Achei o datasheet do bixo...
http://www.bostondynamics.com/img/SandF ... 20v1_0.pdfResumão:
"SandFlea is a small robot with remarkable
mobility. The 11 lb robot drives like a
traditional wheeled vehicle on mild terrain,
but jumps up to 8m high over difficult terrain.
It can jump 25 times using the piston
actuator and onboard fuel supply. Jumps of
1-8 m heights are user selectable. Specially
designed wheels cushion the shock of
landing. Flight and landing attitude of the
robot are automatically controlled by an
onboard stability system"
Ele usa um pistão. Deve ter duas câmaras, dai comprime o líquido em uma e libera pra outra que deve atuar em um pistão, fazendo uma espécie de "estilingue"...
Bem bacana, tecnologia fudid4!!!