Felice Trojani collaborated with Umberto Nobile on which aircraft that was the first to reach the North Pole?
Aeronautica Umbra Trojani AUT.18:  It was designed in 1934 by Ing Felice Trojani, who at that time was collaborating with Umberto Nobile on the Arctic flights of the airships "Norge" and "Italia". Umberto Nobile:  He is primarily remembered for designing and piloting the airship "Norge", which may have been the first aircraft to reach the North Pole, and which was indisputably the first to fly across the polar ice cap from Europe to America.
Norge