What is the x-shaped thing on the roof?
comms
Propeller
A brace/mount for something, I reckon
>>31927971
Antenna. It could be for a lot of things.
Grappling hook launcher.
The knot
>>31927971
>>31927990
Definitely this, probably to counteract the engines torque on the chassis during precision maneuverings.
>>31927971
It's like a propeller hat, but for a truck.
>>31927971
https://www.google.com/patents/US6975178
Antenna for radio
Wind powered generator
Everyone has to do their part to go green!
>>31927971
rebel flag shaped antenna to recieve orders from general Lee
>>31928035
Thanks
Apparently it's known as an "X-Wing antenna"
>>31928009
Buldin confirms this
>>31927971
Satellite radio antenna