Showing posts with label how it work. Show all posts
Showing posts with label how it work. Show all posts

What You Need To Know from hot air ballooning

Ever since it was first invented, man has been fascinated by the hot air balloon. Today, hot air ballooning is an incredibly fun activity enjoyed by many people from all over the world. Its main attraction is in the tranquillity this means of transport provides, the view one gets from being up there, and of course that weightless feeling of floating above the world.

So how does this simple yet marvellous contraption work? The answer lies in the wind and the air. Since hot air balloons are subject to the movement of the wind, the air remains still in the basket, except for the times when the balloon is speeding up, climbing or descending. The balloon is able to stay afloat by the constant heating of the air in the balloon which causes it to rise.

Ballooning like any mode of transport has its risks and dangers. Landing is one of the trickiest parts of ballooning. Smooth landings can be hampered if the ground wind speed exceeds 5 miles per hour. Under certain circumstances the basket can even drag or tip over, but prior to the flight, passengers are taught about the safe landing procedures and what to do in case of an emergency. However, accidents do happen and passengers are advised quickly to stay away from the side that is going down. It is best advised to land near a line of trees or in a valley.

The major dangers with hot air ballooning is reaching excessive speeds when landing, colliding with another balloon in the air or hitting high voltage electricity lines. In fact, power lines pose the biggest threat and are the most common cause of major ballooning disasters. However, licensed balloon operators make it their business to know where power lines are and avoid them at all costs, even if they have to land on a road.

The earliest known hot air balloon flights were done in the Chinese Shu Kingdom when military leader, Zhuge Liang used them as signals for his military campaigns. The first recorded balloon that carried passengers was accomplished in France in 1783. Later, hot air balloons were used at the Battle of Fleurus by the Austrians in 1794, again for military purposes.

The modern balloons that we use today were designed by Ed Yost in 1960. The first flight occurred in October over Bruning, Nebraska. Today balloons are mainly used for tours and recreation. In fact, over seven thousand hot air balloons are in regular operation across the country.
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Launching and Landing

Most of the work in hot air ballooning comes at the beginning and the end of the flight, when the crew inflates and deflates the balloon. For the spectator, this is a much more spectacular show than the actual balloon flight.
Once the ground crew has found a good launching point, they attach the burner  system to the basket. Then they attach the balloon envelope and begin laying it out on the ground.

When the envelope is laid out, the crew using a powerful fan at the base of the envelope and begins to inflating it.

When the air is enough in the balloon, the crew starts to blast the burner flame into the envelope mouth. This will heats the air inside the envelope and building pressure until the balloon inflates all the way and starts to lift off the ground.

The ground crew members hold the basket down until the launch crew and the passengers is on board. The balloon basket is also attached to the ground the last minute, to keep balloon not to blown away before it is ready to launch. When everything is set, the ground crew releases the balloon and the pilot fires a steady flame from the burner. As the air heats up, the balloon lifts right off the ground.
This entire process only takes 10 or 15 minutes. The landing process combined with deflating and re-packing the balloon envelope, takes a while longer.
When the pilot is ready to land, he or she discusses possible landing sites with the ground crew (via an onboard radio). They need to find a wide open space, where there are no power lines and plenty of room to lay out the balloon. As soon as the balloon is in the air, the pilot is constantly looking for suitable landing sites, in case there is an emergency.
The balloon landing can be a little rough, but an experienced pilot will bump along the ground to stop the balloon gradually, minimizing the impact. If the ground crew has made it to the landing site, they will hold the basket down once it has landed. If the balloon isn't in a good position, the crew pulls it along the ground to a better spot.

The ground crew sets out a ground tarp, to protect the balloon from wear and tear. Then the pilot opens the parachute valve all the way, so the air can escape out the top of the balloon. The ground crew grabs a cord attached to the top of the balloon, and pulls the envelope over onto the tarp.
Once the balloon envelope is down on the ground, the crew begins pushing the air out. When the balloon is flattened, the crew packs it into a stuff sack. This whole process is a lot like packing up a giant sleeping bag.
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