Andrew Rabbitt
  • Male
  • Melbourne, Victoria
  • Australia

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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

Andrew Rabbitt commented on Jose Luis Cortes's blog post Successful flight test of gas+electric VTOL UAV: HYBRiX
"I don't understand the negativity in the comments here.  It's obviously a work-in-progress for the guys and has some considerable potential - leaving aside the comparisons with traditional helis etc. I think it's fabulous that…"
Andrew Rabbitt commented on Chris Anderson's blog post Robot Dragonfly, RIP
"Ah, manufacturing in volume is hard and doesn't seem to pay so well.  So that's why the west has abandoned it to China...!"
Nov 8
Andrew Rabbitt commented on Chris Anderson's blog post Proof that you can get a research grant for anything with the word "drones"
"When the batteries run out, the newly built house of cards collapses..."
Nov 8
Andrew Rabbitt commented on Chris Anderson's blog post UK Police: FPV is "an offense"
"I think a 72Hz radio might have a bandwidth problem..."
Nov 3
Andrew Rabbitt commented on Applied Aeronautics's blog post The Albatross UAV - Ready to Launch
"If you spec the motor and propeller well and aren't trying to break speed records, why would you think you had a cooling problem?"
Oct 26
Andrew Rabbitt commented on Applied Aeronautics's blog post The Albatross UAV - Ready to Launch
"Congratulations on beginning to ship, Justin!  I don't think anyone who hasn't done it before really understands what it takes.  Well done!"
Oct 23
Andrew Rabbitt commented on Pedals2Paddles's blog post Drone crashes outside White House, existing laws applied, owner cited.
"That's three tenths a bomb!  All it needs is Ahmed's clock and a bit of er um... Won't someone think of the President's children...?"
Oct 10
Nikita replied to Andrew Rabbitt's discussion When in HIL, APM is still getting IMU data from Oilpan, not X-plane - Why?
"Hi criro,  I got the same issue . Did you managed to find a solution ? Cheers "
Oct 7
Andrew Rabbitt commented on Doug Hunsaker's blog post Why sweep hurts endurance and what to do about it
"Interesting video Doug.  Of course you can recover much of the ideal lift distribution by washout profiling."
Sep 25
Andrew Rabbitt commented on Gary Mortimer's blog post AC 91-57 be gone, welcome AC 91-57A
"It's worth noting that the "A" in "AC" stands for advisory"
Sep 2
Andrew Rabbitt commented on Andrew Tridgell's blog post An awesome day at CMAC
"Looks like waaay too much fun!  I'm sure there must be a clause in CASR101 agin it"
Aug 31
Andrew Rabbitt commented on Gary Mortimer's blog post Alleged RPA/manned aircraft strike in USA
"Interesting that there are two distinct damage areas probably about 150-200mm apart and one less than another.  I don't know what this might imply of the object that hit it, but I would suggest that whatever it hit needs at least two…"
Aug 30
Andrew Rabbitt commented on Chris Anderson's blog post Mexican President gives Jordi Munoz top young entrepreneur award
"Awesome stuff.  Congratulations Jordi!"
Aug 18
Andrew Rabbitt commented on Thomas J Coyle III's blog post Mayflower Autonomous Research Ship to cross Atlantic without a crew
"Sorry Sam, it was just a facetious interpretation of their claim to have "onboard collision-avoidance systems""
Aug 16
Andrew Rabbitt commented on Thomas J Coyle III's blog post Mayflower Autonomous Research Ship to cross Atlantic without a crew
"It will have a collision avoidance system but only for those onboard..."
Aug 16
Andrew Rabbitt commented on Colin Snow's blog post Brief Survey on ADS-B and Small Drones
"Is it possible/legal to broadcast ADS-B from the ground station?  Presumably the ground station already knows where the UAV is and it could broadcast at a much higher power level than might be available onboard."
Aug 12

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.
Melbourne, Australia (sometimes)

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Andrew Rabbitt's Blog

Exploring the secrets of flying wing design with CFD.

Posted on July 28, 2015 at 9:36pm 44 Comments

The flying wing design I have been working on for some time now has been slowly evolving as I have learned more about aerodynamics and expanded my skill set with modelling tools of various forms.  I have recently completely re-surfaced my design with new aerofoil sections and better, more consistent surface…


Wing lift distribution presentation

Posted on March 27, 2015 at 12:50am 11 Comments

A very interesting and thought provoking explanation of why the conventional wisdom of elliptical lift distribution needs rethinking.  Interesting for lovers of fixed-wing but also might be applicable for propellers and rotors...?

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…


Comment Wall (4 comments)

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

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


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.

At 8:01am on April 23, 2015, Paul Meier said…

Hi Andrew

I have seen your pic of the qx 100 teardown. I want to teardown my qx 10 but before I do may I ask do you think it is possible to soldier a connection on where the shutter button is (on the flexible printed circuit) and then use pixhawk to trigger ?

Many thanks in advance,


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