You can make hot air balloons using steam rather than… er… hot air. Here’s a link. Amazing.
(from a discussion started on a mailing list this morning by Bryson Gore)
Jonathan Sanderson’s weblog, since 2001.
You can make hot air balloons using steam rather than… er… hot air. Here’s a link. Amazing.
(from a discussion started on a mailing list this morning by Bryson Gore)