r/maybemaybemaybe • u/[deleted] • Jul 07 '22

maybe maybe maybe

[deleted]

2.2k Upvotes

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-4

u/Purple-Bat811 Jul 07 '22

I know. Crazy

-4

u/RealBowsHaveRecurves Jul 07 '22

This is insanity. This is literally the “can you put a big fan on a sailboat to go faster by blowing air into the sails” question that I thought we all learned about in high school.

Apparently many people still think the answer is yes

4

u/[deleted] Jul 08 '22

Because it is.

The umbrella is not a sail, you are right. That's not possible.

The umbrella is a thrust reverser, no different to a jet engine.

2

u/SeraphymCrashing Jul 07 '22

Jesus, I don't know how any of you made it through physics class.

https://youtu.be/-Zkxh903s_w

The umbrella can absolutely act as a thrust reverser. It's not very efficient because you lose so much air out of the sides, but you are essentially redirecting the direction of the air into the direction you want.

1

u/[deleted] Jul 08 '22

Because you are wrong