Heinkel is one of Germany's most powerful aircraft manufacturers, and historically it was a pioneer in jet flight. However, in this time and space, Xiao Weiguo's Dragon Soul Ordnance Complex took the lead, and the M29 competitive jet aircraft had already appeared on the Paris airport. This time it was the He51 fighter that came to participate in the competition, which was the first fighter launched by the Heinkel company for the rearmament of Germany, and it was the last generation of biplane fighters, and the design was mediocre. Historically, the Spanish Civil War broke out in July 1936, and the He51 entered Spain as a fighter of the Condor Corps to support General Franco, and the main opponent of the He51 in Spain was the Soviet-made I-15 and I-16 of the Republican Army, and the He51 was inferior to the I-16, and had to hand over the air combat to the Bf109B fighter and change to a ground attack aircraft. It has an empty weight of 1,460 kilograms, a maximum take-off weight of 1,900 kilograms, a maximum level flight speed of 330 kilometers per hour, a ceiling of 7,700 meters, and a range of only 570 kilometers. Compared to the A1 attack aircraft in many ways, it is quite inferior, but the Heinkel company obviously wants to advertise in order to get more orders.

Juncker still came to the Ju52/3m transport aircraft, under the suppression of the M30 transport aircraft, this kind of transport aircraft that was once very famous in history, only 30 were sold before participating in the competition, but Juncker also learned some advanced design concepts from the M30 transport aircraft, and transformed this transport aircraft. The engine was replaced with a 1000 hp American Wasp piston engine, and the body was also improved to reduce some of the weight, so that its performance was also improved. But. As soon as Juncker saw the M30 transport plane on the scene, he knew that this time it was difficult to win, although it had surpassed the M30 transport aircraft in terms of maximum take-off weight and deadweight capacity, but he knew that it was still not good in terms of speed and range.

Italy came three companies, among which the company Ebreda brought the Ba.65 Bio aircraft, which was a combat-attack aircraft. It can perform both air combat missions and ground attack missions, which is similar to the A1 attack aircraft. However, in terms of size and weight, it is larger than the A1 attack aircraft, its maximum take-off weight is close to 3000 kg, and the maximum level flight speed has reached 430 kilometers per hour, which is of course beneficial to a Fiat piston engine with a maximum power of 1000 horsepower!

Another Macchi aircraft manufacturing company also brought a C.100 Saeta fighter, which also used a Fiat piston engine with a maximum power of 1,000 hp, which was not much different from the Ba.65 Biot in terms of performance.

Another of the most famous Italian aircraft manufacturers is Fiat. This time came the famous Fiat CR.30 fighter. Fiat Chief Engineer Celestino Rosatelli already has ten years of experience in the design of single-engine fighters. Although he was involved in the design of monoplane fighters, he eventually returned to the familiar biplane layout. His new design - Fiat CR.30. It was developed in conjunction with the newly developed Fiat A.30RA twelve-cylinder liquid-cooled engine. The engine, designed by engineer Zerby, has a nominal power of 542 to 590 hp and an output of about 690 hp on takeoff. The A.30 is an ideal fighter engine, capable of giving the aircraft a high power-to-weight ratio, as well as low fuel consumption and reliable operation.

At the beginning of 1932, the development of the CR.30 was greatly accelerated. Both Italian officials and Fiat are eager to get the new fighter to take part in the 4th International Air Competition. On March 5, 1932, the prototype M.M. 164 was ready. Two months later. The second and third prototypes - M.M.165 and M.M.166 - are also ready for testing and demonstration. The first and third prototypes were selected for the Zurich exhibition. Fiat is ambitious. It was believed that the CR.30 was the fastest and most maneuverable fighter of its time. This was confirmed at the Zurich Exhibition in July 1932. The two prototypes won the influential Dahl-Molin Cup, leading their peers at the show and remaining in the final series presentation. CR.30 had a maximum speed of 360 km / h, took off with a full load of 1900 kg, ran a distance of 268 meters, and climbed to 10. 000 feet takes 5 minutes and 25 seconds. The most striking feature of the CR.30 is its exceptional manoeuvrability.

The American Seversky Company, which later became the Republic Aircraft Manufacturing Company, brought the first fighter under development, which was later known as the P35 fighter, which at this time was called the SEV-2XP aircraft. This is a two-seat, monoplane multirole fighter with fixed landing gear with a fairing, powered by 1 750 hp Wright R-1670 star engine. The maximum speed of this aircraft is also around 430 km/h.

The well-known Boeing Aircraft Company of the United States naturally brought the Boeing 247 passenger aircraft. It has an all-metal construction and a streamlined exterior with retractable landing gear and a lower single-wing structure. The aircraft has a cruising speed of 248 km/h, a range of 776 km, a passenger capacity of 10 people, and a capacity of 181 kg of mail. Comfortable seats on board, with toilets and a flight attendant. The Boeing 247 was successfully tested for the first time in 1933, and this was the stage when it wanted to open up the market, but Boeing also knew that two powerful opponents brought a very competitive model, that is, the JU52 transport aircraft of Junckers and the M30 transport aircraft of the Dragon Soul Ordnance Industrial Complex. Of course, the M30 transport aircraft is the biggest obstacle for Boeing to make the Boeing 247 passenger aircraft sell well, so they also want to take this opportunity to beat the M30 transport aircraft.

Not to be outdone, another well-known American aircraft manufacturer, Curtis, brought the latest Hawker 75 fighter, a fighter that is still under development, but the aircraft performs well. In November 1933, Curtis began to design a cantilevered lower wing, retractable landing gear and all-metal stress-skin structure of the fighter, which was equipped with a Pratt & Whitney R-1830-17 14-cylinder star engine, with a maximum power of 1,000 horsepower, and reached a maximum speed of 470 kilometers in a recent test flight. (To be continued.) )