ตัวเดียว บน ล่าง ไม่ต้องกลับ งวดนี้ลงให้แล้ว ดูเลย 2 พฤษภาคม 2562
The future of the airship looks to be likely to come in the form of the hybrid airship, so called due to its mix of aerodynamic lift and traditional helium lift gas that will allow them to carry significantly larger payloads than conventional airships. Helium lift gas provides anywhere from 30% to 80% of the aircrafts lift with the remaining lift being provided by wings or an aerodynamic body shape, like conventional aircraft.
from: http://ezinearticles.com/?The-Hybrid-Airship&id=1055874
