As a side note, the Intrepid
contrast gives us a nice place to examine the relative usefulness of nacelle as part of hull volume.
Specifically of the 210,000 m³ of volume available to a Constitution
approximately 25% or 54,000 m³ is dedicated to warp nacelles. (The number is similar for the refit)
For the 625,000 m³ Intrepid
the ratio is much smaller. 17,000 m³ per nacelle, or 34,000 m³ total which is 5.5% of total volume.
We do know that Voyager
when landing seems to be much more "back" heavy in that the nacelles are capable of counteracting the weight of the primary hull. The density of the rear half of the ship then becomes at least 50%, and given the relative volume of the hulls, most of the extra mass is probably in the nacelles.
If we assume uniform distribution of mass on the Constitution
and something of a 15% mass of Voyager
in her nacelles, (leaving something like a 50/35 split for her primary hull/secondary hull) we have comparative nacelle masses of:
- 212,500 tons
- 105,000 tons
So per ton of nacelle...
- 4 total tons/ton of nacelle
- 6.67 total tons/ton of nacelle
And...(Rounded to the nearest cubic meter)
- 1 m³/ton of nacelle
- 6 m³/ton of nacelle
And finally on a volume basis(Rounded to the nearest cubic meter):
- 3 payload volume m³/m³ of nacelle
- 17 payload volume m³/m³ of nacelle