This is what happens when you watch a rocket-propelled skateboard using a watermelon in slow motion

YouTuber The Slow Mo Guys, who shoots various things with a high-speed camera and observes them in slow motion, has released a video shot with a high-speed camera that can shoot at 500 FPS and 10,000 FPS in an experiment in which a watermelon is tied to a skateboard and run by rocket propulsion.
First, prepare the watermelon by poking a hole in the bottom with a knife.

It's a bit of a waste, but I scrape out the contents.

Spark fireworks turn watermelons into rocket engines.

We packed as much of this as possible into the watermelon.

A watermelon stuffed with fireworks is tied to a skateboard and placed on a wooden board.
ignition

The watermelon explodes in flames. The skateboard moves forward.

However, after about one meter, the watermelon started to crack.

The flames grow and the skateboard moves forward, but it seems that the watermelon has completely exploded.

After the skateboard runs, embers from fireworks fly everywhere.

As for the watermelon, the back half had been blown away.

So, this time we tried an experiment with sparklers, which produce more smoke than fire.

As a result, the watermelon did not explode this time.

However, compared to the first attempt (below), there was too much smoke, making it difficult to see the fire, and the propulsion force was also weakened.

The third time, they changed to a sparkler with less smoke, sending the skateboard flying with a burst of intense sparks.

However, an unexpected incident occurred when his white coat, which was hanging quite far back on his skateboard, caught fire and was burned.

In high-speed video footage of the third experiment, flames can be seen shooting out of the watermelon.

However, if you look closely, you can see that a firework is shooting out along with the flames. It seems that one of the fireworks that shot out and flew away while still burning set the lab coat on fire.

Finally, we conducted an experiment in which a human rode a skateboard and was propelled by a melon rocket.

Although the thrust was weakened by the addition of the human's weight, the robot was still able to move a short distance.

To conclude the video, The Slow Mo Guys also experiment with placing a melon on the ground, stuffing it with sparklers, and making it erupt upwards like a volcano.

Flames captured by high-speed camera

As expected, the pressure gives way and the burning firework shoots out of the watermelon with force.

The Slow Mo Guys jokingly said, 'A rocket engine made from watermelons and fireworks might work for a short-distance drag race, but it wouldn't have enough fuel for a long-distance run.'

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in Video, Posted by log1i_yk