Solar Baloon

On a lighter than air and playful note, Dominic Michaelis became interested in solar balloons and solar domes.
(http://perso.wanadoo.fr/ballonsolaire/historique2.htm)

He asked Julian Nott, an experienced balloon pilot, to undertake the first solar balloon crossing of the Channel. This was carried out on 21 August 1981, with no gas being burnt during the crossing.

SOLAR BALLOON CROSS CHANNEL FLIGHT 21 08 1981