Tandem Rotor Helicopter

[@mrabhi100k]

Thanks

[@isaacbrooks1430]

You should go over differential collective pitch in tandem rotor helicopters!

[@gabedarrett1301]

How does the synchronization shaft handle the extreme torsion load? Does it have anything to do with those two connectors on the shaft itself?

[@bzig4929]

I'm not really sure I can answer. I've seen them up close and there's nothing special... the sections are just thin walled metal tubes. In some aircraft they are carbon fiber. The connections are flex plates that allow for some small misalignment because the aircraft bends and twists under flight loads.

[@isaacbrooks1430]

Chinook pilot here, the synch shafts move a lot! In all directions under load. I’ve often wondered the same thing but they work like the drive shaft going to a rear differential in any conventional car. They are rather thin walled hollow shafts but they are very finely machined and inspected. It’s still a bit of magic to me but they are proven!

[@EwF.5426]

How to work coaxial rotor?

[@Tradiejoe284]

I believe a coaxial rotor would literally just be two rotors connected together, except the top one would be rotating in another direction instead of the bottom to counter torque. They'd pretty much just be stacked on-top of eachother.