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

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 SKYBORNE May 6, 2016. 6 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 replied to Forrest Frantz's discussion Duration World Record for Electric Multicopter Flight Duration 4 1/4 hours--How We Did It
"Wow!  Some real engineering.  Great to see and congratulations!"
Aug 26
Andrew Rabbitt commented on Nicolai Valenti's blog post Projecting Hybrid aerial vehicle for human transport
"What makes you think Wankel engines are highly efficient? They are an appalling choice for thermal efficiency if that is your main focus. 40% brake thermal efficiency is what really good automotive diesel engines are achieving. At the power levels…"
Aug 10
Andrew Rabbitt commented on Josip Nunth's blog post Boeing cargo Drone Prototype. Does this make sense?
"Boeing spent $5.25 at BangGood and got millions of dollars-worth of publicity.  Sure, it made sense!"
Mar 30
Andrew Rabbitt commented on Jack Crossfire's blog post The 1st fatality caused by a self driving car
"Thing is, you can take your own measures to avoid tree shredders.  If you choose to jump into the feed hopper, you're not really acting rationally and neither was this cyclist-cum-pedestrian. If the car had been being driven by a…"
Mar 25
Andrew Rabbitt commented on Charles Blouin's blog post 10 km high flight with a 1kg quadcopter!
"Ravi is not right.  Propeller aircraft can go to 50000 feet.  Google Grob G520 if you don't believe me."
Mar 25
Andrew Rabbitt commented on Jack Crossfire's blog post Skydiddy startup
"seriously impressive!"
Feb 21
Andrew Rabbitt commented on Omax 12's blog post Variable Pitch Drone Setup Series
"that's not a very encouraging way to state your prior experience..."
Feb 15
Andrew Rabbitt commented on Abhinav Pandey's blog post CF flying wing
"What does it do that all the other flying wings out there don't...?"
Feb 11
Andrew Rabbitt commented on Charles Blouin's blog post Pacific Drone Challenge
"Well, you could adopt an albatross strategy and include perching to solar-recharge, dynamic soaring and thermaling to do the business."
Jan 17
Andrew Rabbitt commented on Yana Tang's blog post Intelligent Electric Unmanned Helicopter "PARUS " released
"What caused the great concern...?"
Dec 19, 2017
Andrew Rabbitt commented on jlcortex's blog post HYBRiX, 3 hours and 35 minutes flight time in hover
"Nice work!"
Dec 14, 2017
Andrew Rabbitt commented on Luka's blog post KapetAir VTOL test flight
"Nice machine!  Can it do a 60km round-trip mission inside 45mins...?"
Nov 28, 2017
Andrew Rabbitt commented on Alex Williams's blog post Open source underwater glider
"Awesome work Alex!  Congratulations"
Oct 16, 2017

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

Climb-Glide: Improving the range of fixed-wing, electric UAVs

Posted on September 18, 2016 at 12:56am 21 Comments

A climb-glide routine can potentially yield a useful increase in range compared with the same airframe/propeller/motor combination operating straight-and-level at best range speed point or best endurance point respectively.

Let me explain briefly with graphs of the results how I have…

Continue

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…

Continue

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!

Comment Wall (4 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.

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,

Paul

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