How much effort to lift a human being?

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    Human Lift
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SUMMARY

The discussion centers on determining the appropriate propeller size and motor power required to lift a 180 lb person to a height of 30 feet. It emphasizes the use of a two-bladed propeller and references the need for a static thrust calculator to ascertain the specifications. Theoretical calculations indicate that for a helicopter weighing 700 kg, a rotor diameter of 7 m requires approximately 60 kW (80 hp) of induced power for stationary flight. This establishes a foundational understanding of the mechanics involved in vertical lift.

PREREQUISITES
  • Understanding of static thrust calculations
  • Familiarity with helicopter flight mechanics
  • Knowledge of motor power requirements for lifting
  • Basic principles of aerodynamics
NEXT STEPS
  • Research "static thrust calculator" tools for propeller sizing
  • Study "mechanics of helicopter flight" for deeper insights
  • Explore "induced power calculations" for lifting scenarios
  • Investigate "two-bladed propeller designs" and their efficiencies
USEFUL FOR

Aerospace engineers, hobbyists designing lift systems, and anyone interested in the mechanics of vertical flight will benefit from this discussion.

Quinton Powell
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What size propeller is required to lift a 180 lb person 30ft into the air consistently? Also, how powerful would the motor have to be to lift itself, the propeller, and person?
 
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Are you trying to build something like this:
SafetyDropDevice1799664Diagrams-500px.jpg
 
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Not quite. I am looking for a 2 bladed prop. This is a theoretical question at this stage.
 
I think you can google "static thrust calculator" and find what size of propellers and motors are available.
 
From the Wikipedia page on mechanics of helicopter flight:

For stationary flight, out of ground effect, and for a helicopter weight F

cdd56de2fb1d84301b85a40a64a5f08a.png
where
f7f177957cf064a93e9811df8fe65ed1.png
is the air density.
The induced velocity needed for lift will be:

c156e32e0ff208f5a8d8e08077c3f67b.png

and the power (called induced power) :

37f0f92dbf516491e96abca115e01ac8.png
.
For example, in the case of a small helicopter of 700 kg mass and a rotor diameter of 7 m:

aa19a1fb9f74bc6fabff04d9edff75ae.png


= 60 kW = 80 hp

.
 

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