- published: 23 Jan 2015
- views: 34
The hot air balloon is the first successful human-carrying flight technology. The first untethered manned hot air balloon flight was performed by Jean-François Pilâtre de Rozier and François Laurent d'Arlandes on November 21, 1783, in Paris, France, in a balloon created by the Montgolfier brothers. The first hot-air balloon flown in the United States was launched from the Walnut Street Jail in Philadelphia on January 9, 1793 by the French aeronaut Jean Pierre Blanchard. Hot air balloons that can be propelled through the air rather than simply drifting with the wind are known as thermal airships.
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 (in some long-distance or high-altitude balloons, a capsule), which carries passengers and (usually) 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 (closest to the burner flame) is made from fire resistant material such as Nomex. Beginning during the mid-1970s, balloon envelopes have been made in all kinds of shapes, such as rocket ships and the shapes of various commercial products, though the traditional shape remains popular for most non-commercial, and many commercial, applications.
We wrote a prelude
To our own fairy tale
And bought a parachute
At a church rummage sale
And with a mean sewing machine
And miles of thread
We sewed the day above L.A.
In navy and red
We wound a race track
Through your mom's kitchen chairs
And fought the shadows back
Down your dark basement stairs
I lit a match, then let it catch
To light up the room
And then you yelled as we beheld
An old maroon hot air balloon
I'll be out of my mind
And you'll be out of ideas
Pretty soon
So let's spend
The afternoon in a cold hot air balloon
Leave your jacket behind
Lean out and touch the treetops over town
I can't wait
To kiss the ground
Wherever we touch back down
La la la laa laaaa
La la la la
La la laa laaaa
We drank the Great Lakes
Like cold lemonade
And both got stomach aches
Sprawled out in the shade
So bored to death you held your breath
And I tried not to yawn
You made my frown turn upside down
And now my worries are gone
I'll be out of my mind
And you'll be out of ideas
Pretty soon
So let's spend
The afternoon in a cold hot air balloon
Leave your jacket behind
Lean out and touch the treetops over town
I can't wait
To kiss the ground
Wherever we touch back down
I'll be out of my mind
And you'll be out of ideas
Pretty soon
So let's spend
The afternoon in a cold hot air balloon
Leave your jacket behind
Lean out and touch the treetops over town
I can't wait
To kiss the ground