/sci/ - Science & Math

wow GTFO, yes it will.

yes, but i mean don't act like this is some sort of perpetual machine. You need to power the fucking fan. May as well have a motor.

Will this rocket take us to mars?

you'll need a goddamn battery

What if we extend the sail so that it complete encloses the fan?

Uh, how do you think propellers work, exactly?

OPs picture would have been better if instead of a motor, it was generating electricty using a turbine from the water flowing past the boat.
MAXIMUM TROLLING

>>1056274
Yes, if the man can move at 99% the speed of light.

actually, the sail makes it harder to move. get rid of that sail and you have a source of thrust (the fan by itself), pushing it to the right. the sail makes it want to move left, making it worse.

Or face the fan the other way and use it as propulsion.

:\

>>1056274
Only if you can get enough acceleration in the atmosphere not to plummet back down once the air gets too thin for continued thrust.

>>1056297
Then where does he get the gravity to power the turbine from?

>>1056312
Then put the fan underwater, because water is thicker than air

>>1056333
DERP

look up how sails work. Then come back to this thread.

>>1056342
>>1056341
>implying thats not what i was going for

>>1056312
This. The fan pushes itself (and thus the whole boat) to the right. Nobody cares for the sail.

>>1056333
OMG, /sci/ JUST DESIGNED THE MOTORBOAT

>>1056321
actually, if the propeller was providing enough thrust there would be enough acceleration to operate the water wheel even in the absence of a gravitational field.

>>1056314
Most intelligent thing said in this thread.

assuming there is no wind. the boat would move towards the right. if all air propelled by the fan was caught in the sail then it would remain stationary however it is almost impossible to assure every air particle with horizontal velocity hits the sail.
moves right

>>1056346
I'm just playing along, leave me alone ;_;

I don't think so bub. Seems to me that the fan is pushing toward the right and the sail is pushing toward the left. imho

>>1056274
the calories burned climbing that ladder over and over would massively outweigh the power provided. you'd be on the phelps diet

>>1056321
OH SHI-
The rocket is always accelerating.

>>1056375

> The ship is accelerating because the water is making the turbine turn

> The water is making the turbine turn because the ship is accelerating

Pick one, please

it wont go in any direction

>>1056864
holy shit that is a beastly sigma

>>1056864
Acceleration due to gravity.

>>1056274
>>1056274
>>1056274
>>1056864
>>1056864
>>1056864
>>1056864
>>1056864


though true, as it is the axiom of classical physics, a better and more easily understandable concept is:

dP/dt = 0 -> momentum is constant -> constant velocity -> no acceleration -> set the "constant" to zero with no loss of generality.

No movement, assuming no wind. You guys are fucking dumb, learn newton's third law.