Definition
A type of fabric closure used on the upper surface of a hot air balloon envelope. It consists of a circular panel of fabric held in place against the opening at the top of the envelope by the internal pressure of the heated air, and connected to the basket by a control line that the pilot pulls to deflate the envelope after landing or to vent hot air during flight.
Plain English
A round piece of fabric that sits over the hole at the top of a hot air balloon. Hot air pressure inside keeps it sealed against the opening, and the pilot pulls a rope to lift it open and let air out when needed.
Context Anchor
Seen in hot-air balloon systems, preflight checks, descent control, and landing procedures.
Derivation
Called a 'parachute' top because it works like a parachute canopy — a fabric disc held against an opening by air pressure, opening when pulled. The name describes the action, not the function of slowing a fall.
Why Pilots Care
The parachute top is the primary means of venting hot air and deflating the envelope after landing. A balloon pilot must understand how it seats, how it opens, and how it reseals during flight, because incorrect operation affects descent rate and ground handling.
Grounding Statement
Picture the balloon pilot pulling a line so a round panel at the top opens and hot air spills out, making the balloon descend.
Intuition Check
Do not read “parachute” here as a rescue parachute. In ballooning, a parachute top is a controllable vent panel built into the top of the balloon.
Example Sentence 1
After touchdown, the pilot pulled the deflation line to open the parachute top and collapse the envelope.
Example Sentence 2
During deployment the parachute top inflated first, allowing the canopy to fill evenly without oscillation.