Today's systems, such as planes or engines, are so complex that the only way to achieve today's level of efficiency is to use numerical simulations, aka Computer aided designs. Google excels at organizing information, processing big data and getting answers with predictive models, they do it better than anyone else and it can be potentially applied to just about any field.
I haven't seen any evidence that Google is better at computational fluid dynamics than the large aerospace companies. This is just silly fanboyism with no basis in reality.
