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John Arne Birkeland
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  • Norway
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John Arne Birkeland's Groups

John Arne Birkeland's Discussions

Problem maintaining pitch when accelerating / decelerating.

Started this discussion. Last reply by Michael Zaffuto Jul 2, 2010. 29 Replies

Servo problem with the new red (328) cards?

Started this discussion. Last reply by Chris Anderson May 3, 2009. 22 Replies

 

John Arne Birkeland's Page

Latest Activity


Developer
John Arne Birkeland commented on Thomas J Coyle III's blog post Secret Service: Drone that crashed on White House grounds was being used recreationally
"Stupid is as stupid does.."
Tuesday

Developer
John Arne Birkeland replied to Anna Tian's discussion Best open source autopilots v.s. commercial autopilots for conventional fixed wing unmanned aircraft usage
"I totally agree with you Gustav if you only look at the technical aspect and cost of hardware. But when it comes to military applications, then cost of actual hardware is a very small part of the total cost. The big ones are certifications,…"
Sunday

Developer
John Arne Birkeland commented on Greg Dronsky's blog post DJI confirmed an issue with the Inspire's firmware...
"I read about this on RCGroups, and the bug is a lean (bad IMU offset) at takeoff. And as told by another person who experienced the same bug, it just required a little opposite stick to prevent it from flying away. But I guess that is to much to ask…"
Friday

Developer
John Arne Birkeland commented on Swift's blog post ... a Blog just for fun... I like these guys!
"You will never have more fun flying RC, then when you horse around flying a wrecked plane/copter in friendly company."
Jan 15

Developer
John Arne Birkeland commented on Chris Anderson's blog post FAA study finds trained pilots *worse* at operating drones
"It's not about safety in the traditional sense I think. But instead politics where the goal is to raise the threshold for commercial operation to such a level, that only large corporations have the resources needed."
Jan 15

Developer
John Arne Birkeland commented on Daniel Nugent's blog post Precision Land ArduCopter Demo
"Optical flow used for motion detection usually have very sensitive low resolution sensors with high frame rates. At normal video rates (30fps), high speed movements may cover a lot of pixels and introduce motion blur. And searching movement over…"
Jan 10

Developer
John Arne Birkeland commented on Lachy Goshi's blog post Council Investigating using Drones for Shark Patrol on Australia's famous Bondi Beach
"I know we are supposed to use drones for everything now, but to look for sharks at a beach would it not be more practical to use tethered balloons? Or even better a nice pan-tilt camera with nice zoom optics on a pole to get the height advantage…"
Jan 8

Developer
John Arne Birkeland commented on Rob_Lefebvre's blog post Oh Look. Yet another quadcopter goes over $1M on Kickstarter.
"Even if we assume it all works as advertised feature wise, at that size and weight it will be impractical to use outside. Any wind at all and you can proudly join the "fly-away" club."
Jan 7

Developer
John Arne Birkeland commented on Stuart Brookes's blog post Just seen this on the local news (ITV Meridian South (UK))
"Listening to the recording this was clearly not the first request then had made for him to stop flying. The rest is dead simple. If the police tells you to do something you do it, no matter if your think it is right or wrong. And then if need be…"
Dec 31

Developer
John Arne Birkeland commented on Matt Droter's blog post Drone flyover lands Montreal man $1,000 fine
"Rob, you can hope they will be so swamped with SFOC applications that they suddenly start to see the need for a simplified process. That's exactly what happened in my country. Previously you had to apply using the same process as an commercial…"
Dec 29, 2014

Developer
John Arne Birkeland commented on Chris Anderson's blog post AVC 2105 announced
"I guess someone at spark had a chance to think about liability and some of the near misses last year and how easily that could have turned for the worse. It's a great event, and I love the free spirit of it. But sadly, flying high velocity…"
Dec 23, 2014

Developer
John Arne Birkeland commented on Mark Harrison's blog post Latest report on FAA causes extended eye-rolling in drone community
"Someone needs to tell FAA that 'drones' are unmanned crafts. And mostly small lightweight ones at that."
Dec 22, 2014

Developer
John Arne Birkeland commented on Rob Dunbar's blog post 1st Drone in Nevada Test Program Crashes in Demo
"If you can't hand launch without a running start, it is either overweight or to big to be hand launched in the first place. The running full speed throwing like crazy launches are a steady source of entertainment (i.e. carnage) at local RC…"
Dec 21, 2014

Developer
John Arne Birkeland commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"Relax. Crashing is the one thing I can absolutely guarantee everybody will do in this hobby. In fact it's just part of the fun. https://www.youtube.com/watch?v=cZlTlDdZfbg&list=UUyw0zM6J3fae6g5GtJU0giw"
Dec 8, 2014

Developer
John Arne Birkeland commented on Eric Compas's blog post APM response to catastrophic air frame/wing failure?
"With the exception of full throttle, APM already did the correct thing for such a failure. Meaning it never gave up and tried to fly the plane all the way down to the ground to try and minimize damages. That is pretty much all you can do with a…"
Dec 6, 2014

Developer
John Arne Birkeland commented on Kirill Mityugin's blog post Skua arrived
"A 2820 motor is much to small for this bird. Especially one fully loaded with a large battery and FPV equipment. It would probably fly, but you would be pushing the motor so much that any gain from reduced weight would be lost to heat. For long…"
Dec 6, 2014

John Arne Birkeland's Blog

Another multicopter crash into a crowd..

Posted on September 17, 2013 at 3:45pm 41 Comments

So it happened again, and it will continue to happen until people realize this technology is far from mature enough to be used for such tasks.

Aside from endangering peoples lives, the public opinion created from such incidents will be very damaging and contribute to overly restrictive UAV laws in…

Continue

Two-Stage Copter

Posted on December 28, 2012 at 7:00pm 10 Comments

This video was just posted by EndOfDays, a well known figure in the photo/video multicopter scene.

And for the record, let me just say that some people have WAY to much free time. :)

ZeroUAV YS-X4 teardown

Posted on December 25, 2012 at 4:30pm 9 Comments

So no completely trusting that Santa had gotten the message, I made sure that there at least was one present under the tree that I would like.

The YS-X4 is the latest multi-rotor autopilot from ZeroUAV, and their entry into the…

Continue

Teensy 3.0

Posted on October 11, 2012 at 2:17am 15 Comments

Just a heads-up that Teensy my favorite small form factor Arduino compatible board, just got a solid upgrade with the…

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Parallella: A Supercomputer For Everyone (Kickstarter)

Posted on September 29, 2012 at 10:50am 11 Comments

I just want to give a shout about a Kickstarter project that I think deserve some…

Continue

Comment Wall (7 comments)

At 3:30am on April 17, 2011, thomas marschall said…
Hei

Fant deg her på diydrones og tipper du har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.

Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--

Vennlig hilsen / with regards

Thomas Bjørn Marschall

At 3:31am on April 17, 2011, thomas marschall said…
Hei

Fant deg her på diydrones og ser du kanskje har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.

Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--

Vennlig hilsen / with regards

Thomas Bjørn Marschall
At 6:31pm on April 17, 2011,
Developer
John Arne Birkeland
said…
Heisann. Har vel strengt tatt ikke et arducopter da jeg liker å bygge mest mulig selv, men flyr quad mm. ja. :) Noe samling høres moro ut.
At 9:30pm on September 1, 2011, Ravi said…

Hi john, i am able to get PPM output from a PIN of Thomas Scherrer 12 channel receiver. is the PPM sum signal compatible with the ATmega2560 PPM decoder or i have to decode it through a interface. actually i am more of an aircraft engineer and less of a electronic engineer. the signal is coming from a Futaba 7C Tx onto a 12 channel thomas Sherrer Rx on 12 channel pin. can i give it directly to PIN 1 of APM after shortening PIN 2 &3 or i have to use an interface using PPMencoder. please help. i am currently using APM2.23. thanx, ravi

At 3:43am on September 2, 2011, Ravi said…

Hi john, i tried giving PPM to channel 1 PIN of APM and shortend PIN 2 & 3. did not work. I am not getting PWM out to servoes. Thomas Scherrer Rx takes PPM pulse from Futaba 7C Radio. It has a UHF RF Module which has been connected to the PPM out of Futaba 7C, this drives a 12 channel Rx also designed by Thomas Scharrer. I think the PPM pulse form futaba 7C should pass on as it is to the Thomas Scharre Rx which has a PIN for direct PPM out? what should i do next.

At 7:33am on August 18, 2012, Adam Scriven said…

Hey John!

Do you have any updates on Crawler1? What do you think of the Redcat Rockslide 1/8th? How does it hold up to your use/abuse? One of the things about the RS is that the only place making after-market parts for it seems to be RedCat itself, not many 3rd party manufacturers. Has that been a problem?

Thanks for any updates you can provide! ;)

At 8:33am on April 15, 2013, baufay patrick said…

Mister.
I seek information for zero ys-x4 wiffi
you to be able to help me if me question poses has you
I thank you for answer
I am of Belgium
patrick.baufay@skynet.be

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