GURPS 3e: Making a duct-rotor helicopter

[Fred Brackin]

Originally Posted by GURPS Fox

So, I've been working on a CnC Tiberium/Generals fusion setting and one of the things I've been having problems with is designing duct-rotor helicopters (like the SA-2 Samson from Jake Cameron's Avatar) via GURPS Vehicle Builder.

I've been using multiple main rotors but I've been recommended to use concord wing rotors and seen a thread about using multiple coaxial rotors.

Is there any help in this regard?

I'll post a GVB writeup in a moment.

We may be having a terminology problem.

As far as Ve2/GVB goes there is no such thing as a "duct rotor". You can have "ducted fans" or several types of rotors (includign "Tilt rotors) but no "duct rotor".

Googling shows me a picture that qualifies as a "Ducted fan vertol" in Ve2/GVB. Though the fans are quite large.

You want "Ducted fans" from the "Airscrew" table on p.35 of Ve2. Then you want to go to "Vectored Thrust" on p.41

Avoid all helicopter drive trains..