SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aero-balloon-climb-descend

Which action normally makes a hot-air balloon climb?

Firing the burner heats the air for a climb.

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  1. Opening the top vent
  2. Firing the burner ✔
  3. Cooling the envelope

Why: The propane burner heats air inside the envelope, increasing buoyancy. To descend, the pilot can let the air cool or release hot air through the top vent.

Huh, didn't know that: The vent at the top of the envelope is located in the crown.

The dad joke
The burner gave the balloon a warm welcome to the sky.
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References

Answer: Firing the burner. The propane burner heats air inside the envelope, increasing buoyancy. To descend, the pilot can let the air cool or release hot air through the top vent.

  1. Aerospace Dimensions Module 1: Introduction to Flight akwg.cap.gov/media/cms/Module_1__Intro_to_Flight_CE64D2DBD1245_e4d7f.pdf
    the heat source for filling the envelope with hot air
    Checked 2026-10-10.

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