sure it is just this ftdi tolerance that makes communication with apm at 3.3v possible, however raspi tx/rx…"
Aug 8, 2013
James Small replied to John Cousins's discussion Telemetry Port
"I am also trying to find out the TTL level of the APM telemetry port. For those who would say "it's 5 volts", then why is it suggested to buy a 3.3 volt USB TTL to program the 'APM-telmetry radio'? For those who would say…"
Jul 19, 2013
nick reeves replied to John Cousins's discussion Mugin UAV 3m
"john, did the mugin ever fly? i am still very interested to hear of your experiences with it   cheers   nick"
Jul 1, 2013

Profile Information

About Me:
Currently an ROV Pilot / Submersible engineer, previously an Aircraft Maintenance Engineer (Pilatus PC-9)
Interests are UAVs(of course), telemetry, High performance automotive technology, turbo and super-charging. Engine Management Sytems.
Please tell us a bit about your UAV interest
I get paid to fly ROVs.... so why not fly UAVs s well?
Perth, Western Australia

Comment Wall (1 comment)

At 6:13pm on July 12, 2012, Wanabigaplane said…

Hi John,

I see you are into flying a Mugin.

I am in a group preparing for the Outback Challenge. See  We were donated a Mugin by Cyber Technology in Perth. I think they obtained the plane before it was marketed as it is now, because they put a single cylinder DA50 on it.

It is a great aircraft for this purpose. It goes like the clappers and handles the weather really well.

The engine was purchased by Cyber Technology with the timing altered so that it runs in reverse. This means the full range of commercially available propellers can be used.

Vibration is a problem. A main wheel fell of on the first flight. The ailerons and elevons are held on by a 3mm aluminium shaft through a groove in the balsa of the flying surfaces, and either the hard balsa ribs or fibreglass sheet projections from the wing. With the vibration, after 4 a few hours airtime, the holes have doubled in size and the fibrglass has worn through. We are grounded at the moment while I do alot of surgery in order to rebuild the bearings and install brass sleeving on the shaft at every joint.

To balance the aircraft we had to put 4Kg of lead acid battery in the nose. This makes the aircraft heavy, so it flies fast and lands fast. Our nosewheel arrangement is just not up to it. After rebuilding the forward bulkhead we now attach the nosewheel shaft with nylon bolts.With the long nosewheel leg we break the bolts just about everytime it overruns the runway into the grass. Many of the aluminium parts on the nosewheel have been rebuilt at some stage.

We have just recently ordered through the supplier a number of replacement parts, especially the aluminium wingspar and booms because the material is, not to our knowledge, commercially available in Australia.

I'd love to hear how you get on.


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