Where do you think engineers get their equations?

For the science part of it: >100 years old scientific literature

Possibly this was sarcasm, but I’ll bite just in case. There is quite a lot of scientific research that informs modern aerospace engineering: https://phys.org/tags/aerospace+engineering/

You’ll find similar physics research for example in nuclear power, optics, quantum computers, telecommunications, engines.. all kinds of engineering really. Chemistry is also quite relevant and there are new, stronger materials being engineered all the time based on research.

It’s definitely not all just 1900s physics driving everything, even if you say that for some reason anything researched then doesn’t fall under the 80% of science that doesn’t work (which GP didn’t).

Where do you think scientists get their data?

Much of what you think of as science came from engineers.

Is rocket science possible sans science? Can you be more specific what engineering without dependency on any science is? Like how do you even approach inventing gps as an engineer if 80% of physics calculations don’t actually work for example?

Almost all of what is called "rocket science" is firmly in the engineering wheelhouse.

GPS relies very little on 20th century science, beyond GR corrections.

The science behind orbital mechanics is just Newton's Laws, stuff thoroughly settled centuries ago.