Time of Year: Optimal meteorological conditions occur from November 1 to
March 1 when the jet stream winds, the primary source of propulsion for the
balloon, blow in a west to east direction.
Altitude: The balloon will travel within the jet stream at an average
altitude of 33,000 feet.
Speed: The jet stream moves at a ground speed of up to 250 miles per
hour, with an average speed of 70 miles per hour.
Outside Air Temperature: Minus 65 degrees Fahrenheit
Flight Duration: Assuming the flight trajectory moves in a straight west
to east direction, and given that the distance around the earth at 31 degrees
latitude is approximately 20,000 miles, the balloon could circumnavigate the
earth in 12 days. However, the likelihood of flying in a direct west-east
weather pattern, without moving north or south, is slim. Therefore, the
flight could take as long as 21 days.
Design: The balloon is a De Rozier, which was a system designed by Jean
Pilatre De Rozier of France in 1789. It utilizes both helium and hot air.
No one has ever flown a De Rozier balloon of this size under these altitude
and flight duration conditions.
Height: 206.64 feet or 63 meters Diameter: 127.92 feet or 39 meters Capacity: 32,000 cubic meters or 1.1 million cubic feet
Color: White Registration: G-GLBL Fabric: The balloon envelope is made from a high tenacity polyamide
fabric coated with a polyurethane compound, and an outer layer of aluminised
melinex industrial film. This new laminated fabric has increased protection
from ultraviolet light and cuts down on gas leakage.
Design: Designed by Per Lindstrand, the capsule is pressurized to an
equivalent interior atmospheric pressure of 8,000 feet. It is constructed of
aluminum. There are two propane-powered engines driving compressors which
maintain the inside pressure. The capsule is a bi-level construction. The
lower level serves as the sleeping quarters, toilet facility, storage space,
and access hatch. The upper level is the piloting center with balloon control
panels, navigation, and communications equipment.
Fuel: Six fuel tanks are mounted outside the capsule. They contain the
propane gas that will power the balloon burners. Height: 10.8 feet Diameter: 9.5 feet Weight: 4,400 pounds Fuel Cylinders: 2,060 pounds
Total Weight: 12 tons or 25,000 pounds Total Estimated Lift at Launch: 13.5 tons of lift Total Estimated Lift at Float Altitude: 12 tons
Inmarsat Standard C: Utilizing standard Global Positioning Satellite
Systems, this unit provides real-time tracking of the balloon's exact position
and speed. This two-way satellite communications system also enables data
transfer and E-mail between the capsule and the ground.
Inmarsat Standard M Satellite Phone: Allows for voice communication
between the capsule and the ground.
HF Radio: With an estimated 6,000 mile range, this system has an air
traffic control contact over the Pacific and Atlantic Oceans.
VHF Radio: With a range of 200 miles this communications system allows
for air-to-air and air-to-ground communication. It also is the means for Air
Traffic Control communication in the United States and Europe.
Ozone instruments will be taken along to measure the presence of
halocarbons in the atmosphere.