Scientific balloons

fhsu.edu

Scientific balloons

Scientific balloons

Bryan Figger, Jon Folkerts, Brent Risting

Dr. Paul Adams, Dr. Jack Maseberg


Things that fly…

• Nature: Birds, bats, and insects


The Fall of Icarus

Pieter Pauwel Rubens, 1636


Things that fly…

• Human innovations:

http://martinjetpack.com Daedalus, MIT, 1988 (70 miles, 4 hours)


Things that fly…

• Human innovations:

– Fireworks (~600 A.D.)

– Rockets (~1200 A.D.)


Things that fly…

• Human innovations:

– Airplanes / Jets

– Helicopters

Jacques and Louis Breguet,

Gyroplane No. 1, 1907

First flight at Kitty Hawk,

North Carolina on

December 17, 1903


Things that fly…

• Human innovations:

– Sky lanterns (~300 B.C.), partial demonstration…575K


Things that fly…

• Human innovations:

– Hot air balloons (~1783)

Early balloon designs (1818)


Things that fly…

• Human innovations:

– Hot air balloons (~1783)


Things that fly…

• Human innovations:

– Hydrogen / Helium balloons


Things that fly…

• Human innovations:

– Hydrogen / Helium airships (blimps, zeppelins)


Things that fly…

• Human innovations: (Hindenburg, 1937)

– Hydrogen vs. Helium. http://www.airships.net/hindenburg/interiors


Things that fly…

• Human innovations: (Hindenburg, 1937)

– Hydrogen vs. Helium, safety first!


Why do balloons fly?

Archimedes of Syracuse

(212 B.C.)

Buoyancy = weight of displaced fluid

Isaac Newton

(1687)


Buoyancy

Conditions for buoyancy:

1) A fluid must be present (air)

2) An object must be free to move in the fluid (balloon)

3) The object and fluid must be subject to a force (gravity)

A. L. Lehman et. al., Am. J. Phys. 56, 1046 (1988).


Why do balloons fly?


Why do balloons fly?


Why do balloons fly?


Why do balloons fly?


Free body diagram


Free body diagram


Ascent rate: 980 ft/min

Descent rate: 3500 ft/min

32 °F to -80 °F


NASA atmospheric data


Altitude

Mount Everest 5.5 miles

Commercial Jet 6.5 miles

Our balloon 16.6 miles

ISS 230 miles

Radius of Earth 3963 miles

Moon 230,000 miles


Distance to Horizon

h d

R

R


• Trajectory predictions:

Balloon Motion

http://habhub.org/predict/


Balloon Records

• 1 st US transcontinental (& 1 st transatlantic) amateur radio

HAB (Dec 11, 2011)

California > Mediterranean Sea, 6,236 miles in 57 hours

Near Space Project flight number CNSP-11

(call sign K6RPT-11, www.aprs.fi)


Hays, KS


It’s a bird. It’s a …


Videos:

www.fhsu.edu/physics


• Cosmic rays

Future Goals

• Video streaming in real time

• Collect bacteria at high altitude

• Payload stabilization with gyroscopes/CO 2

cartridges

• Panoramic images, fish eye lens, etc.


• Special thanks to

– Paul Verhage

Future Goals

– Naomi Kitzis and Lianne Zwenger

Dr. Timothy Rolls

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