Chapter 111: The Design of the IAR

Manekozi, the commander of the Royal Romanian Air Force, did not know that he had inadvertently offended a big man who could even reach out to Romania in the future, as Vincent said.

Forcibly took Vincent, the commander of the Royal Romanian Air Force, Manecozy, was very proud, and here he was the one who dominated, even if it was someone from Germany? The strong dragon is not the head snake, not to mention that in his eyes, this Vincent is not just a little designer who doesn't know the height of the sky, even if his uncle Milch is also in his eyes, he is not a strong dragon at all.

Manecozi looked at Philip and said, "Mr. Philip, I'm so sorry! Well, you guys have a great plan! However, let's take a look at the TAROM proposal and trust our jury to make the right choice. ”

Philip nodded and said, "Okay! Thank you all for your support! With that, Philip smiled and stepped off the stage and returned to his seat.

Although he did not have much hope for TAROM, Manecozi still hoped that the domestic company would be able to draw lessons from this bid, after all, the proposal of the Dragon Soul Ordnance Complex was so good that Manecozi had almost decided not to give special attention to TAROM.

With everyone watching, representatives of TAROM came to the stage. This representative is Dr. Ion Grosu, the head of the design team of the Romanian Aviation Industry Company (IAR), although he has just secretly praised the proposal of the Dragon Soul Ordnance Complex, but as a designer, he must not be afraid to face a strong opponent and present their design team's proposal to the judges, which they have spent months making, because they have already received the news, so they have plenty of time not to revise and improve the design plan.

Dr. IonGrosu was only about forty years old, wore a pair of thick glasses, and looked a bit like a university professor who walked up to the stage and hung a large picture of their design on the wall. This picture depicts a three-sided drawing of a very strange-looking transport plane, and Philip can't help but be secretly surprised after reading it.

Dr. IonGrosu gathered his thoughts and exclaimed, "Hello everyone! As the largest aviation industry company in Romania, IAR took this bid very seriously, and in order to design a better aircraft, our team worked together to design such a commercial transport aircraft. It uses two 700 hp piston engines, one in the nose and one in the tail. The advantage of this is that one pulls forward and one pushes back, and the aerodynamic efficiency will be relatively high. You can see that this aircraft has a biplane design, and you may think that the biplane seems to be behind this era, and the future aircraft design seems to be monoplane, but in fact, everyone is wrong. Biplanes have some advantages that monoplanes don't have. ”

After a pause, Dr. IonGrosu continued: "Biplanes cannot compete with monoplanes in terms of speed and acceleration due to the increased flight resistance caused by the bracket structure, but they also have their own advantages, which are maneuverability in low-speed flight, as well as excellent take-off and landing performance. Due to the unique tandem push-pull layout of the two engines, the drag is greatly reduced, which greatly compensates the weakness of the large drag of the wings. Our commercial transport aircraft has an empty weight of 7,250 kg and a maximum take-off weight of 10,000 kg, after a series of our optimized design, the aircraft has a minimum fuel mass of 1,200 kg, a maximum usable fuel mass of 1,450 kg, a basic range of 1,200 km for 1,500 kg of cargo, a maximum range of 1,600 km, a maximum level flight speed of 300 km/h, and a cruising speed of 230 km/h. According to the quality and use of the aircraft, we designed the wings with diagonal brace double girder structure, the plane shape is rectangular, the relative thickness is 12%, and the chord length is 3 meters. The vertical tail has a double elliptical wing on either side of the flat tail, which makes it easy to install the engine and propeller in the middle. The wing area is about 95 square meters, the wingspan is 25 meters, the fuselage height is 2.5 meters, the ground clearance is 1.5 meters, the vertical tail height is 2.5 meters, and the total height of the aircraft is 6.5 meters. The length of the cabin is 6.5 meters, the length of the baggage compartment is 1.5 meters, the length of the cockpit is 2.0 meters, the length of the nose engine compartment is 3 meters, the length of the tail plus the engine compartment is 8 meters, and the total length is 21 meters. ”

Seeing such a plane that was even more bizarre than the Junkers, the people in the conference room began to talk. Philip also carefully recalled that in the history of aviation, there are really some strange designs that use tandem twin engines, pull forward and push back. For example, since the end of World War I, Claude Dornier, who designed a DO335 fighter-bomber during World War II, has been interested in the field of transmitting power on the central axis, so he envisioned placing two engines on the same central axis: one engine pulling, the other propulsion. The benefits of such a system are significantly greater than those of a traditional twin-propeller layout, as it is a single-engine aircraft with the same frontal area. Without placing the engine compartment and auxiliary structures under the wings, there will be no asymmetrical thrust due to the stalling of one engine. However, it still has the problem of a propeller shaft driving the tail propeller.

Dornier's design philosophy resulted in an intimidating aircraft. A Daimler-Benz DB603 engine with an annular fairing is placed in the front of the fuselage, while the exhaust pipes are arranged behind the rear engine position. At the rear of the fuselage, a large air intake is provided to absorb the three-bladed propeller airflow behind the crosstail. Two small weapon hardpoints were added under the wings, which could carry 500 kg of bombs. Its single-seat model is one of the fastest piston engined aircraft, with a top speed of around 765 km/h, and in general, the Arrow has proven to be a well-designed aircraft without much misstepping. If it could continue to develop steadily and with sufficient resources, it would probably be possible to resolve those existing temporary problems. It may also become an important kind of fighter for the Luftwaffe.

However, due to the heavy blows of the Allies in the war, the development of Do335 was also overstretched. Development and production were delayed because the German plant was unable to provide the necessary subcontracted components such as propellers, engines and radio equipment. In the end, only a few dozen such aircraft were produced, and the war ended.

Philip secretly wondered, could it be that history has changed dramatically? This aircraft layout actually appeared in advance, but it is clear that this scheme still has many deficiencies compared to the first two transport aircraft schemes, and its structural weight alone greatly exceeds the first two, and the difference in its economy can be imagined.