The cabin remained largely empty and was padded with a layer of cotton insulation. Four large boxes have been installed in the cabin for collecting data during test flights.

This paper presents the structure and main design parameters of thermal insulation heavy duty tanker for bitumen transport, as well as the design and test of thermal insulation layer of the tank.

It is showed in the test result that polyurethane foam heat-insulation layer has advantages such as weight light, strength high, absorbing water rate low and high heat -insulation effect and so on.