This task asks us to make a machine or tool that can transfer energy.

 

Idea 1: Gun with short-stroke gas piston (Gun is also considered an energy conversion device.)

However, the Chinese standard of identifying a “real gun” is if the muzzle has a kinetic energy of more than 1.8 J/cm2, and if you want to make a short-stroke piston, it needs too much more kinetic energy than this, so it is not possible.

Not possible: Breaking the law…

 

Idea 2: Flying machines, such as biplanes or helicopters (scaled down)

It is possible but super hard: it requires 3D Modeling(fusion, etc.), 3D printing(Ultimaker Cura), Programming(Java/C++), Designing(Blender, etc.), Circuit Design, and a lot more. The money to buy materials may be several thousand RMB.

Possible: Highly difficult

 

Idea 3: REAL Rocket (2-stage rocket or 1-stage rocket)

Possibly, But if you want to play for real, you need propellant and an engine, and these civilians can hardly buy. But there are other ways to consider.

Possible: Most Difficult

 

Idea 4: Water Rocket

It is considerable. There are no items you can’t buy, nothing illegal, and it’s safe. All that is needed is water, a container, and some 3D-printed parts.

Possible: Not hard

 

Final Idea: Helicopter (In idea Flying Machines)

Alex and Gavin also want to make a helicopter. It’s hard, but we are willing to try. We grouped up.