Good day to all, Im new here in this great forum, been reading the previous posts, blogs and articles for a while now, and they are extremely useful for a UAV Newbie like me.
Im currently doing a project at college, and I need your help.
First things first; the aim of the project is to collect weather data from high altitude and retrieve the instruments/data back to launching point safely. This will be done via an UAV attached to a weather balloon that will descend up to a certain altitude and cut itself free and glide back to Launching position. Data collected will be via temperature sensors and camera taking picture of the horizon (hopefully)
After surfing the internet I found only one similar project (done from 7 years ago):
As design and aerodynamics is not exactly my field, I need your help in designing the high altitude glider/plane.
•Receiver, servos, battery, all Ardupilot stuff and Xbee.(didn’t buy them yet so you tell me how much they weigh??)
•Servos(super sub-micro 6g each)
•Parachute (~170 g)
3.Balloon Payload: the total weight of the whole setup shouldn’t be more than 3kg, preferably <2.7kg.
4.Range and altitude:
•Range: most probably it will travel +/-10km horizontally.
•How high: targeting 10-15km above sea level.
5.Speed: Doesn’t matter for me as long as it is stable.
6.Launching area/terrain: a Soccer Field or desert
•Using a silicon rubber bungee cord or Hand launching (for the testing phase).
•Attach it to a Helium Balloon and let go of balloon at certain altitude.
8.Control system: RC (on takeoff and landing) and Ardupilot, but I will discus that on the Ardupilot forum as I have some questions about it.
9.Engine: I don’t want to use an engine (more weight; engine and battery) but will I need it any ways? Maybe while testing!
10.Rescue system: Parachute opens at a certain altitude; for smooth landing (max landing speed: 5m/s)
11.Material available for construction:
•Foam(dense and normal)
•High strength unidirectional Carbon Fiber (density=1.78g/cm^3, thickness=0.12mm).
12.What I think might be a good design:
•(I think) I want to build something made up from balsa wood/foam and carbon fiber, to be light and endure the high vibration and flexing of the wings at high altitudes.
•Is something like this is good? (Enough space for everything, but way too heavy).
•Should I go with a T shaped or a V shaped tail?
•Should I go with a Rudder, flaps and Ailerons
•Looking for previous designs, plans and advice.
Waiting for you replies