is there a standard speed for unspecified missiles/rocket?

[Oliver_de_jesus]

^
Basically an unspecified military jet because there is no similar design in real life, it launches missiles/rocket to which the protagonist can react

is there a minimum speed that a missile needs to fly?

 

[Blahblah9755]

If it’s air-to-air, you have a rough idea of the time period and can guess the country it’s from, I think this could help: https://en.wikipedia.org/wiki/Air-to-air_missile#Typical_air-to-air_missiles
If it’s air-to-surface, it’ll probably take longer to look through since there’s no handy chart, but there’s a list for those as well: https://en.wikipedia.org/wiki/Air-to-surface_missile#List_of_air-to-surface_missiles

 

[Oliver_de_jesus]

It is never explained from which country the Jets belong, they are simply fighter jets from an independent organization of any country, although I think that it does not express me well, they are not nuclear missiles/rockets is something like Combat jets's regular weaponry

 

[DarkDragonMedeus]

Blahblah sounds correct.