Chapter 1220 (1/2)

Flett's face changed. In the whole German military development, head of state Chirac played an irreplaceable role. The direction he pointed out was finally proved to be completely correct.

As a result, many military industry experts were praising head of state Chirac. He was omnipotent and played an irreplaceable role in all fields. Many times, the problems they encountered could not be solved. As a result, head of state Chirac pointed out at once. Even the most professional people admired head of state Chirac very much.

Now, the head of state of Chirac actually said that there were fatal defects in this helicopter, which must be there. So, is the helicopter he spent more than ten years to develop going to fail?

This made Flett's careful liver tremble. He didn't even have confidence in the next performance of his helicopter. He carefully said to Shrek, ”what's the fatal defect of this plane, head of Shrek?”

”The reverse torque cannot be effectively overcome by this helicopter, which will lead to the aircraft's inability to maintain excellent balance performance in flight. As long as the external meteorological conditions exceed, the aircraft's balance will be damaged and there will be a risk of crash at any time.” Said Shrek.

This sentence immediately surprised Flett. Sure enough, as the legend goes, head of state Chirac can always point out the problem of his plane at once!

In the process of helicopter development, this reverse torque has always been shrouded in the hearts of various designers.

When the propeller is rotating, it can be imagined that a wing is rotating and the rest is the fuselage. Then, why not the wing is stationary and the fuselage is rotating?

The forces act on each other. When the propeller rotates, the fuselage also wants to rotate with it（ This is best illustrated by the model aircraft. If you grasp the propeller of the model aircraft and don't let it rotate, the aircraft will rotate in the opposite direction driven by the engine.)

In fixed wing aircraft, this is an inevitable problem, but there are larger wings behind the fixed wing aircraft, and this torque is offset in the fuselage. Even so, when the aircraft takes off and lands, if you don't pay attention, it may be taken into the ditch by this problem, and the fuselage will turn over inexplicably, resulting in a big top.

For fixed wing aircraft, this problem is not particularly serious, but on helicopters, this problem is quite terrible.

In order to directly lift the helicopter, the lift generated by the propeller at the top must be greater than the gravity. In this way, the propeller of the propeller aircraft is very large and the torque generated is also very strong.

How to overcome this torque? Look at Flett's helicopter now. Its rear fuselage has four tall vertical tails, which is much larger than the vertical tail area of ordinary aircraft. Flett increases the stability of heading in this way, but this is only a solution to the symptoms rather than the root cause.

Flett's solution can't solve the problem.

At this time, the helicopter was still flying, but Flett felt the sweat on his forehead whizzing outward. Head of state Chirac said that there was a serious defect. Will this helicopter stop production because of this defect?

”Then, head of state Chirac, how can we overcome this defect?” ”We've really been troubled by this problem for a long time,” Flett asked cautiously