page_title: Challenge International de Tourisme 1929
section_title: Technical trials
hierarchical_section_title: Challenge International de Tourisme 1929 / Technical trials
caption_attribution_description: English: The Potez 36 aircraft taking part in the "Challenge International de Tourisme", 1929. Čeština: Letadlo Potez 36 Závod "Okolo Evropy", 1929.
context_page_description: The Challenge 1929 was the first FAI International Tourist Plane Contest, that took place between August 4 and August 16, 1929 in Paris, France. Four Challenges, from 1929 to 1934, were major aviation events in pre-war Europe.
context_section_description: The first part of the contest were technical trials, starting on August 4. Unlike the following Challenges, it was not too complicated and consisted of a technical evaluation, quick engine start test, quick wing folding test and fuel consumption trial only.
  The first was a technical evaluation of competing planes' construction. Such features, like twin controls, rich set of controls, wheel brakes, fire safety devices and a room for parachutes, could bring up to 18 points. Most points was given to the Italian Breda Ba-15s (11.75 to 12 pts) and German all-metal Junkers A50s (11.75 pts). Very good result of 11.25 points was obtained also by the Italian Fiat AS.1s and Romeo Ro-5s. The German BFW M.23b were given only 9.5 points, DH-60s - from 9.5 to 10.5 points, and the lowest result was 8 points (Caudron C.113).
  After quick wings' folding and quick engine starting tests, the classification leader was the Czech Josef Novak flying an Aero A.34 biplane, with 17.5 pts. Behind him, there were three Italians flying Romeo Ro-5 biplanes (17.25 pts), then the rest. The best German pilot, Wolf Hirth, had 16.25 pts (12th place, Klemm L.25), but most Germans had a few points less. Some planes were handicapped, not having folding wings. Some crews completed wings' folding trial on 6 August.
  The last was a fuel consumption test, on 6 x 50 km closed circuit, on 5 August. It could bring up to 20 points. The best result was obtained by the German Johannes Nehring flying a Darmstadt D-18 biplane (18.5 pts), then the Swiss Hans Wirth (Klemm L.25), three German Junkers A50 and two Czech Avia BH-11s, with 15-17 pts. The German Klemms also were good at this trial, with 12-14.5 pts.
  The fuel consumption trial changed the general classification order. The three leaders, with 32 pts each, became Johannes Nehring (Darmstadt D-18), the Swiss Hans Wirth (Klemm L.25) and the Czech František Klepš (BH-11). Further places, from the 4th to the 10th, were occupied by the German crew of Klemms and Junkers', with 29,5 - 30,5 pts, the best of them was Robert Lusser. The best Englishman, Hubert Broad, was on the 15th place, while Winifred Spooner was on the 25th place (22.5 pts). The German BFW M.23b's occupied poor positions, the best result of the BFW was 25 pts, while Fritz Morzik flying BFW gained only 19.5 pkt, what gave him the 30th place. John Carberry, flying the German RK-25, occupied the last 47th place with mere 12 pts. The point differences were not high, but they were not easy to level during the next part of the contest.
  Eight crews dropped out during technical trials, mostly due to engine malfunctions during the last trial. After having dropped out in a fuel consumption trial, the German Arado L.1 was crashed by its designer H. Hoffmann, while trying to show some aerobatics over the airfield.
caption: The Potez 36 aircraft taking part in the "Challenge International de Tourisme", 1929.
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