Original length: 116m (Assumption, could be any other size)
Scale: 1/2500
Print orientation for Detail Plastic: Top up
Mounting hole: Attack Wing, small
This is my take on the Romulan Bird-of-Prey from the book "Star Trek Spaceflight Chronology". For the size i found some more detailed pictures of the original model build by Doug Drexler for Mike Okudas "Spaceflight Chronology". Regarding the visible window rows there are abut 8 to 10 decks in the front hull. Using an average deck height of 3m for 9 decks on my 3D model, im ending up with a length of 116m for it.
I think this fits well to the time just prior to "Enterprise". The common assumption of the Romulans don't having warp drive up until TOS is stupid. They clearly have warp drive during "Enterprise" and the Bird-of-Prey from "TOS: Ballance of Terror" also clearly has warp nacelles. The line from Scotty everybody takes as proof they don't have warp just means, they currently are just running on impulse and don't have the power source to go to warp. I personally have the theory, the Romulans to this point do have warp engines, but they don't have enough dilithium like the Federation and the other fractions to produce enough antimatter and control the matter-antimatter reaction on their ships. I like to think they use old school fusion reactors to generate energy and store it in large batteries on their ships. So they are just able to do short warp-trips until they need to stop and recharge the batteries. This explains why the ship from TOS couldn't go to warp. They used all the energy for the cloak. Later during TNG, they developed a quantum singularity energy source to avoid the shortage of dilithium. The ship above also fits nicely to this theory. It looks like it has a huge reactor housing at its aft end, while the ribbing on the underside might be to cool the batteries. Only the front of the ship from the wings forward is inhabitable. The whole back is for power generation and storage. There is also a DS9 Comic in which the crew of the station found the remaining of one of these ships in the wormhole. It had tested the new quantum singularity drive, which went fatally wrong for the ship and its crew. It made sense they used an old space frame to test this new energy source and this ships might have provided enough internal space for the new equipment with the fusion reactor and the batteries removed.
If you need this in another material, size, or quantity, send me a message. I will try to make it as you need. Be sure to read
my comments below my shop page first.