Managed to track down the font used for the ventral engineering hull, shuttlebay "fantail" and nacelles. United Sans Heavy from House Industries.
http://www.houseind.com/fonts/unitedcollection/fontspecimens
Not quite sure about the dorsal saucer markings, although it looks close to Eurostile Round Extended.
http://www.houseind.com/fonts/unitedcollection/fontspecimens
Not quite sure about the dorsal saucer markings, although it looks close to Eurostile Round Extended.