Building an "airborne
Mars Rover" - hopefully it'll be easier than a
Mars Rover stuck on the ground. We have black plastic
bin bags and sticky tape, so we tried sticking bits
together to make a giant cylinder and a giant sphere
It sounds so simple - the black plastic bodies will
absorb the heat from the sun like crazy, get hot and
rise. But the wind is a real issue; it always is in
ballooning. I live in Bristol, a Mecca for balloonists.
There's a world famous Balloon Festival there every
year, but balloons can only fly when the wind's not
too fierce. The wind whipped the cylindrical balloon
to shreds - it looked mad, lashing about all over the
place. So we focused on the spherical balloon, which
was calmer in the winds.
By the end of day one, we decided we'd build a sphere
- but it needed to be bigger.