Product Description
Hot Air Balloons Wrapped Canvas Prints
Hot Air Balloons Wrapped Canvas Prints
The hot air balloon is the first successful human carrying flight technology the simplest, often used by home builders, is a hemisphere on top of a truncated cone. More-sophisticated designs attempt to minimize the circumferential stress on the fabric, with different degrees of success depending on whether they take fabric weight and varying air density into account. This shape may be referred to as natural. Some specialized balloons are designed to minimize aerodynamic drag to improve flight performance in competitions. The hot air balloon is the first successful human-carrying flight technology. A hot air balloon consists of a bag called the envelope that is capable of containing heated air. Suspended beneath is a gondola or wicker basket, which carries passengers and a source of heat, in most cases an open flame. The heated air inside the envelope makes it buoyant since it has a lower density than the relatively cold air outside the envelope. As with all aircraft, hot air balloons cannot fly beyond the atmosphere. Unlike gas balloons, the envelope does not have to be sealed at the bottom since the air near the bottom of the envelope is at the same pressure as the air surrounding. For modern sport balloons, the envelope is generally made from nylon fabric and the inlet of the balloon is made from fire resistant material such as Nome. A hot air balloon for manned flight uses a single-layered, fabric gas bag with an opening at the bottom called the mouth or throat. Attached to the envelope is a basket, or gondola, for carrying the passengers. Mounted above the basket and centered in the mouth is the burner, which injects a flame into the envelope, heating the air and taking off. The heater or burner is fueled by propane, a liquefied gas stored in pressure vessels, similar to high pressure forklift cylinders. Besides special shapes, possibly for marketing purposes, there are several variations on the traditional.
