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Aggie Band freshmen, under the strict supervision of seniors
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structed this Coke can pyramid last week in Duncan. The
pyramid consisted of 821 soft drink cans.
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college station
BOYS IN
COMPANY C
FRI.-SAT. MIDNIGHT
ROCKY HORROR
PICTURE SHOW
THE BATTALION
FRIDAY, OCTOBER 27, 1978
Page 5
Computer used
to guide balloon
By GEORGE ROWE
Battalion Reporter
Helium balloons aren’t just for
kids any more, as Robert H. Bishop,
a Texas A&M University senior,
proves.
Bishop, an aerospace engineering
major, is working on a project that
involves helium balloons. They are
not the small ones kids carry
around, but weather balloons that
hold 20 million cubic feet of gas.
Bishop’s project involves design
ing methods to control balloon
flight. Bishop said that until now,
research balloons have used gas
vents and ballast to control balloon
flight. They are radio-controlled to
drop ballast or vent gas to maintain a
certain altitude.
Bishop’s project corrects for al
titude problems caused by the heat
ing and cooling of the balloon during
the day. In the morning the sun
heats the gas in the balloon, increas
ing pressure, and giving the balloon
more lift. He said with the present
system people on the ground
monitor instruments that indicate
internal pressure of the balloon,
venting gas when pressure increases
and dropping ballast when it de
creases to maintain the same al
titude.
Bishop said his system differs
from the present system in that he
uses temperature instead of pres
sure to maintain altitude.
Bishop said his system monitors
the balloon’s temperature and au
tomatically corrects the balloon’s al
titude by using a computer to calcu
late how much gas to vent or ballast
to drop. He said his system is better
than one in which a person ground
monitors pressure gauges. By the
time the person on the ground
notices the pressure change, the
balloon has already gained an up
ward or downward motion. Then he
would correct the change by venting
gas or dropping ballast to stop the
balloon as it drifts away from the de
sired altitude.
Bishop said his system would
overcome this time lag by making
corrections before the balloon gains
inertia. He said that with his re
finement the balloons used by re
searchers wouldn’t need to carry as
much ballast. Instead, they could
carry more equipment.
Bishop said he doesn’t develop
the hardware, but only creates the
computer program to design the bal
loon. Bishop uses computers to
simulate balloon flight and deter
mine how his system works. The
engineer said his project is not
finished, but he hopes to complete
it by next May.
RadM
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