I have a confirmation from IHMC; its Internal Combustion powered hydraulic... believed to be 2 stroke; my friend works with Littledog mostly, hence
not sure 2 or 4 stoke on Bigdog. Littledog is electronic with electric motors; less robust.
It is my intuition that the end goal is to power these types of robots using micro mechanical amplification devices that harness the thermal expansion
of nuclear decay to drive the three control gyroscopes, electronics, and a larger composite flywheel which then compresses air for an on-demand
pneumatic artificial muscle (PAMs) system.
google keywords: mems, nuclear battery, radioisotope battery, nano-nuclear, etc.
also google: pnuematic artificial muscle
Weighing in at 2.73 grammes and capable of lifting 1kg means this little air muscle is capable of lifting over 360 times its own weight.
www.stop4stuff.com...
Coupling the energy of a radiation event to the scale of the micro electromechanical systems (MEMS) device provides very efficient power
generation.
US Semi Conductor
www.us-semi.com...
Sri Oracle
[edit on 6-4-2008 by Sri Oracle]