Full Scale Tests of Slots and Flaps on a Heinkel He.64

Another scarce pamphlet from the small collection we are listing today and issued by the Air Ministry against Memoranda nos 1713 and dated 1936. The Heinkel He 64 was a sports plane built in Germany in 1933 to participate in the touring plane championships that year, designed by Siegfried and Walter Günter. The He 64 was a sleek, low-wing monoplane of conventional configuration. The pilot and passenger sat in tandem under a streamlined canopy. Six examples were entered in the championships, which represented almost every example of the type built, the only exception being the first prototype, which had crashed. The He 64s excelled in speed trials, taking the first three places in the Europa Rundflug ("Rally over Europe"), and the first five places in top speed trials. They also had high positions in minimal speed trial.

Interestingly our research indicates one example of the He 64C was imported into the United Kingdom in 1933 for flap research, at first with Handley Page then with the Royal Aircraft Establishment until 1935. This aircraft later flew in Rhodesia until 1952. It would appear therefore that this report relates to work carried out here in the UK on this air frame.

The pamphlet made up of 15 pages with a card cover front and back was published on 5th November 1935 and includes line drawings of the aircraft, graphs and systems of axis diagrams inside the back cover. When published by the Air Ministry the cover price was 2/6d. The cover is also marked 'For Official use' and has been ink stamped 19 Feb 1965 like the He.70 pamphlet we have also listed today. Clearly quite a specialist subject but from a layman's point of view it is interesting the Air Ministry was taking note of Germany's pre-war aircraft development programme as far back as 1933. Another one off in exceptional condition and when it is gone it is gone!