Using a parent class as a paremeter to avoid writing code for all children classes

Question

I have a rocket class. There are two other classes that act as rocket types so they have extended from the rocket class. (class U1 and class U2)
There is a method called runSimulation that takes in a parameter. Can this method be written once and have it work with both the U1 class and U2 class.
Could by using the parent class Rocket help in solving this?