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Home > Exam Questions > BPL Gas Balloon Pilot Licence > Principles of Flight (Balloon) > A fully inflated gas balloon is in level equilibrium. Its mass is reduced by 1% and it rises to a new equilibrium while releasing gas. In a simplified model where a 1% pressure decrease corresponds to 80 m of height, what is the approximate change in equilibrium altitude?

403 - EASA BPL Gas Balloon Theory in English - A fully inflated gas balloon is in level equilibrium. Its mass is reduced by 1% and it rises to a new equilibrium while releasing gas. In a simplified model where a 1% pressure decrease corresponds to 80 m of height, what is the approximate change in equilibrium altitude?

Question 403 - Principles of Flight (Balloon) - BPL Gas Balloon Pilot Licence

Equilibrium altitude increases by 800 m

Equilibrium altitude decreases by 800 m

Equilibrium altitude decreases by 80 m

Equilibrium altitude increases by 80 m

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