Helicopter Physics Series - #2 Chopper Control - Smarter Every Day 46

TL;DR

This video provides an in-depth explanation of how helicopters work, including the role of a swashplate in controlling pitch and the three types of control: collective pitch, cyclic pitch, and antitorque.

Transcript

Alright. This is totally easy once you understand the physics. Watch this. Left, yep right, go back to the right. It's easy! [unintelligible] flip. 1..2..3.. Yeah! Awesome! So, as a kid I spent many an hour in a book about the drawings of Leonardo Da Vinci. In particular his flying machines. Check out this medieval helicopter. It looks like it wo... Read More

Key Insights

• 🎮 The main rotor system on a helicopter provides both lift and control, with the swashplate playing a crucial role in controlling pitch.
• 👻 Different types of control, including collective pitch, cyclic pitch, and antitorque, allow for precise maneuverability.
• 🍸 The antitorque system, such as a tail rotor, counteracts the rotational torque generated by the main rotor blades.
• 🚁 The collective control affects the altitude of the helicopter by changing the pitch of both blades simultaneously.
• 🚁 Cyclic pitch, controlled by tilting the swashplate, enables the helicopter to move in any direction.
• 🐎 The speed of the rotor blades remains constant during collective and cyclic pitch control.
• 🍸 The tail rotor or antitorque system prevents the helicopter from rotating in the opposite direction.

Questions & Answers

Q: How does a swashplate work to control pitch on a helicopter?

A swashplate converts non-rotating to rotating control motion. It can rotate forward or aft for cyclic inputs and move up or down for collective pitch, which changes the pitch of both rotor blades simultaneously.

Q: What is the purpose of the antitorque system in a helicopter?

The antitorque system, typically a tail rotor, counteracts the torque generated by the spinning rotor blades. It allows the helicopter to maintain stability and prevents it from rotating in the opposite direction.

Q: How does the collective control affect the altitude of a helicopter?

The collective control changes the pitch of both rotor blades simultaneously, altering the bite of air the blades take and causing the helicopter to ascend or descend. The speed of the blades remains constant during this control.

Q: What is cyclic pitch and how does it affect the helicopter's movement?

Cyclic pitch involves tilting the swashplate, which changes the pitch of the blades at every revolution. This control allows the helicopter to move in any desired direction, including pitch and roll.

Summary & Key Takeaways

• Helicopters use a swashplate to control pitch on the rotor blades, with varying pitch affecting lift and control.

• There are three types of control: collective pitch, which changes the pitch of both blades to control altitude; cyclic pitch, which tilts the swashplate to control pitch and roll; and antitorque, which uses a tail rotor to counteract the rotational torque of the main blades.

• The main rotor system provides both lift and control for the helicopter.