 When Frederick opened a beer garden and bowling alley, he first built a railroad up the mountainside and had mules turning a pulley system at the top, which moved the railroad cars up the mountain, carrying tourists.But that was not sustainable, so he invented a type of cigar-shaped balloon/blimp to be filled with hydrogen and which was made of fabric pieces sewn by Margaret, his wife, by hand.Paddle wheels were on the sides and it had two cranks for propulsion windlass.