It says that each level of Combustion your ships move 10% faster, and 20% for each level of impulse. Is this just the ships that use each tech, or is it for each ship?

Clarification, if i have a light fighter, it uses combustion engine... so if i upgrade my impulse tech does the light fighter move faster too? or just impulse engine ships (Heavy Fighter)?

Engine techs are specific to each type of spacecraft. Increasing one type will not affect another.

Also, remember that engine tech percentage increases are applied to the base performance and not overall performance increases. Extremely high levels of engine techs yield almost no increase in speed.

Small Transport Ship: The first ship built by any emperor, the small cargo is an agile resource moving ship that has a cargo capacity of 5,000 resource units. This multi-use ship not only has the ability to quickly transport resources between your colonies, but also accompanies larger fleets on raiding missions on enemy targets. [Ship refitted with Impulse Drives once reached level 5]

What has the reach level 5? the impulse drives?

Correct.

-Istalris-

Thanks