Both Y and T types have 3 compartments, one for the pilot and fuel and two passenger compartments, each for between 3 and 6 passengers. The pilot‘s compartment in a Y type is designed to take up to 6 fuel cylinders and the T up to 5. The overall capacity is then pilot + 6, 8, 10, or 12 passengers. There is the option to have an extra crew person or passenger in the pilot compartment, however, if this extra person is carried then the number of fuel cylinders must be reduced in accordance with the Flight Manual.