Hi author, where did the aircraft and engine data come from?

That data looks to be rather arbitrary. Real aircraft performance is hugely dependent on aircraft weight, altitude, and ambient (air) temperature. And engine performance is very dependent on air temperature and airspeed. So your table of cruise/climb speeds etc might produce interesting results but the results are not going to be at all realistic.

To give you an idea of data complexity, all airliners come with hundreds or thousands of pages of closely printed tables giving performance at specified weight, temperature, altitude, etc.