SIGMET
Significant Meteorological
Information.
Small Aircraft
Aircraft having a maximum
certificated takeoff weight of 12,500 pounds or
less. All currently type-certificated balloons are
small aircraft.
S/N (Serial Number)
A number, usually one
of a series, assigned for identification. |
Step Descent
A method of allowing a balloon
to lower toward the ground by reducing the
altitude, leveling-off, and repeating the step, to lower the balloon in increments rather than one
continuous motion.
Superheat
A gas balloon term, superheat
occurs when the sun heats the gas inside the
envelope to a temperature exceeding that of the
ambient air, resulting in expansion of the gas. |
Superpressure Balloon
(1) A type of hot air
balloon which has no openings to the
atmosphere the mouth is sealed with a special
skirt and is kept pumped full of air (at a higher
pressure than the atmosphere) by an on-board fan.
Used on moored balloons to allow operations in
relatively strong wind. (2) In gas ballooning a
sealed envelope in which the internal envelope
pressure exceeds that of a non-sealed envelope.
Suspension Lines
Lines descending from the
mouth of a balloon envelope from which the
basket and heater are suspended.
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