In the 21st century.
Due to some industry barriers, whenever people mention engines, they often think of them in a grand and upscale way.
But in reality.
In some model aircraft circles, making your own aircraft engine is not a very rare thing, funding is positioned behind technology.
Take DIY turbojets for example.
A quick search on Bilibili will yield a lot of related videos, and some geek websites still have some data left.
The number of engines made at home by many amateur scientists can fill half a room.
Of course.
Some may ask why DIY engines are so prevalent?
This cannot be explained without mentioning a source of all evil:
Kurt Schreckling.
In early 1998.
This engineer-level enthusiast, after countless failures, finally got his first designed turbojet engine to successfully operate and it even proved effective in actual combat.
Thus.
