Krzysztof Bosak's Blog (42)

Comments, debunking and alternative proposal for Amazon's revision for airspace model.

Revising the Airspace Model for commercial drone integration

This paper is also containing superior solution exitisng Amazon's patent…


Added by Krzysztof Bosak on December 13, 2016 at 12:30pm — 12 Comments

Forced to publish 2016 ESNC contest entry: Stratos Shuttle – looking for sponsors or investors

Hi All,

Being very experienced avionics designer with significant operational drone experience including stratospheric airdrop, I have tried to contact Polish space3ac fund asking for funding. I was blocked on facebook march 2016 after asking the first question by coordinator who knew me as being whistleblower.

You can find entire entry under the link describing the idea:…


Added by Krzysztof Bosak on November 30, 2016 at 9:30am — 27 Comments

USGL Unmanned System Ground Level

Testing my implementation of global virtual airspace for autonomous drone navigation.

1. Grand Canyon, AZ, US

2. Sobótka mountain, S-W Poland (with a few airspace elements in the background)

3. Bellevue, WA, US

Blue net is USGL for symmetric navigation properties based on 10m DEM satellite radar and airborne LIDAR data.

Ground level is generated by obeying a few simple geometric principles that guarantee an automated system with specified…


Added by Krzysztof Bosak on November 20, 2016 at 4:00pm — No Comments

Krasiczyn Castle 3D model, Poland

Melown maps: a new 3D reconstruction method for interactive 3D digital surface models.

Guys, check out the newest sample obtained from the photos I have gathered almost a year ago. It took some serious research effort because the area is very difficult (many trees and vertical object) and we were testing 3D reconstruction from strictly oblique imaginery gathered…


Added by Krzysztof Bosak on April 7, 2014 at 2:30am — 10 Comments

50km motorway mapping flight in Poland by FOTOMAPY

An example of our current mapping operations...

Things have evolved a little since August 2010.

Historically we did that:…


Added by Krzysztof Bosak on July 22, 2013 at 9:30am — 8 Comments

World’s Largest Valentine Heart with Dedication (for asena21)

Take a look at

Valentine Heart with dedication has been crafted on the sky using autonomous UAV.

Well beyond visual range, below frost point, in dense fog. Somehow it worked, over wast swamps near Wrocław, Poland (pronounciation: WrocLove).

The webpage looks like a quick mash-up but it's there. 4x3km, at 300m AGL.

A movie will come a few days later.…


Added by Krzysztof Bosak on February 14, 2013 at 7:30am — 11 Comments

Converting antennas between different XBEE PCB styles.


I was able to obtain certain number of XBEE PRO modules at 50mW with wire antenna, no chance to get them with SMA antenna. However I would like to solder a specific connector. Unfortunately, the PCB layout is different:

Type A is for SMA, uFL and WIRE     

Type B is for Small PCB patch antenna, uFL and WIRE…


Added by Krzysztof Bosak on July 26, 2012 at 4:08am — 5 Comments

Dug out the first Micropilot autopilot, MP1000, around 1999

The question is, what is that little bulb in the middle?

Added by Krzysztof Bosak on June 26, 2012 at 11:30am — 16 Comments

EagleTree FDR file format

Hi all,

many of us are using EagleTree data recorder. Sometimes I have several logs that I need to merge between the autopilots and EagleTree. The manual states that you can contact them about file format and they will respond. Unfortunately this is not the case. Therefore maybe somebody has a clue about what the file content means:…


Added by Krzysztof Bosak on June 1, 2012 at 7:30am — 7 Comments

PPBSL 2012 Polski Przegląd BSL - 'Polish UAV Meeting'

...will tak place 22th to 27th May 2012 in Pałac Kultury i Nauki, Warsaw.

The exhibition will be physically located in Museum of Technology  inside this monumental building.

The Museum is recently known for organising countrywide meetings that have spin-off potential and highly technological subject.…


Added by Krzysztof Bosak on May 12, 2012 at 10:00am — No Comments

Searching for airframes for unmanned surveillance heliopters

Hi all, I wonder what is the availability on the market of semi-industrial grade RC helicopter bodies.

For example like this one, Aquila UAV from UAVS Poland.

Is it possible to buy something resembling this off the shelf, with holding space for a gimbal cam in the nose?…


Added by Krzysztof Bosak on May 2, 2012 at 12:17pm — 21 Comments

Terrain Following using FLEXIPILOT - milestone flight report

2012-04-23 at 19PM GMT+1, FLEXIPILOT (my own closed-source development) with special Terrain Follower firmware, controlling EasyUAV, has made its first long duration loiter at 1.5-3m AGL above sloped terrain. Loiter diameter was around 110m.

10m Flight took place in steady weather, while norhtern part of the field was 4-5m higher than southern part of the…


Added by Krzysztof Bosak on April 29, 2012 at 9:30am — 2 Comments

38min loiter with EasyUAV at 3m AGL and analysis (found low ESC resolution!)

Hi all.

I have made a long run at 'human flight level'.

The machine is basically EasyStar with FLEXIPILOT but the discussion applies to anybody using typical hobby grade ESC. The plane is equipped with RAY 2845 inrunner motor and RAY 25 ESC, same as JETI ECO 25. Runs on Kokam 4Ah SPLB 30C. The plane is equipped with humidity and external temperature…


Added by Krzysztof Bosak on March 23, 2012 at 10:00am — 13 Comments

Servo precision - finding low current draw, low/any speed, <<<minimal loose-very precise>>> standard or mini servo.

Hi all,

I am unable to find exact information about servo tolerance.

For example very popular Futaba 3001 tend to have a lot of loose because ot the gear precision, yet when they run all is ok (besides that they are slow).

On the other hand Hitec HS-425 appears to me to have null loose.

Hitec HS-225 have little loose and is very fast servo, but in order to hold its position requires huge power.

Most digital servos tend to be either slow and fast, but have…


Added by Krzysztof Bosak on March 21, 2012 at 12:00pm — 5 Comments

Predator Drone Court-Martialed For Afghani Civilian Deaths


Not sure if it was posted before, looks it wasn't. Enjoy.

Added by Krzysztof Bosak on February 17, 2012 at 2:09pm — 17 Comments

RC range simulation at ground level.


we have performed RC range simulations for 2 systems:

35MHz, 2.5m mean antenna height, 1m receiver height (vertical mast on the UAV)


2.4GHz, 2m TX antenna height, 0.5m receiver height (short antennas)

in order to simulate it over a vast terrain we know and use.

The range plot was made from 4km2 elevation model made by Pix4D and Pteryx UAV.

Treat it as a kind of reminder of what happens when landing using FPV.



Added by Krzysztof Bosak on December 27, 2011 at 7:00pm — 6 Comments

Vickers Wellington UAV


Vickers Wellington as UAV

Bi-motor airplane serving as test platform for FLEXIPILOT.

Used for testing single-engine failures and tuning.

Elevator, differential ailerons, no rudder.

Endurance 50min with one battery.

Cruise speed 50km/h.

Shown loiters at low altitude since at typical cruise altitude of 200m it…


Added by Krzysztof Bosak on December 20, 2011 at 5:00am — 5 Comments

Fournier RF-5 as UAV

Fournier RF5 as UAV

A low-wing stall-prone (due to specific airfoil) motoglider, flown without Pitot Tube.

Endurance 30-45min with one 4Ah battery, but it is so efficient it would fly easily for well above 1.5h.

Yet, I don't like the fact you have to throw it overhead so it will stay limited.

Cruise speed 45km/h.



Added by Krzysztof Bosak on November 21, 2011 at 5:51am — 7 Comments


Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

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