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A new form of power

Started by Iscamn00bs [2113321] on in Science.

5 replies · 52 views · thread synced · 3 days ago · View on torn.com
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Iscamn00bs [2113321] · #1

Could we helicopter power?

 

I heard in Japan they got sidewalks that form power by walking

 

Could men turn themselves into power turbines via the helicopter 

Lampboy [4323679] · #2 · edited

Sorry what do you mean? That we could power a motor that can rotate helicopter blades? That wouldn’t be possible, the powerr japan design gets is just enough for lighting and light stuff. If you wanna power helicopter you gonna need to not just walk but spend energy in rotating something. Like you do in bicycle and paddle boats. Thats the limit. We have to consider the helicopters own weight and the people powering it inside it. The weight results in downward force. To equal it we need to change total momentum( total mass x change in velocity) of the system per unit time( thats the mathematical definition of force). 

so ignoring air friction and other complexities, assuming N number of people in helicopter all weighing 60kg, helicopter weighing 500kg

 

total mass= (N x 60 ) + 500

 

so total force downwards (gravity) = 9.8 x [(N x 60) + 500] 

 

need to overcome it to just hover

 

lets say we want our heli to reach upwards speed of  1m/s in 1 second 

 Additional Force required to go up = (mass x change in velocity)/time= (mass x 1)/1 = mass ( which equals[(N x60) + 500] )

 

total force = mass + (mass x 9.8)


thats the force we will be required to generate. Now, since we exert power which is capped at around 100 watts for safe continuous work, and power = total force x velocity, power need is =[ mass + ( mass x9.8) ]  x 1

 

power we can generate = 100 x N

 

and 

 

so power needed >>>> power generated.

 

even if you used gears, it multplies force but reduced speed of movement . 

also the blades of heli would be hellish large and wont be able to adjust for weight : force ratio for our system

 

 

 

Edit: im just a medical doctor, my calculations might be wrong