The 'crown line' is a rope attached at the top of the balloon and is used to stabalize the balloon during inflation and as an aid in deflation. Envelopes are made in a variety of sizes, ranging from 56,000 cubic feet up to 210,000 cubic feet. Smaller balloons are frequently used in sport competition because of their quicker response time whereas larger balloons are generally used for carrying passengers because of their heavy lift capability. It takes 1,000 cubic feet of hot air to lift around 18 to 20 pounds. That's the volume of a 10 foot x 10 foot room with a 10 foot ceiling.
Propane is the fuel used in hot air ballooning.
The fuel is under substantial pressure inside the fuel tanks, and when released through the fuel lines to the burner, vapourizes even more and expands tremendously. The basket is where the pilot, the passengers and, of course, the fuel are carried during the flight. The preferred choice of material for construction is wicker. Suspension ropes built into the basket are used to attach the envelope's suspension cables and the 'uprights' provide a place to mount the burner. Baskets are made in a variety of shapes and sizes, some rectangular, some triangular and can be made large enough to carry 10 or more people.