Andrew Rabbitt
  • Male
  • Melbourne, Victoria
  • Australia
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Andrew Rabbitt's Groups

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Andrew Rabbitt's Discussions

Logging airspeed on 2.74 onwards...?

Started this discussion. Last reply by Andrew Rabbitt Feb 6, 2014. 2 Replies

Does anyone know which parameter group I can find airspeed to log (passively). I have looked in CTUN and NTUN but neither appear to have this listed. Any hints and tips here...?

APM in a 250

Started this discussion. Last reply by Rob_Lefebvre Jan 20, 2014. 8 Replies

The crazy man in me is trying to stuff an APM into a cheapie HK250GT as a method to waste an inordinate amount of time. (and likely also money) It is a great lesson in weight reduction and…Continue

Arduino/Ardupilot IDE "hangs" whilst attempting to complie

Started this discussion. Last reply by Andrew Rabbitt Aug 9, 2013. 1 Reply

I'm trying to compile a (very) subtly modified version of Arduplane 2.74b using the IDE downloaded from the Arduplane website (1.0.3) but it hangs when I try to compile.  Actually, it doesn't hang…Continue

Mapping servo neutral and end points...?

Started this discussion. Last reply by Andrew Rabbitt Aug 28, 2013. 5 Replies

Does anyone know any way of mapping the servo mid and end points that APM uses?I have modified elevons on my Skyfun which, unfortunately, have a limited down travel.  If the elevon servo forces it…Continue

 

Andrew Rabbitt's Page

Latest Activity

Jared Reabow commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"can you imagine flying an x8 past  them no flight controller hehe"
Wednesday
Stephen Gloor commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"You might need two and use the speed difference between them to estimate it.  Mind you I could just take the Penquin out this week and move the battery back a bit and see how it goes.  I also have a wing that is eventually getting an APM…"
Tuesday
Andrew Rabbitt commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"I think if you have an accurate airspeed signal you should be able to infer angle of attack from that and the acceleration vector"
Tuesday
Stephen Gloor commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"And if this is the same Steve Morris then he at least has done a fair bit since https://www.youtube.com/user/smorrismlbco http://mlbuav.com/"
Tuesday
Stephen Gloor commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"Yep - they had an angle of attack sensor as well as this would be pretty critical.  An accelerometer or magnetometer can only give you a pitch angle not one referenced to the on-coming airstream."
Tuesday
Andrew Rabbitt commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"It would be fun to explore this Stephen, but I think there are two issues that might arise.  Firstly the extra servo work might cost you flight time in mAh rather than L/D and secondly, (I think) you'd need a pretty reliable airspeed…"
Tuesday
Stephen Gloor commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"Makes you wonder how unstable our UAVs could be and still fly.  Relaxed stability gives more efficient flight sometimes and a greater maneuver envelope potentially. I have a couple of times been guilty of launching a plane in stabilise or FBWA…"
Tuesday
Andrew Rabbitt commented on Chris Anderson's blog post New drone magazine from Discover
"A magazine?  How very '90s! :)"
Tuesday
Eli Cohen commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"Literally just read a paper from Ilan Kroo the other day (tailless aircraft paper). Fantastic resource for people working on flying wings."
Monday
Gary McCray commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"Hmm! APM mark .0001 Alpha Great video"
Monday
Daniel Nugent commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"I love it! Great video."
Monday
Cliff Dearden commented on Andrew Rabbitt's blog post Digital flight control research from the '80s
"Beautiful !!..... I wonder what those guys are doing now?"
Monday
Andrew Rabbitt posted a blog post

Digital flight control research from the '80s

I tripped over this on my suggested links and thought it might be of interest to the DIYD crowd.  Fascinating to see an original Macintosh being used as a ground station!See More
Monday
Andrew Rabbitt commented on Bertrand Duchiron's blog post Lynxmotion Quadrino Flight Controller (ex Flyingeinstein)
"I dunno Rob, but I seem to be collecting a few different styles in my desk drawer.  Looks like I need to add another to the collection..."
Monday
Andrew Rabbitt commented on F. C. Bearsch "Tearig"'s blog post A Microsoft Vision of the Future...
"What happened to all the fat, ugly, diabetic, cripples in this future?  Did they get popped off by the killer drones or has technology fixed their ailments?  Perhaps if we all wear gen-2 Google glasses everybody can be real-time…"
Sunday
Andrew Rabbitt replied to matt wollam's discussion Long Endurance
"Start small and work your way up, Matt.  Nothing wrong with running an APM in a foamie for a while, moving on to a gas-powered Telemaster or similar, before you progress to your ultimate goal. Along the way you'll learn a whole heap of…"
Feb 26

Profile Information

About Me:
Mechanical Engineer with more than a decade in electronic engine control development and application in the OEM sphere. I am a lapsed PPL(A) and currently an experimental aircraft builder (Van's RV-8). UAV's are a fascinating diversion from rivetting...
Please tell us a bit about your UAV interest
Inspired by press articles earlier this year on near-space ballooning, I would like to one day send a UAV glider aloft for a positionable return to land. I'm sure others have similar ideas.
Hometown:
Melbourne, Australia (sometimes)

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Andrew Rabbitt's Blog

Digital flight control research from the '80s

Posted on March 2, 2015 at 4:25am 11 Comments

I tripped over this on my suggested links and thought it might be of interest to the DIYD crowd.  Fascinating to see an original Macintosh being used as a ground station!

Telemetry Radio Range testing with home-made dipole antenna

Posted on April 28, 2014 at 11:10pm 14 Comments

On Sunday I spent the morning self-consciously traipsing around my brother's neighborhood with an apparently wierd collection of hand-held electronics and foam in the form or my APM, battery and a Hextronic 3DR knock-off 915MHz telemetry radio and Skyfun fin. We left a laptop on the top floor of the house running APM Planner with the base station radio connected directly to the USB port and using a standard "duck" monopole…

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1300kJ/kg Battery - from the Too-Good-to-be-True Newsdesk

Posted on April 28, 2014 at 5:01pm 15 Comments

This smartphone-sized pocket battery is being marketed for emergency starting of cars with flattery-battery-syndrome, but if the manufacturers specs are believable it would make a fantastic power pack for quads etc.  More than…

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Mercedes Benz vision systems research

Posted on October 4, 2012 at 9:30am 4 Comments

I saw a feature about Mercedes-Benz collision avoidance vision systems research on the Telly here in Germany where I am at the moment. 

 

This particular project uses two cameras to create stereo vision.  Comparing the two images is used to detect pixels that represent motion that could be hazardous to the vehicles current path.

Unfortunately,…

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Comment Wall (3 comments)

At 6:15am on February 11, 2012, Paul Marsh said…

Oops.  Wrong URL in my PM to you.  Try this:

http://www.poweredmodelairplanes.com/outline.wrl

Paul

At 6:32am on June 17, 2013, Acorn said…

Andrew - Thank you for commenting on my BLOG DIY Passive Gimbal.

How about whacking four free-spinning electric motors on it? One flanking each axis? Just so it is balanced. Would they cancel eachother out? Or would making them spin CW / CCW to each other be better?

At 5:57pm on November 20, 2013, Justin Martin said…

Hello Andrew! Thanks for the support, and offer. I will definitely keep you in mind if anything comes up. The Idea behind the albatross is open. By this I mean, it has specific goals and design elements, however in the long run I would truly like innovations to be customer based. For instance, If customers started laser cutting their own internal storage shelves/formers, and/or other mods, such as a dome/nose adapter.

If the Pro version every comes to be, I will definitely be needing some specific arts, such as retaining clamps and rings for easy quick-release style components.

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