"I prefer the post-video slanging match by the armchair lawyers and the society of indignant control freaks. That's much more entertaining...!"
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Andrew Rabbitt
- Male
- Melbourne, Victoria
- Australia
- Blog Posts (8)
- Discussions (57)
- Groups (1)
- Photos (33)
- Photo Albums (4)
- Videos
Andrew Rabbitt's Discussions
Measuring motor speed?
Started Mar 2 0 Replies 0 Likes
I did a search here and via Google, but didn't find anything that jumped out at me, so I ask:Is there any simple method of measuring motor/propellor/rotor speed when using a typical…Continue
On-board data logging access without CLI?
Started this discussion. Last reply by Michael Oborne Mar 3. 1 Reply 0 Likes
Now that the CLI has been done away with on Arduplane 2.something-or-other, does anyone know whether on-board data is still being automatically recordered in flash and, if so, how do we access it…Continue
Now that the DIP and Slider switches appear to be redundant...
Started this discussion. Last reply by Andrew Rabbitt Feb 26. 5 Replies 0 Likes
...can I pull off the switch block and wire/configure these ports as outputs to control my HD170 camera by pushing it's buttons via software on the APM?I plan to power the HD170 over its USB port,…Continue
Is it me, or is APM code just really hard to find one's way around?
Started this discussion. Last reply by Andrew Rabbitt Feb 20. 3 Replies 0 Likes
I'm trawling through the APM Arduplane 2.28 code base trying to locate where the PID loops are calculated and hence where the gains applied.I want to be able to implement a density…Continue
Andrew Rabbitt's Page
Latest Activity
"What airframe is Jordi mucking about with there? It does look quite cool.
Oh, and congrats, Jordi! You've changed the direction of a whole bunch of lives in the world, I'm sure."
Larry Grater commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look"Good suggestions. Hopefully we haven't hijacked the tread too badly. I'm probably limited to the current state data on APM since I'm running out of time to utilize the A-D's. I was thinking to borrow one of the current logs…"
ModeratorMonroe commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look
"I'd like to know what you find out about the Lassen unit I have several of those. Are you going to give out the Callsign so we can watch your APRS track live? Nice looking payload! :) I'd get an onboard temp reading! I'm trying to get…"
Earl commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look"We are launching ours on Tue 5/15/12 from Edgewood/Moriarty area at 8 am.
Earl
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Larry Grater commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look"HAB-APM payload for next week's launch. These are basically the harnesses from my ill fated P-51. The root cause of that is a different discussion but setup and not APM related (in order: go fever, aft cg, control throws,…"
"Perhaps the GPS can't, but the controller should be able to spot it. And what about RAIM? This should be able to detect spoofing, surely, unless it's very clever spoofing
I suspect this accident is little to do with intentional external…"
Larry Grater commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look"I have an earlier post where I've solved the 60k navigation issue. There are a few receivers that will work. I'm using a Venus GPS running 5 Hz NMEA data. My surrogate A/F is stock APM2 and the flight A/F will be APM2…"
Larry Grater commented on Andrew Rabbitt's blog post Keeping APM Operational at 120000 feet - a first look"Andrew,
Great stuff above and sounds like you're making good progress. I also noticed the X-Plane issue with using TAS. Great to know that this has been fixed. IAS is directly related to QBAR and much more useful for scaling…"
"It looks too beautiful and way too much fun Mr Pirker! I'll bet "the authorities" will hate you for it still... ;)"
"Can kites read the CFRs or do they defer to a lawyer vulture...?"
"Thanks Michael - there's a few GPS modules out there that will do high altitude but I'd like to see one that plugs directly into APM2...
My brain is too fuzzy to do this type of thing myself! :)"
"a quick scan of the data sheet suggests that it won't - disappointment! :("
"How does this particular GPS module deal with the altitude and speed limits? Will it be HAB-compatible?"
"There are no discontinuities in the atmosphere, so the airframe won't suddenly arrive at the dense air and break up. I think people think this because they are imagining what happens in orbital and inter-planetary space travel where the…"
"Hi there - static margin for a flying wing can be a bit tricky to explain, but Mr Deperrois does a good job in his paper http://www.xflr5.com/docs/XFLR5_and_Stability_analysis.pdf
I'd really suggest downloading XFLR5 and having a play around…"
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...
- 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)
Andrew Rabbitt's Photos
Andrew Rabbitt's Blog
Introducing HDwing 4 - my motor-glider for high altitude balloon (HAB) launch
Posted on March 15, 2012 at 5:00pm 16 Comments 5 Likes
Some who have followed my blog posts will know that I have been working on my HDwing design series for a return-to-launch glider concept using ArduPilot Mega. Everything I have revealed so far has been based on relatively conventional flying wing ideas. Till now...
This forward-swept flying wing concept was inspired by the work of Justin Ammon (EdgeRC / birdofprey) that I spotted on…
ContinueSlow Flight with APM - mastering the PID on the edge of stall
Posted on March 13, 2012 at 5:06am 16 Comments 1 Like
One of the features of extreme high altitude flight is the high true airspeeds that are needed to generate the dynamic pressure required for airborne flight. To minimise these extreme speeds for my high altitude glider project, I wanted to increase the flyable operation envelope closer to the airframe's stall speed, helping the reign-in the stratospheric true airspeeds!
As I was playing…
ContinueAPM-guided High Altitude Glider Drop Simulation in X-plane
Posted on March 1, 2012 at 1:30am 13 Comments 6 Likes
I've been working towards a realistic simulation of my high-altitude return-to-launch glider project in X-plane and this is the latest result which some here might find interesting.
The simulation is running with X-plane 9, APM-MP 1.1.36 (to keep the TAS into APM - more on that later) and a slightly modified…
ContinueKeeping APM Operational at 120000 feet - a first look
Posted on February 22, 2012 at 2:30am 46 Comments 4 Likes
My ambition is to send APM aloft to the edge of space on the end of a balloon, and since it gets a little cold up there, I decided to take a look at what I would need to keep things running well.
NASA have kindly given the world a mathematical atmospheric model which shows that if I can meet the challenge at -56°C, I should be OK at any altitude. Here is the temperature of the…
ContinueComment Wall (1 comment)
- At 6:15am on February 11, 2012,
Paul Marsh said…
Contests
Season Two of the Trust Time Trial (T3) Contest has now begun. The third round was a reliablilty/aerial photography round for both planes and copters, which is now closed. Stay tuned for the next round, beginning soon.A list of all T3 contests is here.
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Learning to program the …
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© 2012 Created by Chris Anderson.
