Posted this during Singapore's National Day 2020. I had always wanted to draw the interiors of the Super Puma Helicopter. As part of the National Day theme. One side is Singapore in 1976 while the other side is present-day Singapore. 

The 1976 part was drawn with references from old photographs taken in 1950s - 1970s to roughly determine locations and buildings for 1976. 

I also referred to photographs & videos taken by military aviation photographers and the Republic of Singapore Air Force for the interiors of the Super Puma. The drawn interiors is definitely more spacious than the actual thing.