Create a modular fixed wing drone from scratch that is easily
Achievable in a Fab lab (by a non specialist member)
Modifiable
Transportable
Reparable
Reproducible (to create a fleet of drones)
The figure 1 shows a hand sketch for a modular drone.
Figure 1:
3D overview drone design 1
For more information on this design and other modular designs check the Hand sketches page.
Aims
Help including local communities in the process of environmental conservation efforts.
Design and construction of drones for big conservation projects are currently done by either
Universities
Companies
International NGO
and seldom by local communities. The drones, made or bought, are usually transported to the place where the conservation mission take place.
Example: the Air Shepherd project
In the Air Shepered project, drones are used by trained pilots to spot poachers by night in National Parks protected areas.
The drones carries infrared camera, allowing operators to detect humans in the dark.
The operators then transmit the information to rangers that deploy in the area and prevent the poaching.
This approach is efficient as the sole presence of a drone in the sky act as a deterrent for poachers (which might get killed in combat with rangers).
The drone are produced and operated by trained pilots of UDS, which “work with locals to identify threats to elephants and rhinos”.
What are this threats? According to Air Shepered website poaching generate an estimated 70 billion dollars benefice a year on black market. One pound of Rhino horn, which is associated to medical myths, is estimated to be worth 30 000 dollar on Asian black market.
Why?
I believe that the implantation of a Fab lab could create an ecosystem which benefit both the conservation effort and the local communities.
Example: the Air Shepherd project
In Fab lab, members could create simple to build, yet functional, fixed wing drones. Add training for local pilots, and the community could make a fleet of remotely controlled drones to fight again poachers at night.
This surveillance drones could also be used by day for FPV (First Person View) tourism. The advantages are the following:
medium altitude flight could allow for stunning aerial view and video of wildlife and local flora (for tourists, bloggers, documentaries), with less impact then traditional safari using cars.
Sharing publicly the video could help researchers monitor biology status (i.e. abnormal changes in fauna or flora).
Locally trained pilot and ranger could provide dual controls for remote or on the spot tourists that could choose the zone to explore.
Locally trained pilot could enforce local law on drones and assure safety for the flight.
This could create an alternative to poaching for local communities to earn money.
How?
First idea
With a website teaching Fab lab members “How to build a modular drone for a conservation mission from scratch”.
Specification for the website
The first page should allow the user to specify the machines that are available in her/his Fab lab. The minimum vital machine required for this project is a laser cutter.
Each page should teach a significant step in the process of drone design. I will follow the structure of the book [1] to design a small unnamed fixed wing aircraft. Example for the process of drone design:
Goals and constraint
Airworthiness
Likely Failure Modes
Aerodynamics and stability Failure
Structural Failure
Motor Failure
Control system Failure
Systems Engineering
Work-breakdown Structure
Interface Definition
Allocation of responsibility
Requirements Flowdown
Compliance testing
Cost and weight Managment
Design “Checklist”
The parameter chosen by the users should automatically start parametric CAD files.
The last page should allow the user to download:
.svg files for laser cutting most parts of the airframe,
.stl files for 3D printing for parts of the airframe with complex shape (nose/rear/propeller),
other files according to the machines that are available in the Fab Lab.
Second idea
Design a parametric drone using opensource softwares and document its conception, construction and then operation.
Specification for the drone airframe
Modularity
This is the core principle of my project and it should allow:
Ease to build for the whole drone by assembling simple modules
Fast building by allowing parallel builds of modules
Ease to transport by stacking the modules in boxes
Isn't this project (way) too ambitious for fab Academy time frame?
Rational answer
I am planning to adapt a design of a fixed wings drone to a modular fixed wing drone.
This should allows to avoid full deadlock on the project by switching from one module to another module.
I will not initially start from scratch for my first design (but I will teach how to do it).
I have some technical background with drones:
Outside of this gap semester I am a PhD student working on how to develop a strategy for searching and tracking multiples moving targets using a fleet of cooperative drones. More info in this page.
I am a member of a club for model aircraft making and flying. I have already make and fly drone from kit. I can also use the knowledge and advice from expert pilots (one is a professional fixed wing drone pilot for the army) and expert builders (some of them build and fly radio controlled jet aircraft, with working replica of a turbojet engine).
I will follow the steps of the book [1] to design a small fixed wing drone and will adapt them to meet the assignments of Fab Academy 2020. See this page for my planning.
Less rational answer
Modified citations
“Shoot for the moon. Even if you miss, you'll land among the stars [in dark cold outer space]”.
Which is OK because “In space, no one can hear you [cry]”
Figure 2: In spaceno one can hear you scream [after two hours trying to solve a bug in your code]
(Card from the excellent board game Galaxy Trucker)
Original citations
“Shoot for the moon. Even if you miss, you'll land among the stars”, attributed to Oscar Wild
“In space, no one can hear you scream”, tagline for the movie Alien, Ridley Scott's 1979.
Covid 19 lockdown
It is where the switch happen between first and second idea for the final project.
The Digiscope Fab Lab was closed for 3 months due to Covid lockdown here in France.
I was planning to make several drones versions and test them at the club location.
But the club was also close during lockdown.
So I ended with 2 days, instead of a full week, for each assignment from week 7 to 18 and then keep one week for the final project.
Note: the design I made during Covid lockdown needed adjustements that can only be checked after the part is produced with the machine of the Fab Lab.
List of possible and probable failures
The final fixed wings drone is:
Too heavy
Too fragile
Too unstable
A pain in the assembly ^^
Fallback
My B plans if some of the failure above happen and seem impossible to fix: