F-105 Thunderchief - Walk Around Number 23 (Squadron/Signal Publications 5523)

The Republic F-105 Thunderchief was developed to meet a United States Air Force (USAF) need for a fighter bomber capable of both replacing the Republic F-84 Thunderjet and carrying nuclear weapons. Republic Aircraft Company's proposal AP-63 was developed in 1953 and was later designated F-105 by the USAF. The Thunderchief, eventually to be referred to as the Thud was the largest single engine jet fighter ever developed for the Air Force.