Guessing by the fuzzy tutorial you posted, I think you are trying to rotate 1/4 of the blimp and one tail fin 3 times to complete the blimp. You can do this, no matter what version you are using, but it will be nessesaary to know your version to give you the right pathway.
In short: select both and choose rotate then the use an arrow key to lock a rotate direction. Start from the nose and rotate once either by inference or by typing 90 and hitting enter. Then type x3 and enter.
Even better make the two pieces a single component before rotating.
Tell us where this process goes wrong for you. If you ever come back