Jolyon Saunders
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  • Sydney
  • Australia
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Jolyon Saunders's Groups

Jolyon Saunders's Discussions

Freaky Phase angle on 450

Started this discussion. Last reply by Jolyon Saunders May 7, 2013. 17 Replies

My 450 has a wobble on the pitch axis, unless 42 degrees of H_PHANG is added. It appears as a rapid clockwise toiletbowl effect, which subsides as H_PHANG approaches 42 degrees. If H_PHANG exceeds 42…Continue

Arducopter - Trad Heli development

Started this discussion. Last reply by Rob_Lefebvre May 14, 2013. 53 Replies

 This is a place for discussion, information, questions and answers related to the development of Arducopter for Trad Heli.Continue

Trad Heli FPV discussion

Started this discussion. Last reply by Rob_Lefebvre May 1, 2013. 47 Replies

Hey all, here is a place to post details and info of your FPV setups, questions, vids etc.My setup is as follows:Trex 450 PRO frame stretched to 480APM2.5 with UBLOX GPS and power moduleTarot DFC…Continue

Tags: arducopter, heli, helicopter, FPV

Fixing the gap with the APM 2.5+ side entry case

Started this discussion. Last reply by Eric S. Jul 12, 2013. 1 Reply

I got my APM last night, and I'm very impressed with this hardware as a whole. I did notice that there was a problem with the way the case looked. The case came cracked and the gap around the side of…Continue

Tags: side entry, apm, fix, gap, case

 

Jolyon Saunders's Page

Latest Activity

Jolyon Saunders left a comment for Rowan Watkins
"Correction to my last, to my best knowlege spline is supported on older boards, sorry for wrong info."
Jan 18
Jolyon Saunders left a comment for Rowan Watkins
"I accidentally posted my reply on my profile instead of yours so I'll repost it here. Hi Rowan, What a fantastic project! Looks like an original idea, and it will be awesome to see it in the air!! The GPS is best placed put away from the…"
Jan 17
Jolyon Saunders left a comment for Jolyon Saunders
"Hi Rowan, What a fantastic project! Looks like an original idea, and it will be awesome to see it in the air!! The GPS is best placed put away from the mast because the metal in the rotor will block satellites. Also, if your mag is built into the…"
Jan 17
Rowan Watkins left a comment for Jolyon Saunders
"Thanks Joly, understood, good points. The DDVP TR will be going in the next incarnation of our unique StopRotor UAV, see http://www.stoprotor.com.au/ This concept has been in development for a number of years and we are currently testing a 2…"
Jan 12
Jolyon Saunders left a comment for Rowan Watkins
"Some things worth considering: 1. Ensure the tail motor is governed otherwise tail performance becomes very unpredictable 2. Use as light a motor as you can safely get away with. Unlike the main motor, it doesn't pay to use an overpowered tail…"
Jan 11
Rowan Watkins left a comment for Jolyon Saunders
"Thanks Joly, I am working on a project using a Trex700E. I have it flying with a PixHawk and it has the conventional shaft drive tail. I note that both you and Rob have had success with DDVP TR on a range of helicopters and I'm keen to convert…"
Jan 11
Jolyon Saunders left a comment for Rowan Watkins
"Hi Rowan, I'm from Sydney also. I'm away for work for the next few months but I'm happy to discuss DDVP with you"
Jan 10
Jolyon Saunders commented on ComQuestVentures's blog post Vertex VTOL Hybrid UAV: New Video and Full Specs Released
"This is a very interesting project. VTOLs are a challenging balancing act, so congrats on getting some competitive performance. Can't wait to see more info and videos"
Jan 4
Jolyon Saunders commented on Quadzimodo's blog post Drones to provide bird's eye view of Sydney NYE fireworks
"** by very long range I mean about 300m+, in the dark. Technically not long range. They were also at an alt higher than the harbour bridge, but not extremely high as I could see the lights from their drones using binos."
Dec 31, 2014
Jolyon Saunders commented on Quadzimodo's blog post Drones to provide bird's eye view of Sydney NYE fireworks
"I saw these guys out on their barge at 2100-2145 on the 30th Dec. They must have been doing a trail run. They had two drones. They were flying at very long range and high altitude, definitely not within LOS so they must have had special approval for…"
Dec 31, 2014
Jolyon Saunders commented on Joshua's blog post A reminder to double and triple check your products (exploded ESCs)
"Unless your ESC supports "active freewheeling", throttle inputs of less than 80% will cause increased heat build up in your ESC. This is common knowledge for RC helicopter users. It it not recommended to have low throttle inputs to your…"
Nov 2, 2014
Jolyon Saunders replied to Kristian's discussion Almost got killed in the office today. Log file attached..
"It might not always seem practical to remove props, but at least disconnect one (best to do two) of the 3-phase wires on each motor. Then the motor just stutters instead of going into flying death mower mode. Another option would be to make a…"
Oct 29, 2014
Jolyon Saunders commented on Jolyon Saunders's blog post 3D printer + TradHeli + PX4
"^^ +1. Of the 3 clones I have owed, all of them failed prematurely. Of the two genuine boards I have, one is 100% fine, the other was destroyed in a major crash (human error) but was extremely reliable, literally had hundreds of flights on…"
Oct 27, 2014

3D Robotics
Craig Elder commented on Jolyon Saunders's blog post 3D printer + TradHeli + PX4
Oct 27, 2014
Jolyon Saunders commented on Jolyon Saunders's blog post 3D printer + TradHeli + PX4
"I never got a chance to test it properly, but I have always mounted my autopilots underneath between the skids. My helis have always performed extremely well in alt hold, so the baro performance seems OK. I think the new position in the above…"
Oct 27, 2014
Xin H commented on Jolyon Saunders's blog post 3D printer + TradHeli + PX4
"Nice place to mount a PX4 indeed! I'm a bit curious about the barometer, does it work well and not affected by the airflow?"
Oct 27, 2014

Profile Information

About Me:
I'm an **aspiring** member of the Arducopter dev team. I am currently yet to make my first contribution to the project, but have a number of prospective contributions in the pipeline.
Please tell us a bit about your UAV interest
Traditional helicopter development
Hometown:
Sydney

Jolyon Saunders's Blog

3D printer + TradHeli + PX4

Posted on October 26, 2014 at 3:05am 8 Comments

At last, I have something to share with you all. Some details as to how I mount my autopilot boards to my helis. Mounting these boards on helis has been a touchy subject, but so far I have had pretty decent luck. I am yet to experience 'the leans' with this method - the unpredictable variation of AHRS estimate caused by vibration. This also gives me a chance to show off my hand modeling skills ;)…

Continue

Comment Wall (3 comments)

At 10:01pm on January 11, 2015, Rowan Watkins said…

Thanks Joly,

I am working on a project using a Trex700E. I have it flying with a PixHawk and it has the conventional shaft drive tail. I note that both you and Rob have had success with DDVP TR on a range of helicopters and I'm keen to convert my 700 to this configuration.

Do you have any advice for this type of set up? Rowan

At 4:06am on January 12, 2015, Rowan Watkins said…

Thanks Joly, understood, good points.

The DDVP TR will be going in the next incarnation of our unique StopRotor UAV, see http://www.stoprotor.com.au/

This concept has been in development for a number of years and we are currently testing a 2 meter long fiberglass version with a 600 size rotor, 700 engine and 800 tail boom.

This aircraft is designed to operate as either a fixed wing or rotary wing and convert in-flight between modes using a Patent Pending method.

We will be using the DDVP TR to enhance control during this transition phase and provide normal Anti-Torque in helicopter mode. During fixed wing flight, the tail rotor will be stopped and the main rotor is locked to operate as fixed wings.

Over the last few years we have proven the various elements of this aircraft using a number of radio controlled models, including an in-flight start from fixed to rotary wing operations.

We have flown numerous rotary wing flights and are slowly pushing out the flight envelope which is a challenging process as it involves learning about the machine and just as importantly, how the PixHawk and ArduCopter software affect the handling.

In conjunction with the real world models, we have done extensive testing in X-Plane and achieved significant correlation between the virtual and real world models. X-Plane has also proven to be a great tool for training prior to any real world tests.

As these models take a long time to build, I have also been testing ArduCopter on a Trex500 and have a few questions about it.

I currently have the GPS pedestal mounted on the Trex body, close to the rotor mast, but have recently been having issues with the GPS signal. Do you have any recommendations about GPS placement?

Also, I can't get Spline Nav to work on the 500.

The 500 is running a Hobby King HKPilot Mega 2.7 with ArduCopter 3.2. I know the APM 2.7 is not the same as the PixHawk, is this a possible reason why spline won't engage?

Again, thanks for you time and input.

Regards

Rowan

At 11:06pm on January 17, 2015, Jolyon Saunders said…
Hi Rowan,

What a fantastic project! Looks like an original idea, and it will be awesome to see it in the air!!

The GPS is best placed put away from the mast because the metal in the rotor will block satellites. Also, if your mag is built into the GPS then it's beat to keep it away from all metallic objects and all cables. I mount mine on a 3D printed bracket which is cable tied to the tail boom.

I'm pretty sure spline isn't compatible with older boards like APM. Pixhawk has a much more powerful processor which supports many more firmware features that are always turned off on APM boards. It isn't possible to run the newer features without a more powerful board.

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