Heinz Schnaufer entered the Luftwaffe as a trainee officer-pilot in November 1939, and completed his flying training in 1941. At the Heavy Fighter School (Zerstorerschule) at Wunstorf he met Fritz Rumpelhardt, who became his Funker (radio/radar operator) and flew with him, with a break in 1943, until the end of the war. At this time Schnaufer and Rumpelhardt agreed to volunteer to fly with the newly-formed Nachtjagd, the night-fighter arm of the Luftwaffe. In November 1941, on completion of their flying training, they were posted to II./NJG 1 at Stade, near Hamburg, later transferring with the same unit to Saint-Trond, Belgium. Throughout his career Schnaufer only flew the Bf 110 operationally, despite subsequently commanding a Geschwader equipped with the Ju 88.

Schnaufer's first operational experience came in February 1942, when II./NJG 1 were detached to fly escort for the capital ships Scharnhorst, Gneisenau and Prinz Eugen when they broke out from Brest en route for Norway. His first 'kill', however, did not come until the night of 1st/2nd June 1942, when he shot down a Handley-Page Halifax near Louvain, Belgium. By the end of the year his score stood at only 7, including three in a night on 1 August. It has often been said that Schnaufer was a "slow starter", but at that time Bomber Command activity in his area was only moderate.

Schnaufer was promoted Oberleutnant in July 1943, when his score stood at 17. In August he transferred to IV./NJG 1 at Leeuwarden, Holland, where he became Staffelkapitän 12./NJG 1 (IV./NJG 1). He remained there, with a detachment to Quakenbruck in September/December 43, until March 1944, when he was appointed Kommandeur IV./NJG 1 and moved with the unit back to Saint-Trond. By this time he had shot down 47 RAF bombers. There was also, by this time, a third man in Schnaufer's crew, Wilhelm Gansler, employed mainly as a look-out, an "extra pair of eyes". In December 1943 Schnaufer had been awarded the Ritterkreuz, with his score standing at 42.

Schnaufer remained as Kommandeur IV./NJG 1 until November 1944, being promoted Hauptmann in May 1944 and receiving the Eichenlaub in June after 84 victories. He was awarded the Schwerter in July, with his score at 89. In July, too, his two crewmen, Rumpelhardt and Gansler, were awarded the Ritterkreuz. In September 1944 IV./NJG 1 retreated back into Germany, being stationed temporarily at Dusseldorf and Dortmund. Schnaufer achieved his 100th night-time victory on 9 October 1944, for which achievement he was awarded the Brillanten by Adolf Hitler.

The following month Heinz Schnaufer, still only 22 years old, was made Kommodore NJG 4, based at Gutersloh. At the end of the year his score was 106. In December he was promoted Major.

Schnaufer's greatest one-off success came on 21 February 1945, when he destroyed 9 RAF heavy bombers in the course of one day, two in the early hours of the morning and a further seven in the evening. Post-war research suggests that in fact his total that day was 10, one claim not having been acknowledged.

At the end of the war Schnaufer's official tally stood at 121. He was taken prisoner by the British in May 1945 at Eggebek in Schleswig-Holstein, but was released later that year and returned to Calw, where he took over the reins of the family wine business, his father having died during the war. By the time of his death in 1950 he had built up the business to a very prosperous concern. His end came when, during a wine-purchasing visit to France, his open sports car was in collision with a lorry on the main road south from Bordeaux. The lorry had failed to observe right of way and entered the main road illegally. Heavy gas cylinders from the lorry fell on to Schnaufer's car, at least one of them hitting Schnaufer on the head. He died in hospital two days later, on 15 July 1950.

This summary by Peter Hinchliffe, OBE, author of "The Other Battle", currently writing the biography of Heinz Schnaufer for Crecy Books Ltd.