How to implement chariot/trailer vehicle

Related question: [How can I attach and detach a trailer to my truck][1]. Previously posted on the forums [here][2], but no responses.

I’m using Blender for 3D modelling, and UE4.11 with Blueprint scripting. I’m trying to design a chariot vehicle, although it should be functionally equivalent to a trailer type vehicle. I.e. I want two wheels that spin freely, and the vehicle is towed by some other object.

http://cornucopia3d.e-oncontent.com/storeItems/Objects/Vehicles/Terrestrial/4_Roman_Chariot_Obj_3_0_img.jpg

I’ve tried modifying the simple vehicle blueprint, but the vehicle movement blueprint class expects things like torque curves, engine RPM, number of gears, clutch strength etc. Is it possible to design a vehicle using this class that doesn’t have an engine, and freely gets towed?

Thanks!