What can one create with
recycled straws, tape, candles and a ginormous plastic bag? A hot air balloon
of course! Once again, the class begins to work and construct a structure that
is made solely of ordinary materials at home. This time, it is required that we
make a hot air balloon rise 5 cm for 20 seconds (or 0.20s). Was it really
possible?
Our Basic Idea
The idea behind our hot air
balloon was to make sure that no heat escaped from the balloon except from the
hole at the bottom the base (which was purposely cut there). We hoped that if
there was a lot of heat trapped in the inside the balloon would rise for sure. We used the top part of the structure from Egg Lander attempt 2 and carried out our plan.
Results
10 seconds after lighting
the candles, it was apparent that our hot air balloon was not going to work.
For one, the bag was beginning to melt! We did not even think that maybe the
bag would be too close (and small) and the flames from the candle would have a
drastically negative effect on the structure. Also, we used a lot of tape and
cardboard paper. This added unnecessary weight and this was also another factor
as to why the balloon did not work.
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