What is the purpose of opening the deflation port during a rapid landing?

• A. To rapidly deflate the envelope
• B. To vent unburned propane
• C. To increase lift for a smoother touchdown
• D. To alert ground crew with a signal

Answer: (A)

Opening the deflation port lets the hot air inside the envelope escape quickly. As the air vents out, the balloon loses lift, causing the basket to descend more rapidly and with better controllability. In a rapid landing, this quick deflation helps you reduce drift and settle onto the ground more predictably, minimizing the chance of a hard or unsatisfactory touchdown. It isn’t about venting propane, it doesn’t increase lift, and it isn’t a signal to ground crew—the port’s purpose is to shed air rapidly to enable a safe, controlled landing. After touchdown, the remaining air continues to vent to finish deflating the envelope.