build, and test a structure made of balsa wood and glue that will balance and support weights. The team is allowed to use materials other than balsa wood and glue to assemble the parts of the ...

For the turbine and tail vane: 1 piece of 2mm thick balsa 10 cm by ... 19mm wide superglue large gear (about 60 mm diameter, Opitec part 840088) a piece of scrap wood, 3 cm thick and about 6 ...

Now, a team led by Ingo Burgert at ETH Zurich, Switzerland, has discovered how to tweak the internal structure of balsa wood to make the piezoelectric output 55 times higher. The solution was to ...