[schiffern]

>A six degree of freedom inertial unit was $125,000 in 1970 and resolved differences of .1G. A 9 degree of freedom unit from Sparkfun Electronics [1] is now $125, and reliably resolves 1/4096'th of a G.

And the 1970s one weighed a lot more than 3.52 oz!

http://i.imgur.com/nrm2fUb.jpg

[Gravityloss]

That's still peanuts in rocket money and scale.

All these things could have been done earlier if the politics was different.

DC-X used F-15 gyros / guidance with some software tweaks for example.

[ChuckMcM]

So true, so true.