
ELI5: What are the rods attached to the rotor of those toy helicopters for? And How do they work?
For reference, this guy, https://www.toysrus.com/products/worlds-smallest-r-c-helicopter-west0966?srsltid=AfmBOorgwBoO3LPpvPfMcgRmwd3AFwN_9KiZ3Pwrx0XDsZZIfbhbOKz9, has horizonal a rod placed above the top rotor, Why is it there? What purpose does it serve and how does it work?