Lyle, Frank gives good advice. The box will have to be very strong. Baggage Handlers are not gentle. Itsnot possible to be easy on the luggage when you have 3 more planes to unload. You may want to look at shipping the plane as "freight" to your location on the same plane. I am not sure a box that can hold a Nobler will even fit in the baggage handling equipment. SHipping as freight will require you go to a different location at your destination airport to get your model plane. Call the airline with your box size for the best instructions.
Shipping fuel will not be worth the hassle of boxing it as "HazMat". Hazardous materials is a serious issue when using airfreight. Not declaring fuel and hiding is out of the question, you will get hammered if you get busted. I have seen more than one aircraft fire caussed by improperly contained HazMat.
Myself, like many on the forum, work in the airline industry. Others may have different advice.
Good luck shipping your model, let us know what you find out.
Greg