|Born||3 March 1887
Ottorowo, Province of Posen, Kingdom of Prussia, German Empire
|Died||18 January 1982
|Years of service||1915–1918|
|Unit||Kasta 29, Jagdstaffel 5|
|Awards||Iron Cross First and Second Class|
|Other work||World War II service|
Josef Mai was born in Ottorowo, Province of Posen. His original military service began on 3 October 1907 with the 10th Lancers. When World War I began Mai was part of the offensive aimed at the French capital of Paris. He later took part in the fighting around Warsaw, Poland. In 1915 he campaigned along the Dniester River. He also served at the battles of Verdun and the Somme.
Mai joined the German air service in 1915; he trained at the Fokker plant at Leipzig. He originally served in Kasta 29, flying reconnaissance aircraft in 1916. He then underwent fighter training and joined Jagdstaffel 5 in March 1917. As a Vizefeldwebel, he was one of three non-commissioned pilots (along with Fritz Rumey and Otto Koennecke) who flew together so successfully they ended up claiming 40% of the Jasta's victories between them, and making Jasta 5 the third highest scoring unit of the war. The trio was nicknamed "The Golden Triumvirate".
Mai scored his first victory on 20 August 1917, flying an Albatros D.V, and downing a Sopwith Camel of No. 70 Squadron. His fifth victory, over a RAF SE.5a, was on 30 November. Mai did not score again until 13 January 1918. On 25 April 1918 he forced down British 18-kill ace Lt Maurice Newnham of No. 65 Squadron, for his tenth victory.
By May 1918 Jasta 5 was sharing an airstrip with Jagdgeschwader 1, and as the "Flying Circus" re-equipped with new Fokker D.VIIs, Mai started flying a cast-off Fokker Dr.I triplane. He flew this triplane (Serial No. 139/17) for his next victory, over a pair of aces in a No. 11 Squadron Bristol F.2B. Pilot Lt Herbert Sellars (8 claims) was killed although Observer Lt. Charles Robson survived and taken prisoner. He claimed three victories with the Triplane.
Mai was prone to paint his planes in a "zebra stripe" pattern,with black and white striping on the fuselage angled to the left viewed from the starboard side. his theory being the optical illusion would help to throw off an enemy pilot's aim. Painted on this background was his insignia of a star and crescent. His Albatros and D.VII were known to bear this paint scheme although his Dr.l paint scheme is uncertain.
On 19 August 1918 he had his most successful day. He attacked two Bristol F.2B fighters from No. 48 Squadron, Royal Air Force. As he hit one Brisfit with incendiary ammunition, the other swerved away from the incoming fire and collided with his wrecked companion. Mai followed up this double kill by downing a 56 Squadron SE.5a later.
On 3 September he was wounded in action in the left thigh. Nevertheless he scored again two days later, and added five more victories during September.
Mai's 26th victory was a No. 64 Squadron SE5a on 5 September 1918. On 27 September 1918, the day of his 29th success, Mai was promoted to Leutnant. His friend Fritz Rumey was also killed in action on that day.
Mai claimed his 30th and last score, a Bristol F.2B of 20 Squadron, killing the 6-kill ace crew of Lt. Nicholson Boulton and 2/Lt. C.H. Chase on 29 September 1918. 15 had been claimed with the Fokker D.VII, 12 with the Albatros and 3 with the Fokker Dr.I.
- "Josef Mai". Theaerodrome.com. Retrieved 2015-07-26.
- "Edition information". Military-art.com. Retrieved 2015-07-26.
- "Jasta 5". Theaerodrome.com. Retrieved 2015-07-26.
- Albatros Aces of World War I. p. 39.
- "S.E.5 Aircraft Art - British WW1 Aviation Prints". First-world-war.com. Retrieved 2015-07-26.
- Fokker D.VII Aces of World War I. p. 39.
- Albatros Aces of World War I. p. 23.
- Fokker D.VII Aces of World War I. pp. 40–41.
- "Fritz Rumey". Theaerodrome.com. Retrieved 2015-07-26.
- Norman Franks, et al. Fokker D VII Aces of World War I: Part 2. Osprey Publishing, 2004. ISBN 1-84176-729-8, ISBN 978-1-84176-729-1.
- Norman Franks, et al. Fokker Dr I Aces of World War I. Osprey Publishing, 2001. ISBN 1-84176-223-7, ISBN 978-1-84176-223-4.
- Norman Franks. Albatros Aces of World War I. Osprey Publishing, 2000. ISBN 1-85532-960-3, ISBN 978-1-85532-960-7.