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Lester Haines's Discussions

Pixhawk Zener diode - a stiff brandy and assistance required

Started this discussion. Last reply by Lester Haines Jun 1, 2014. 2 Replies

A quick call for assistance regarding connecting a Zener diode to condition power on the Pixhawk servo rail.…Continue

 

Lester Haines's Page

Latest Activity

Lester Haines commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"@Andrew - A mad idea, but strangely attractive. Doable, but we'd need a completely different launch set-up/release mechanism for such a flight - the latter being the big challenge. I'd go for 5,000m or so for starters, just to give the…"
Jun 18, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"@Lester, when I told Rob and Randy about this project they raised the idea of also strapping a small quadcopter (maybe a 250 size?) to the payload, then releasing both plane and copter at the same time. It would then be a "plane vs copter"…"
Jun 18, 2015
Lester Haines commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"@Paul The RFD 900 is too big to fit in the aircraft. Here's the inside of the fuselage before we fitted the radio: http://regmedia.co.uk/2014/03/05/vulture_avionics_rig_annotated_big.jpg"
Jun 17, 2015
Joe Breznai commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"Ryan, check out the link to the LOHAN site."
Jun 17, 2015
Ryan Biddle commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"very cool project. Its got my mind racing with ideas. ever considered the payload be a fixedwing drone? launch up to 31k then see how far you can get lateraly?  Thanks! *new to the forum. hope to learn a lot here* -Ryan "
Jun 17, 2015
Paul Meier commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"GREAT stuff.... I understand that you are using RFD 900u on the air, what about on the ground ? And why are you not using the normal RFD 900 on the air ? Cheers, Paul"
Jun 17, 2015
Petr Hubacek commented on Lester Haines's blog post PRATCHETT soars to 31,000m for Pixhawk test flight
"hello, I like this activity. Could you please correct the link abowe with more photos? There is missing char ":" in the http that makes link not work :)"
Jun 17, 2015
Lester Haines posted a blog post

PRATCHETT soars to 31,000m for Pixhawk test flight

Our Low Orbit Helium Assisted Navigator (LOHAN) project is in good shape following last Saturday's PRATCHETT avionics test flight, named in honour of the late Discworld author Sir Terry.…See More
Jun 17, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"One of the major aims of the test flight was to test the comms link, so we could be confident of being able to control the aircraft in the final Lohan mission. The radio setup was a RFD900 running at 27dBm on the ground station, with a 6dBi yagi.…"
Jun 14, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"Next up the roll and pitch, giving us some idea of how much the balloon swung, and how much it swung on the chute after the burst. Here is the overall roll-pitch graph against altitude (degrees of roll/pitch, altitude in meters above sea level) Here…"
Jun 14, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"I've started having a look at the DF log from the flight. Here is a temperature plot from all the logged temperatures. The airspeed sensor got to -48 degrees C at an altitude of around 18km. The other sensors stayed much warmer as they are…"
Jun 14, 2015

Admin
Gary Mortimer commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"I think I would be inclined to shoe horn an NTX2B in there for some distributed tracking goodness. I can't remember is there one in the main aircraft? @Melih hyper pressurized floating balloon project Do tell more in another thread!"
Jun 14, 2015

3D Robotics
Chris Anderson commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"I think that's an altitude record for Droneshare ;-) "
Jun 13, 2015
Lester Haines commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"Fantastic work by Edge Research Lab and Andrew Tridgell. Beers all round, and details on the mission to follow."
Jun 13, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"Many thanks to the great team from Edge Research Lab for their flight today! http://www.edgeresearchlab.org/"
Jun 13, 2015

Developer
Andrew Tridgell commented on Lester Haines's blog post PRATCHETT stratospheric spaceplane test mission live tomorrow
"Droneshare link for tlog: http://www.droneshare.com/mission/110896"
Jun 13, 2015

Profile Information

About Me:
Head of Special Projects Bureau at The Register
Please tell us a bit about your UAV interest
Currently working on the Pixhawk-controlled Vulture 2 spaceplane, as part of the Low Orbit Helium Assisted Navigator (LOHAN) project (http://reg.cx/1Uyg).

Plenty of photos on our Flickr page: http://www.flickr.com/photos/registerparis/
Hometown:
Los Narros

LOHAN team with the Vulture 2. From left: Dave Akerman, Rob Eastwood, Paul Shackleton and Claire Edwards

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Lester Haines's Blog

PRATCHETT soars to 31,000m for Pixhawk test flight

Posted on June 17, 2015 at 3:20am 8 Comments

Our Low Orbit Helium Assisted Navigator (LOHAN) project is in good shape following last Saturday's PRATCHETT avionics test flight, named in honour of the late Discworld author Sir Terry.…

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PRATCHETT stratospheric spaceplane test mission live tomorrow

Posted on June 12, 2015 at 2:43am 23 Comments

The final Low Orbit Helium Assisted Navigator (LOHAN) test flight -  codenamed PRATCHETT - will take off tomorrow (Saturday) from Colorado Springs East Airport at 13:30…

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Final LOHAN spaceplane test mission codenamed PRATCHETT

Posted on May 26, 2015 at 1:39am 2 Comments

We're gearing up for the final avionics test flight of the Low Orbit Helium Assisted Navigator (LOHAN) project, and have dubbed the mission PRATCHETT ("Planes Reactive Airborne Tests Checking Heuristically for Extreme Technological Tantrums") in…

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LOHAN high-altitude test flight in Exmaps

Posted on March 10, 2015 at 9:06am 2 Comments

We're obliged to the chaps down at Exmaps for sticking the data from a Low Orbit Helium Assisted Navigator (LOHAN) test flight into their "Drone Flight Logbook". The virtual two-hour High Altitude Ballooning (HAB) mission makes for…

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