Hi Epic,
I have attempted to come up with a realistic list of ship classes to make up the 150ish ship increase for each house from 2765 to 2786.
Ive looked through the various TROs and sourcebooks and come up with some notes (various spreadsheets & documents) - still a work in progress.
The numbers of these classes could be anyones guess really, but anything larger than a Destroyer would be rare (perhaps with the exception of the Lyrans).
My thoughts/notes for the fleet expansion are as follows:
1/ Each house would likely have a sizable mothball fleet composed mostly of ex Terran Hegemony or Star League discards.
2/ Each House did pre war production - probably a few specific classes
3/ Civil War salvage or heavily damaged ships sold pre exodus
4/ Purchased Production from Terran Hegemony yards - surely they didn’t sit idle after Terra was retaken, or after the exodus.
Ex old Terran Hegemony Classes that were active 2765 or in mothballs are:
Aegis-2372 (Cruiser) : 30 were sold/given to houses before they were upgraded - each house seems to have kept these - probably 6 each - most of these seemed to be extant in 2765 (if not active I'd suggest in mothballs)
Baron (Destroyer): Half the 2582 SLDF numbers of these were sold to houses; when decomissioned in SLDF fleet in 2720 these were sold.
Black Lion I (Battle Cruiser): a few survived to the start of the 1SW (Capellans have 1 listed)
Bonaventure (Corvette): I believe some DC examples were destroyed at Hesperus by Invincible in 2SW
Carson (Destroyer): Withdrawn by SLDF in 2722; but these were likely sold off (they do appear in 2765 lists)
Cruiser (Cruiser): Mothballed 2405 but several sold to houses - DC has some in 2765
Essex I (Destroyer): Decommissioned 2645 and sold to houses.
Lola I (Destroyer): Seems to be have sold to houses; Capellans have some in 2765
Vigilant (Corvette): Replaced in TH in 2400 (mothballed or sold to houses) - despite age they definitely served in 1 & 2 SW
Each house probably had a few of their unique designs in mothballs:
For example Capellans maybe some Du Shi Wang (less than 12 left at start of 1SW); Federated Suns is mentioned as having some Davion I's in mothballs there could perhaps be maybe 1 Defender were in mothballs in 2765
Possible House Production:
Capellan Confederation Production was Essex I and Vincent Mk 39, and probably Carrack
Draconis Combine production was Narukami II, and probably Samarkand II and Carrack, and possibly Vincent Mk 39
Federated Suns production was probably Davion II, Robinson II, Carrack and maybe some Vincent Mk 39
Free Worlds League Production was League II and probably Carrack (Carrier and Transport) and maybe Vincent Mk 39
Lyran Commonwealth production was Tharkad, Commonwealth II and Mako, and probably the Carrack
My thoughts on the universality of the Vincent's and Carrack's is that they seem to be commonly mentioned in the 1SW book, however given that the Capellans borrowing the Vincent design specs was regarded as being naughty maybe these Vincents were just Terran Hegemony yards purchases.
With Terran yard production or civil war salvage you could probably grab almost any class of ship - but most likely only the smaller classes would be in any numbers (Essex or Vincent); anything larger than a Destroyer would be very rare.
A Sovetskii Soyuz is mentioned in the Draconis Fleet in the 1SW book; The Capellans had a Congress in 1SW book too, plus there is the Potemkin used by the Lyrans in their attack on Luthien.
Plus the Soyal class; produced by Delhi Shipyards (Carver?) was purchased by the FWL and CC (mentioned in 1SW book for both)
I hope this is useful.