crew cabins, fixed landing gear and advanced wing mechanization (flaps and slat). The other aircraft, especially French, modified from serial designs, were less modern and had lower chances in technical trials. Aircraft participating were: Klemm Kl 32 (8), Breda Ba.33 (8), Heinkel He 64 (6), Praga BH-111 (3), PZL.19 (3), RWD-6 (2), Potez 43 (2), Farman 234 (2), Farman 353 (1), Darmstadt D-22a (1), Raab-Katzenstein RK-25/32 (1), Breda Ba.15S (1), Monocoupe 110 (1), Guerchais T.9 (1), Caudron C.278 (1), Mauboussin M.112 (1), Comte AC-12 (1). The German aircraft had starting numbers from a range: A4-A9, B1-B9, C2-C8, E1-E2, French: K1-K8, Italian: M1-M8, Polish: O1-O6, Swiss: S1-S2, Czechoslovak: T1-T4 (numbers were placed on fuselages in a black square frame). Technical trials On August 13 the technical evaluation of the competing planes' construction took place. Since it was a tourist plane contest, features such as: a comfortable cabin with a good view, seats placed side-by-side, a rich set of controls, modern construction, safety devices and folding wings were also awarded points. Most points were given to the Polish designs (86 points to the RWD-6 and 84 points to the PZL.19), behind them the Italian Breda Ba.33 (83 points) and Praga BH-111 (80 points). This gave them more than ten points' advantage over most feared German designs (Kl 32 - 71-72 points, He 64c - 66 points), and placed them as favourites from this point. Worst planes scored 44 points (Caudron C.278 biplane and Mauboussin M.12). The first trial was a minimal speed trial, to evaluate the aircraft safety, which was new in Challenge contests. Flying on the edge of stalling, Franciszek Żwirko was the slowest with 57.6 km/h speed, the second was another Pole flying an RWD-6, Tadeusz Karpiński. Behind them were the Italians, the German He 64s and the French Raymond Delmotte (C.278) with good results ranging from 61.2 to 65.7 km/h, and then the rest. The regulations did not expect such low speeds and therefore all seven results below 63 km/h were awarded with 50 points. Next there were trials of a short take off and landing, carried out in groups until 17 August 1932. The short take-off trial required the crews to fly over an 8-m high gate. The German pilot Wolfram Hirth (Kl 32) was the best, taking off from the closest distance (91.6m - 40 pts), two Italians Colombo and Lombardi scored 40 points as well, other