, 1923 Geddes developed the overall design concept while German aeronautical engineer Otto A. Koller provided the engineering expertise as Geddes was not a trained engineer. The two had clashed over Airplane Number 1 in January 1930, after Koller had described it as "an absolute[ly] undesirable design." Koller then declined to provide performance specifications for its replacement, Airliner Number 4, which Geddes intended to include for publicity purposes in his upcoming book Horizons'' (Little Brown, New York, 1932). Geddes devoted over ten pages of the book to the project, including a fulsome endorsement of Koller's skills as an aircraft engineer on page 111 and detailed cut-away plans of the aircraft. Although uncredited in
Horizons, the striking illustrations of the aircraft may have been drawn by the young
C. Stowe Myers who had his first job in Geddes's office and was tasked with creating the illustrations for the book. Designed as a V-shaped
monoplane with nine decks, large capacity, viewing galleries, and public areas big enough to hold an orchestra, Geddes intended Airliner Number 4 to replace the ocean liner. It was not the first design to feature a giant wing.
Le Corbusier's
Vers une architecture (1931 edition) had included an illustration of the "airplane of to-morrow" that featured windows along the edge of the wing like Airliner Number 4, but, unlike it, had three tail fins and the engines mounted behind the wing, rather than above. Geddes described Airliner Number 4 as an "airship" in
Horizons (p. 111) and compared his design with that of the largest aircraft so far built — as far as he was aware — the 48-meter wingspan
Dornier Do X, which he said could carry 150 people, but not in comfort. The largest-dimensioned aircraft
actually built anywhere during the 1930s, the Soviet Union's six/eight-engined, 63-meter wingspan
Tupolev Maksim Gorki, was not revealed until 1934. ==Planned operations==