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7) speed of the balloon --------------------------------------------- 16 feet per second Direct lateral resistance of the atmosphere ---------------------- 128 lbs. Necessary horse power of Gas Engine to overcome this resistance -- 7 Gas-engine. 4 cylinders Diameter of cylinder --------------------------------------------- 12" length of stroke ------------------------------------------------- 6" Revolutions per Minute ------------------------------------------- 100 Horse Power ------------------------------------------------------ 7 Gas, used by the Engine during 12 hours -------------------------- 746 C. feet Cooling apparatus Total surface of pipes ------------------------------------------- 335 sq. feet Vertical propellers Diameter --------------------------------------------------------- 10.8 feet Surface of both propellers --------------------------------------- 132 sq. feet Revolutions per Minute ------------------------------------------- 252 Produced pressure against the atmosphere by both propellors ------ 128 Lbs Horizontal Propellor Diameter --------------------------------------------------------- 6 feet Number of Revolutions -------------------------------------------- 240 Surface ---------------------------------------------------------- 28.4 sq. f. Produced pressure against the atmosphere ------------------------- 24 Lbs Weights Balloon structure, wooden frame & two rudders -------------------- 468 Lbs gas engine complete ---------------------------------------------- 1484 Lbs cooling apparatus ------------------------------------------------ 133 Lbs 2 vertical propellors -------------------------------------------- 192 Lbs 1 horizontal propellor ------------------------------------------- 53 Lbs