How to calculate the force required to lift an object into the air (helicopter)

AI Thread Summary
To calculate the force required to lift a helicopter, the primary factor is the weight of the helicopter itself. The discussion highlights the challenge of stability with only two fans, suggesting that this design may resemble a drone rather than a traditional helicopter. The revolutions per minute (RPM) of the fans is mentioned, but it's noted that RPM alone is not sufficient to determine performance without considering other fan characteristics. Overall, understanding the weight and fan dynamics is crucial for successful lift. The conversation emphasizes the importance of stability and proper calculations in designing a functional helicopter.
SIDDHARTH MANWANI
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Hey everyone,I am trying to make a helicopter using an AVR or ARDUINO BOARD I wanted to know how do I calculate the force required to lift the helicopter.Can anyone also help me how much revolutions per minute(r.p.m) should the fans generate.I am planning to use two fans.
 
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Welcome to the PF. :smile:
SIDDHARTH MANWANI said:
I am planning to use two fans.
How are you going to keep it stable? With only 2 fans (and no cyclic control of the main rotor like a full-size helicopter uses), that can be harder. Are you wanting to build something like a drone?

https://visitgreenland.com/wp-content/uploads/2017/09/aningaaq-_-drone3-e1505397720880-1500x630.jpg

aningaaq-_-drone3-e1505397720880-1500x630.jpg
 

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SIDDHARTH MANWANI said:
I wanted to know how do I calculate the force required to lift the helicopter.
BTW, there is a discussion going on now about the power requirements for drones lifting payloads in this thread: https://www.physicsforums.com/threads/lift-engine.951255/
 
SIDDHARTH MANWANI said:
Hey everyone,I am trying to make a helicopter using an AVR or ARDUINO BOARD I wanted to know how do I calculate the force required to lift the helicopter.Can anyone also help me how much revolutions per minute(r.p.m) should the fans generate.I am planning to use two fans.
I don't think you are asking the right questions here. Isn't the force obvious? It's the weight of the helicopter!

And RPM; it is only one of many related properties of fans and not that meaningful on it's own.
 

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