Something not yet right.

Mon, 20 Jun 2011 11:18:06 +0100

Once they were there, now they are not. Just a black screen. Testing, testing...

Paraglider Drops - Bethlehem Hot Air Balloon Festival 2011

Sat, 11 Jun 2011 23:16:41 +0100

Flying101 EUHABC flying instructions.

Sat, 11 Jun 2011 16:45:59 +0100

http://www.balloonclub.org/index.php?s=flying101

Here is a link to the excellent introduction to Hot Air Ballooning by the Edinburgh Univerity Hot Air Balloon Club.........

Flying101: How Hot Air Ballooning Works

Principles Of Balloon Flight

Balloons work on the very simple principle that hot air rises, as it is less dense than cold air. A balloon has a set of burners to heat the air, which is then trapped by the fabric of the envelope. As the air is heated, the lifting force eventually overcomes the force of gravity and causes the balloon to rise. The balloon will not rise forever though since the air in the envelope will cool and the balloon start to fall. As the balloon rises the air pressure also decreases. This means that there is less cool air to support the balloon so it will begin to drop again. By varying the temperature of the air in the envelope the balloon’s altitude can be controlled.

kalahari-ballooning

Something not yet right.

Paraglider Drops - Bethlehem Hot Air Balloon Festival 2011

Flying101 EUHABC flying instructions.

Flying101: How Hot Air Ballooning Works

Principles Of Balloon Flight