A person, who calls himself the "Backyard Scientist," attempts to build a rocket engine using a YouTube video of a Russian-made rocket-powered sandblaster as a guide. He starts by building a small rocket engine and testing it, which produces a significant amount of thrust. However, the engine uses a lot of air, and the compressor can't keep up, so he decides to build a bigger rocket engine and purchase a more powerful air compressor.
He tests the new engine using propane and later switches to kerosene, which produces a brighter and more stable flame. He then uses the rocket engine to test various objects, including a steak, a hot dog, a coconut, a watermelon, a cabbage, an apple, and a can of sparkling water. The rocket engine is able to cut through or destroy all of these objects with ease.
The person also mentions that he has developed new t-shirt designs, which are available on his website, and asks people to stop sending him memes, as his inbox has been overwhelmed.
Here are the key facts extracted from the text:
1. The speaker visited SpaceX and took a tour, where they hatched a plan to build a rocket.
2. The speaker was not allowed to take pictures inside the SpaceX facility.
3. They analyzed videos on YouTube to learn how to make a rocket.
4. The speaker found a video of a Russian guy who made a rocket-powered sandblaster.
5. They decided to make a rocket engine similar to the one in the video.
6. The speaker made a rocket engine with three tubes nested together, with air entering the outer tube and fuel injected into the combustion chamber.
7. The nozzle of the rocket engine is important in turning high-pressure gas into high-speed gas.
8. The speaker made three different-sized nozzles to test which one works best.
9. The first test of the rocket engine was successful, but it used a lot of air and drained the tank quickly.
10. The speaker decided to make a bigger rocket and use a diesel-powered air compressor.
11. The new rocket was twice the size of the first one and needed more fuel.
12. The speaker used a hydraulic pump to pump fuel into the rocket.
13. The rocket engine was tested with different materials, including a steak, a hot dog, a coconut, a watermelon, a cabbage, an apple, and a can of sparkling water.
14. The rocket engine was able to cut through a piece of aluminum like a plasma cutter.
15. The speaker tested a can of shaving cream with the rocket engine, focusing the exhaust on the top of the can.
16. The speaker tested a whole coconut with the rocket engine, creating sparks and embers.
17. The speaker has developed new t-shirt designs and made them available on their website.
18. The speaker is working on developing a backyard space program.