Designs

[illusionist]

x3?!?
Also, only one rubberband, or can we have two small ones, chia?

And paradox said that he wouldn't tell me if this year's heli rules were exciting... I can see why

[chia]

We're allowed multiple motors in one helicopter. (Technically last year's allowed that too, but it wouldn't have worked well because each woulda been only 1 gram.)

[illusionist]

What is the definition of "Chinook-style helicopter"? I mean, how will Event Supervisors determine if it is a chinook-style copter? Will it just be common sense, or are there certain guidelines?

[chalker7]

What is the definition of "Chinook-style helicopter"? I mean, how will Event Supervisors determine if it is a chinook-style copter? Will it just be common sense, or are there certain guidelines?

There are guidelines, chinook-style is just the shorthand to help visualize it.

[illusionist]

Ohokay. Just as a general question (not pertaining to the rules), would it be best to still use counter-rotating props on the tandem-heli? I'm not sure what the rotational forces would be...

[blue cobra]

What is the definition of "Chinook-style helicopter"? I mean, how will Event Supervisors determine if it is a chinook-style copter? Will it just be common sense, or are there certain guidelines?

I'm thinking something like this.

Which has been done before.

[illusionist]

Yeah, that's the style. I just wanted to know what the ES would use to actually declare something as 3x flight time worthy

[thedoctor]

Ohokay. Just as a general question (not pertaining to the rules), would it be best to still use counter-rotating props on the tandem-heli? I'm not sure what the rotational forces would be...

I think you want to keep the counter rotating design so the rotational forces balance each other and your helicopter doesn't spin aimlessly.

[new horizon]

For the Chinook helicopter, you have to keep the counter rotating rotors. You have one rotor that spins CW and one that spins CCW, and assuming both have the same torque, they will theoretically cancel each other out. It's very similar to having two free rotors. If you don't cancel the torques out the entire helicopter will spin out of control, so even helicopters that have 1 main rotor have a tail one to cancel out the torque for stability.

[chia]

What is the definition of "Chinook-style helicopter"? I mean, how will Event Supervisors determine if it is a chinook-style copter? Will it just be common sense, or are there certain guidelines?

I'm thinking something like this.

Which has been done before.

How does the single rubber power both of the rotors on that helicopter? I've been trying to visualize some sort of transmission for a tandem-rotor helicopter, but I just can't seem to.