Figure 56: Hot Air Balloon Performance Graph

Gross Weight (pounds) Air temperature 600 800 1000 1200 1400 1600 1800 +120 +100 +80 +60 +40 +20 0 −20 −40 °C +50 +40 +30 +20 +10 0 −10 −20 −30 −40 Sample: computed maximum Envelope temperature 300 °F Gross weight 1,663 lb Typical free lift 150 lb Ambient temperature 60 °F Basket weight 130 lb Envelope weight 152 lb Empty tanks 78 lb Fuel 126 lb Passenger weight 720 lb Total weight 1,206 lb At “gross weight” find 1,206 lb proceed vertical to intersect 60 °F horizontal line. Maximum height with 1,206 total weight would be 11,000 feet MSL. Max gross weight Free lift only 11,000 12,000 13,000 14,000 15,000 feet 10,000 feet 5,000 feet Sea level °F