hogi90 November 29, 2012 08:12 PM and we don't use sterling engines from whatever fuel source is what? if it is dependable enough to be in space where there is no mechanic then is sounds reliable enough for my backyard front-yard porch... Stephen N Russell November 29, 2012 10:22 PM can apply to Manned Space IE ISS or Lunar base?? JMOdom November 30, 2012 12:00 AM Sounds like a really good idea. (Kind of thinking somewhat out of the box.) Now you'll probably have some environmentalist raising a stink about "Nukes in Space". Fretting Freddy the Ferret pressing the Fret November 30, 2012 08:20 AM Pretty amazing how it's able to dump waste heat space into near vacuum. I wonder how the thing is going to look like for a 1-kilo watt power generator Douglas Thomas November 30, 2012 04:40 PM @hogi90 For earth based engines there are more effective and efficient options. Mainly Stirling engines end up being lower power and torque for there size.@Stephen Earth orbit and the moon are inside Mars orbit so Solar is a much better option. Also for manned operations the power budget would be much higher and need a larger more complex reactor. As an example the ISS solar arrays generate 84,000 Watts while the RTG on the Mars science Lab only generates 125 Watts. Dwight Divine November 30, 2012 09:25 PM @hogi90 @Douglas Also, we do use Stirling engines for some things. Here's a common use, for example:http://solar.calfinder.com/blog/products/stirling-engine-addresses-large-scale-solar-power-concerns/Wikipedia has a decent overview of some advantages and disadvantages of Stirling engines versus internal combustion engines:http://en.wikipedia.org/wiki/Stirling_engine#Analysis Kwazai November 30, 2012 10:26 PM I'd wonder if neutrino fired hydrogen peroxide would function similarly in deep space as it does miles underground. Buck Smith November 30, 2012 10:32 PM Sound cool. Forget about space, I want one at home. But dont heat pipes require gravity to function? Buck Smith November 30, 2012 10:36 PM Ok never mind my comment about gravity. The wikipedia tells me one can make a heat pipe with capillary force in place of gravity. So clever. Buck Smith November 30, 2012 10:46 PM The Feynman's lectures on physics level question is - In a capillary heat pump what energy source moves the lquid from cold side bacl to hot side?