I'm sure I'm missing something, but is 2 per yard per turn just warships, or also jumpships?
Also, is the technology cost 10m + 10% of the entire states budget or 10m + 10% of the states technology budget?
2 per yard per turn for warship (compact core) ships.
5 (I think) for custom jumpships (I dont expect this to get used much)
Generic Unit Jumpships are built in civilian yards, and do not require the navies yardspace.
You may research 1 new tech per category per turn, maximum, and it must be one of the first three unresearched techs in that category.
Each tech researched costs a flat 10B, with the reduction for other powers that already have it, as well as an additional 10% of the Naval Budget. Thus the TH with its 750B budget will pay 85B to bring a new technology to use in its navy, and the typical house with a 300B budget will pay 40B
This 10% is best thought of as all the -other- work necessary to get a new technology from ‘we can build one in the lab’ to ‘this is in mass production, installed on ships, can be maintained, and weve worked out doctrine to use it successfully’. The reason its a % is because larger navies need to do these things for larger numbers of ships and yards and personell, and to keep larger powers from running away with a tech advantage.
My anticipation is that people will tend to buy 1 per turn, more or less, which puts us to about 2750 tech by about 2750 - but nothing keeps a nation from overheating its RnD budget and buying 3 a turn - this would make for a smaller, but after a few turns, very high tech, fleet.
A note on maintenance - and I may need to clarify this on the spreadsheet - paying listed maintenance is the default for normal performance. You can overpay to represent improved readiness, training, skill, and maintenance - though past an additional 1.1 or 1.2 multiplier, your looking at diminishing returns. Similarly, you can cut budget, but less than .8 it goes from ‘some problems’ to ‘massive problems’. At 0%, a ship is laid up in mothballs, against future need, but not crewed and wont be useable until it starts getting paid for again (next turn, unless you say you want to call them up in emergencies on a rush basis, and set aside money or note a willingness to go into debt to make it so)
Debt: You can spend over your budget. This debt, like any excess, carries over from turn to turn. Debt will accurue interest. (Credit does not! Beware too large reserves - beyond a certain point the government may decide if you dont need to spend it, they dont need to give it to you... this is also very appropriate to real world budgeting. ;)