Grabmann joined the Police force in 1924, learning to fly and serving with the Luftpolizei (Air Police), assigned to Flight Surveillance North Bavaria, Fürth. He then enlisted in the Luftwaffe in October 1934, and served as Adjutant, Jagdgeschwader 134 "Horst Wessel" from March 1936.
From September 1938 to March 1939 Major Grabmann was Commander of Jagdgruppe 88 with the German Condor Legion in Spain, equipped with Heinkel He 51 biplanes and early versions of the Messerschmitt Bf 109. He claimed a Polikarpov I-15, I-16 and an SB-2 bomber all shot down on 23 September 1938. Another SB-2 was downed on 10 October 1938, and a I-16 on 15 October. His last claim (an I-15) was on 4 January 1939.
Following his return to Germany, he was appointed Gruppenkommandeur (group commander) of I.(Zerstörer) Gruppe of Lehrgeschwader 1 (LG 1—1st Demonstration Wing) on 1 April 1939, succeeding HauptmannAxel von Blomberg in this capacity.[1] At the time, the unit was based at Barth and had just been equipped with the Messerschmitt Bf 110 heavy fighter, the first Luftwaffe unit to receive this aircraft.[2]
In July 1939 he served with V.(Z)/LG 1. Whilst providing cover for the Heinkel H 111Ps of II./Kampfgeschwader 1, LG 1 encountered Polish PZL P.11s of the Brygada Pościgowa over Warsaw on the evening of 1 September 1939. Major Grabmann was wounded in this encounter when his Bf 110 was hit by fire from a Polish PZL P.11 fighter.
On 15 April 1940 Grabman became CO of Zerstörergeschwader 76. On 18 May 1940 Royal Air ForceHawker Hurricanes shot down 3 Bf 110Cs of ZG 76, including Grabmann, while flying a low-level attack on Douai airfield. He parachuted to safety (his gunner Fw. Krone was killed) and was captured by French troops. Grabmann was rescued six days later by an advancing German panzer column.[3]
In August 1941 Grabmann commanded Zerstörerschule 2 in Memmingen, and in August 1942 was appointed Fighter Leader for the Holland area (Jafü Holland). During this time Grabmann flew a Focke-Wulf Fw 190A-5, (Werknummer 410054—factory number) "X" as his personal mount. In November 1943 Grabmann became Commander, 3. Jagddivision and then 1. Jagddivision in April 1945.
General Major Grabmann was taken prisoner at the end of the war, and repatriated to Germany in May 1948.
He died in Munich on 20 August 1992.
Summary of career
Aerial victory claims
According to Obermaier, Grabmann was credited with 13 aerial victories, seven in the Spanish Civil War and six on the Western Front of World War II, claimed in approximately 250 combat missions, 137 of which in Spain.[4] Mathews and Foreman, authors of Luftwaffe Aces — Biographies and Victory Claims, researched the German Federal Archives and found documentation for 13 aerial victory claims. This number of confirmed claims includes seven claims during the Spanish Civil War and six over the Western Allies.[5]
Chronicle of aerial victories
This and the – (dash) indicates unconfirmed aerial victory claims for which Grabmann did not receive credit. This and the ? (question mark) indicates information discrepancies listed by Forsyth, Mathews and Foreman.
Fellgiebel, Walther-Peer[in German] (2000) [1986]. Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939–1945 — Die Inhaber der höchsten Auszeichnung des Zweiten Weltkrieges aller Wehrmachtteile [The Bearers of the Knight's Cross of the Iron Cross 1939–1945 — The Owners of the Highest Award of the Second World War of all Wehrmacht Branches] (in German). Friedberg, Germany: Podzun-Pallas. ISBN978-3-7909-0284-6.
Mathews, Andrew Johannes; Foreman, John (2015). Luftwaffe Aces — Biographies and Victory Claims — Volume 2 G–L. Walton on Thames: Red Kite. ISBN978-1-906592-19-6.
Obermaier, Ernst (1989). Die Ritterkreuzträger der Luftwaffe Jagdflieger 1939 – 1945 [The Knight's Cross Bearers of the Luftwaffe Fighter Force 1939 – 1945] (in German). Mainz, Germany: Verlag Dieter Hoffmann. ISBN978-3-87341-065-7.
Prien, Jochen; Stemmer, Gerhard; Rodeike, Peter; Bock, Winfried (2000). Die Jagdfliegerverbände der Deutschen Luftwaffe 1934 bis 1945—Teil 1—Vorkriegszeit und Einsatz über Polen—1934 bis 1939 [The Fighter Units of the German Air Force 1934 to 1945—Part 1—Pre-War Period and Action over Poland—1934 to 1939] (in German). Eutin, Germany: Struve-Druck. ISBN978-3-923457-54-0.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives [The Knight's Cross Bearers 1939–1945 The Holders of the Knight's Cross of the Iron Cross 1939 by Army, Air Force, Navy, Waffen-SS, Volkssturm and Allied Forces with Germany According to the Documents of the Federal Archives] (in German). Jena, Germany: Scherzers Militaer-Verlag. ISBN978-3-938845-17-2.
