What is a solar balloon?

A solar balloon is a balloon that gains buoyancy when the air inside is heated by solar radiation, usually with the help of black or dark balloon material. The heated air inside the solar balloon expands and has lower density than the surrounding air. As such, a solar balloon is similar to a hot air balloon.

Who invented solar balloons?

The US Tracy Barnes pioneer made several solar flights under tetrahedral single-skin solar balloons, one of which he named ‘Barnes Solar Firefly Tetrahedron’. Barnes first piloted a fully-solar-powered balloon flight on 1st May 1973, followed by Jim Woodman with the Condor I and Fredrick Eshoo with the Sunstat soon after.

Can solar-powered balloons be used for sustainability?

Operating individually or as an aerial observation network, the solar-powered balloons can be deployed in under an hour, can fly to 30 days at a time, are capable of withstanding winds of 43 mph (70 kph), and can fly at great altitudes. The EONEF balloons can be used for a wide range of sustainability initiatives.

How do Solar balloons work?

This concept is also adopted by hybrid balloons which use helium and heated air, with strong solar elements included in the construction to extend duration and contribute to a more efficient flight. On a solar balloon, to aid the heating of the air inside, a dark coloured skin is used, as in the Aerocene Pacha design.

Could solar-powered balloons help explore other planets?

" [In the stratosphere,] there are mysterious infrasound signals that occur a few times per hour on some flights, but the source of these is completely unknown," said Bowman. Solar-powered balloons could also help explore other planets, such as observing Venus' seismic and volcanic activity through its thick atmosphere.

When was the first pure solar balloon made?

The first human-carrying pure solar balloon flight was made on 1 May 1973 by Tracy Barnes in his balloon 'Barnes Solar Firefly Tetrahedron'. This balloon was made from a spiral tube of fabric that was formed into a tetrahedron. Dominic Michaelis is recorded as having owned the first pure solar balloon in Europe.