The former school building was built in 1960, made of concrete, and heated by propane fuel.

This gondola carries propane fuel and a double burner, the pilot and up to two passengers.

The net effect was to save propane fuel and extend the balloon's duration and range.

Most experienced plumbers seldom use propane fuel.

Similar plans for other buildings are in the works, and the town also has ended the use of propane fuel at its wastewater treatment plant.

This allows him to carry much more propane fuel for burners that heat air and provide supplementary lift at night, when the balloon loses buoyancy.

The balloonist used up propane fuel much faster than anticipated, and experts in his support group, including several long-distance balloonists, were unable to guess why.

All propane fuels include an odorant, almost always ethanethiol, so that people can easily smell the gas in case of a leak.

Commercially available "propane" fuel, or LPG, is not pure.

No Rozier balloon could fly that high because there would be insufficient oxygen to allow propane fuel to burn.