Hot air balloons are categorized as aircraft. They have a bag, which is also called an envelope incorporated as one of the most important components. The design of the bad allows it to keep air when it is heated. As such, when in search of hot air balloons Colorado presents among the best locations to consider making a visit to.
A wicker basket is usually used in ordinary short-distance, low-altitude models. However, if the balloon is designed to travel over long distances at high altitudes, a capsule is used in the place of a wicker basket. The air inside the bag is in most cases heated using an open flame. When the air is heated, its density lowers that he cold air around it, making it buoyant.
It is impossible for the balloon to fly beyond the atmosphere like is the case with all kinds of aircraft. It is not necessary to seal the bottom of the envelop like it is done in gas balloons. The reason why the bottom is not sealed is because the gas at the bottom of the bag usually has the same atmospheric pressure as the air outside the balloon.
When the balloon is designed to carry people, it is made of a single-layer, fabric gas bag. A mouth or a throat refers to the opening at the base of the envelop through which air is heated. Heating of air is achieved using burners placed in the basket and heating the air below the opening of the envelop. Various kinds of fuel can be used to heat the air, including propane and liquefied gas.
Dacron and ripstop nylon are some of the materials used in making the envelop. During production of the envelop, the material is cut into smaller panels that are then sewn together to form the whole bag. Load tapes are also sewn together with the panels so that they can be used to hold the gondola. The names gores or gore sections are used to refer to the panels, which run from the crown of the bag to the bottom.
The number of gores in the envelop varies a lot, with some having only 4 panels while others having as many as 24 sections. There is usually a crown ring at the top of the envelop. The ring is usually made of aluminum in most cases, but other metals may also be used. Load tapes attach to the ring at the top. Load tapes are sewn into loops at the bottom to attach to the basket.
A method called French fell, double lap seam, or French felled is used for sewing panels of the envelop together. In this method, fabrics are folded over one another at their edges, with the load tape included and then sewn using two rows of paralleled stitching. Other methods that may also be used instead of French fell are zigzag and flat lap.
To make the envelop air- and water-tight, a coat is applied over it. Silicone and polyurethane are the two most commonly used coats today. The effective life of the envelop is reduced or exhausted by the degradation and weakening of the coat applied on the envelop. Common causes of degradation of the coat include mechanical wear and tear, heat, and moisture.
A wicker basket is usually used in ordinary short-distance, low-altitude models. However, if the balloon is designed to travel over long distances at high altitudes, a capsule is used in the place of a wicker basket. The air inside the bag is in most cases heated using an open flame. When the air is heated, its density lowers that he cold air around it, making it buoyant.
It is impossible for the balloon to fly beyond the atmosphere like is the case with all kinds of aircraft. It is not necessary to seal the bottom of the envelop like it is done in gas balloons. The reason why the bottom is not sealed is because the gas at the bottom of the bag usually has the same atmospheric pressure as the air outside the balloon.
When the balloon is designed to carry people, it is made of a single-layer, fabric gas bag. A mouth or a throat refers to the opening at the base of the envelop through which air is heated. Heating of air is achieved using burners placed in the basket and heating the air below the opening of the envelop. Various kinds of fuel can be used to heat the air, including propane and liquefied gas.
Dacron and ripstop nylon are some of the materials used in making the envelop. During production of the envelop, the material is cut into smaller panels that are then sewn together to form the whole bag. Load tapes are also sewn together with the panels so that they can be used to hold the gondola. The names gores or gore sections are used to refer to the panels, which run from the crown of the bag to the bottom.
The number of gores in the envelop varies a lot, with some having only 4 panels while others having as many as 24 sections. There is usually a crown ring at the top of the envelop. The ring is usually made of aluminum in most cases, but other metals may also be used. Load tapes attach to the ring at the top. Load tapes are sewn into loops at the bottom to attach to the basket.
A method called French fell, double lap seam, or French felled is used for sewing panels of the envelop together. In this method, fabrics are folded over one another at their edges, with the load tape included and then sewn using two rows of paralleled stitching. Other methods that may also be used instead of French fell are zigzag and flat lap.
To make the envelop air- and water-tight, a coat is applied over it. Silicone and polyurethane are the two most commonly used coats today. The effective life of the envelop is reduced or exhausted by the degradation and weakening of the coat applied on the envelop. Common causes of degradation of the coat include mechanical wear and tear, heat, and moisture.
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