Do it yourself CLOSED SYSTEM PROPULSION APPARATUS (not iner

there would be no friction in space, so it woudn't work. Your design only works as when the fan retreats, its acceleration and force are not strong enough to make the railing move. replace the railings with empty space, and the whole thing becomes pointless. You can do this experiment by turning around on one leg using the power of the other. Now if you're standing in oil and butter instead of a shoe with good grip, you'll find it a lot more difficult to turn. I know I tried it as a kid :D

Same case. A 'closed system' will not be able to produce a net positive force required for propulsion.

Aluminium rollers are almost frictionless when moving. Static friction is considerably high. Maybe you would even get a similar result on an air hockey table too.

But it would simply not work in space. When the Fan goes forward, the casing would go backwards. After the impact the reverse would happen. The system would remain stationary.

Note: In the video the module is placed on aluminum rails separated by aluminum rollers (tubes) this setup permits a near frictionless surface for recording the video, unfortunately the rail assembly in not very visible on the video. A new video is in the works.

The forward movement is caused because there is static friction between the table and the 'closed system'.

In space what would happen is that the chamber and the fan inside would keep oscillating. When the fan moves forward the chamber will move backward. And after the bump, vice versa.

Net effect the 'system' will remain in the exact same position in space.

What if you add resistance to retropulsion?

It would be really nice if it was a closed system, but it isn't, while going forward, the propeller does give momentum to the box, but it is too small to overcome the friction with the table. When it bumps the box, it's momentum is used in a much smaller space of time,and it generates a greater force, large enough to overcome friction between the box and the table, what makes the box move. Nice try anyway.

I'm so close to being a believer now... if only in-space testing was feasible. I think if you could show the same results in zero-G, you'd win a lot of people over. Keep up the good work.

You dumb, boy?