[ck2]

Irony of it being all electric motors/actuators but needing a gas engine to power it so it is very loud.

[gene-h]

If it is like the original big dog then it doesn't use electric motors/actuators it uses hydraulics that are driven by the gas engine.[0] Supposedly it gets ~0.5 miles per gallon.

[0] http://www.bostondynamics.com/img/BigDog_Overview.pdf