1. Project 250 High Altitude Challenge
Lane Ellefson, Andy Guymon, Claire Martin, Brandon Trainer, Cate Whiting, Madison Wieczorek

2. CONCEPT Project 250 is a lightweight, efficient payload for a HAB
The goal is to achieve an altitude of 125 thousand feet.
Our team is attempting to create the lightest payload possible, while meeting all requirements.
The goal is to have an extremely lightweight initial design, to save weight for a good camera.

3. Objectives Adhere to all laws and comply with FCC/FAA regulations
Be tracked with APRS throughout the flight
Include multiple ways of locating the payload on ground
Return photographic evidence of the entire flight
Measure inner/outer temperature and pressure
Survive 10-g omni-directional accelerations
Be reusable
Measure acceleration (3 axis)
Have mass < 250g including parachute/lines
Minimize instabilities
System should return a live picture*
Payload must meet criteria for space launch*
System must be self-powered*
*future constraints (not required to be met this year)

4. Regulations and Launch
Communicable by APRS
Notification of FCC/FAA
Early morning launch time
Landed before nightfall
Helium can be acquired through donation or bought

5. Design Specifications
Approx 2 cm thick
Enough to have durability with insulation, while still being lightweight
Oblong shape
Flat base
Components will be secured through the use of space tape and double sided velcro
8 inches tall, 6 inch diameter
Enough space within for all components
3.7 Sq. In. contact patch needed to withstand a 10g impact
Radius of 1.1 inches needed

6. Payload Shape

7. Balloon We will be using a Kaymont HAB-600 balloon
Can lift a 500g payload to at least Ft.
Should be able to lift a 250g payload to Ft.
We will either be using Helium from Airgas Welding supplies or Hydrogen From A & B welding

8. Camera GoPro Stripped to the lens and motherboard
In order to prevent clouding of the lens, appropriate insulation must be used
SD card to record images captured, with a photo taken every 5 min

9. Means of Location Radio Bug Eagle Flight Computer
Transmits speed and location every minute
Connects directly to Eagle Flight Computer
Eagle Flight Computer
Equipped with GPS locator system
Functional to a max altitude of 262,500 ft
20 hour battery life
Audio Beacon Kit (High Altitude Science)
Emits loud beep for easy on ground location
Powered by 9V Battery Energizer Ultimate Lithium Battery
Battery life of 12 days

10. Payload measurements Temperature/Pressure (inner)
Eagle Flight Computer includes Temperature/Pressure Sensor
Plugs directly into the Eagle Flight Computer
Automatically recorded
Temperature/Pressure (outer)
RadioBug
Transmits once every minute
Acceleration
Adafruit 10-DOF IMU Breakout
3 axis gyroscope
3 axis accelerometer
3 axis compass

11. Parachute Spherachute Balloon Parachute 2 ft in diameter
Calculations are based on 15 to 20 ft./sec. descent.

12. Cost and Weight Totals
Slightly high cost, yet it makes up for this with an incredibly low weight, opening up options for potential experiments for Stage 3

13. Potential Experiments
Analysis of High Altitude environment
Moss
Effects of radiation
Newly germinated seeds
Long Exposure Space Photography
Use a lightweight yet high quality camera (classified) to acquire an extended shutter speed
Paired with large aperture

14. Feasibility Weight Budget: 250 grams
Our payload is well within weight restraints, and it will be easy to acquire and put together.
Team members have easy access to appropriate materials to create the payload
Lightweight brings many options for future experiments in Stage 3

15. Questions?