The flight begin at a steady pace, at a height of 450m. The airship must proceed with a slightly “nose up” attitude in order not to lose altitude. The large fuel load and the densification of hydrogen in the envelope due to the freezing air make the airship heavy. A perfectly normal and expected phenomenon; Nobile solves it by slightly pulling up the bow. In this way, similar to an airplane, the airship uses its speed to develop lift and keep altitude stable.
At 18.45 the left engine suddenly stops.
