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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 replied to fabio alberto figueroa benitez's discussion construction of a drone
"Start simple. Make something basic that works, and then build on it. To many projects never get anywhere because they try to include everything from the beginning. Also don't fall in the NIH (Not Invented Here) trap. Highly experienced people…"
22 hours ago

Developer
John Arne Birkeland commented on Joe Renteria's blog post "Wing Board" using Pixhawk and GCS...
"I would look into adding some dihedral to the wings."
Sunday

Developer
John Arne Birkeland commented on Rob_Lefebvre's blog post Procyon 800E Phase 2 Beta Testing Begins
"Rob, during auto rotation there is hardly any energy in the blades, so a tip over won't necessarily 'disassemble' the helicopter. I think performing the auto-auto part will be the most tricky, since it will require a different…"
Sunday

Developer
John Arne Birkeland commented on Rob_Lefebvre's blog post Procyon 800E Phase 2 Beta Testing Begins
"Rob. Depending on the plastic type if you dip the 3d parts in acetone for a couple of minutes, you get a smooth surface just like injection molded plastic."
Friday

Developer
John Arne Birkeland commented on Rob_Lefebvre's blog post Procyon 800E Phase 2 Beta Testing Begins
"Impressive Rob. Very impressive. @LFLoTiTo, if you are worried about transporting batteries on airplanes, you should try bringing a can of fuel.. :)"
Friday

Developer
John Arne Birkeland commented on Greg's blog post Have Multi Rotors Killed the Helicopter?
"@Gary Experienced R/C helicopter pilots will often throttle cut and auto rotate the last meter or so as a part of normal landings, to remove excess energy before touch-down."
Thursday

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"This is my final take on all this. Most importantly the rules of the competition pretty much dictated the design result for a functional solution. Just look at Hellcat's entry. He is a professional and did the actual math, and ended up with a…"
Thursday

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"@Chris, respectfully no documentation is not going to fix the structural wing problem, impossible placement with regard to cg and under dimensioned VTOL motors and propellers for the weight class etc."
Jul 18

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"Sure when in need of complexity, add trust vectoring. :) And if we are going to nitpick, there is no need for the ruder when you already have a v-tail (provided it has control surfaces). "
Jul 18

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"If you look at the entry page for the winner, there are no elevator control surfaces. Sure, it is just a matter of adding them to the sitting v-tail in the drawing, but it illustrates how far from working solutions these entries are. "
Jul 18

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"You don't really have to look very close to see that they aren't functional models, only concepts. The winning entry for example, doesn't come with any elevators.. And to preempt the obvious rebuttal. Using the quad part for elevation…"
Jul 17

Developer
John Arne Birkeland commented on Greg's blog post Have Multi Rotors Killed the Helicopter?
"Multi-copters are cheap and easy to make, making them perfect for consumer markets. But they have severe practical limitations when put to commercial usage. But for some reason, they trigger the imagination and has become a media darling. So…"
Jul 16

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"From what I can gather, most of the contestants are industrial design types doing this 'on the side'. The entries are just rough 3d renders of ideas, not real working solutions with countless hours of functional engineering, prototype…"
Jul 16

Developer
John Arne Birkeland commented on Chris Anderson's blog post Winners of Airbus cargo drone competition announced
"Sure they look great, but it's still just a fixed wing with a fat belly for storage and a quad stuck on for show. The rules of this competition pretty much excluded any kind of innovation. The wings on the winner sure is eye candy, but how do…"
Jul 16

Developer
John Arne Birkeland replied to Chris's discussion Why aren't there more single rotor drones out there?
"Seems we are back to one of my pet peeves. The 'old-school' R/C pilots vs new generation of 'I just want to press a button and take pictures' users. I am solidly in the pilot camp. The 'press a button' user scenario is…"
Jul 11

Developer
John Arne Birkeland replied to Chris's discussion Why aren't there more single rotor drones out there?
"Chris Olsen: I totally understand your point about RMAX not being practical for large areas. My point was about safety. It does not matter if a RMAX falls down, unless by some freak chance there is a person just at the spot where it goes down.…"
Jul 10

John Arne Birkeland's Blog

Fast accurate LIDAR

Posted on June 2, 2016 at 2:06am 5 Comments

Interesting article in EE Timers Europe. http://www.electronics-eetimes.com/news/light-centimetre-level-slam-drones/

Working deeply with CERN (European Centre for Nuclear Research)…

Continue

GoPro announces third-party developer program

Posted on April 15, 2016 at 1:23am 1 Comment

Article from ZDNet.

GoPro quietly announced its Developer Program on Tuesday, as it looks to incorporate…

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DJI, Parrot, GoPro and 3DR leave Small UAV Coaliton

Posted on April 3, 2016 at 6:30am 7 Comments

From USA Today article Drone coalition splits as DJI, GoPro faction quits.

SAN FRANCISCO — The national group that represents companies that make and sell drones has split, with those focused on consumers…

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Just a normal day in the park

Posted on September 4, 2015 at 1:00pm 25 Comments

https://www.youtube.com/watch?v=t5JgnMJzCtQ

I just came across this one.

Disregarding all the usual concerns involved with manned flights of this type etc. I like the technical solution of using many self contained units, each with it's own battery, ESC, motor and propeller. Keeps it…

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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