Achieving thrust

[bananasrawesome]

Nevermind this, I saw a thing called Firespitter.

I know the engine and engine fx modules already exist but what do I put in my plugin code to make a part produce thrust? I'm trying to figure out how the stock engine module works but I'm having issues with that because I can't see the source for it. I at least know it increments/decrements a vector based on throttle and fuel input somehow and the api documentation at the wiki isn't showing the somehow.

Edited September 1, 2017 by bananasrawesome
Problem solved

[Fengist]

Are you trying to create an engine and use those partmodules or are you trying to apply thrust to a specific part?

[Shadowmage]

The following methods add forces to a part (thrust):

part.addForce(Vec3 force)
part.addForceAtPosition(Vec3 force, Vec3 pos)
part.addImpulse(Vec3 force)
part.addTorque(Vec3 torque)

Those mostly link back to the low-level Unity Rigidbody add-force methods.  You can read up on those:  https://docs.unity3d.com/ScriptReference/Rigidbody.html