why can I build only corvettes?

[zijabox]

I have a space station on level 2, but I can still build only corvettes, while other empires have long ago destroyers.
but there is one more thing I noticed in the federation I can build destroyers (like federation ships) but in the proposal I can not choose them.
Can you help ?

[Twitching Finger]

Have you researched new ship models ?

[Seaghauwn]

you probably haven't done your research

[tempest.of.emptiness]

When you run into a gap in your research like this, I would suggest researching the cheapest option available to you until the one you want becomes available. Choosing the cheapest option means that you will get another choice sooner (than if you chose a more expensive tech to research), and also means that you will get more choices per unit research - thus minimizing the time necessary to find the tech you really want.

Obviously, this only applies within the field that holds the tech you are looking for, which in this case is engineering. Choosing cheap sociology techs won't help you find an engineering tech faster.

Also, it may help to hire and assign a scientist to be in charge of your research in the appropriate field that has a specialization in the type of tech you are looking for. For example, you are looking for Destroyers, which is a Voidcraft tech, so assigning a leader with a Voidcraft specialization to be in charge of your engineering research will tend to reduce the time necessary to find the Destroyers tech.

[zijabox]

thank you for the answers, I probably haven't explored a destroyer yet