Building helicopter....

[Jestersage]

I have been taking apart helicopters build by others (mainly the contra-rotors), but I still haven't quite figure it out. Can someone tell me how to put the two motors on top of each other?

Edited June 2, 2019 by Jestersage

[KerikBalm]

The part offset tool

[Jestersage]

2 hours ago, KerikBalm said:

The part offset tool

Can you elaborate? Do you mean, assuming a base part (say a capsule), one is mount on top by node, while another is mount radial to the capsule, and then use the tool to move (offset) such that it's above the other motor?

Edited June 2, 2019 by Jestersage

[KerikBalm]

Exactly. Hold shift to be able to displace parts as much as you want

 

[Terwin]

In the samples I saw, the contra-rotating blades were attached to both ends of a single powered rotor, but with an un-powered rotor connecting it to the main vessel(so that both ends of the powered rotor would spin freely, spinning the rotors in equal and opposite directions)

[Jestersage]

6 hours ago, Terwin said:

In the samples I saw, the contra-rotating blades were attached to both ends of a single powered rotor, but with an un-powered rotor connecting it to the main vessel(so that both ends of the powered rotor would spin freely, spinning the rotors in equal and opposite directions)

Uh... elaborate? Still have not figure out this setting.

[Cunjo Carl]

2 hours ago, Jestersage said:

Uh... elaborate? Still have not figure out this setting.

Place one motor atop another motor. Have the rotor blades on the top motor tilted in the opposite direction from the ones on the bottom motor. Turn on only the top motor, and automatically the bottom one will naturally counter-rotate without being turned on. At least that's what I found. Seemed kinda buggy with air friction though. Good luck!

[Guest]

What @Cunjo Carl says is correct. Additionally, disengage the motor on the freewheeling bottom one. Also, IME servos are more stable than motors as freewheels.

[Jestersage]

Right now, I have tried both, and I notice the radial+on-node contra-motors is more powerful than the powered+freewheel motor. Is it due to one is actively spinning and another is not?

[Guest]

On 6/8/2019 at 12:18 AM, Jestersage said:

Right now, I have tried both, and I notice the radial+on-node contra-motors is more powerful than the powered+freewheel motor. Is it due to one is actively spinning and another is not?

Yes.

[Rpatto92]

@Jestersage hey, if you're still building helicopters. I've just posted comprehensive guide.

here's a link: