Roosevelt was a smart man. He immediately put on the lead and wrote to Stalin, and took the initiative to invite Stalin to send a diplomat and a general to Washington to discuss the combat plan.

At the same time, Roosevelt also pointed out in the letter:

"We already have a preliminary plan, which is intended to attract 40 German divisions. So we intend to invest 48 divisions, including nine armored divisions, and the air force supporting the offensive needs 5,800 fighter jets and large numbers of warships and transport."

Finally, Roosevelt also stated: "Unlike other people's views, my view is that we must first defeat Hitler. Therefore, we are ready to do everything we can to reduce the burden on the Soviet Union's war on Hitler as quickly as possible!"

The letter was undoubtedly a timely help for Stalin, so he immediately sent diplomats to contact Roosevelt.

The United States' international status and influence have been steadily improved because of its active participation in the war, while the United Kingdom has declined because it only cares about the immediate and domestic interests. Even if it were not planned to rely on the United Kingdom as a base, the United States and the Soviet Union may have left Britain aside, but Churchill did not realize this.

Of course, Qin Chuan knew nothing about the open and secret struggles between the three giants of Britain, the United States and the Soviet Union. What he is doing now is to improve some of the problems of helicopters with Conrad.

"We found that during the flight and the rope landing, we basically didn't use weapons and equipment!" Conrad said: "So this is definitely something that needs improvement!"

Conrad said that half of the machine guns of Junker transport aircraft were installed on the back of the aircraft, and the two were mounted on the wings, but the aiming system was all aimed at enemy aircraft... that is, they were used for self-defense when intercepted by enemy aircraft.

At this time, on the helicopter, these self-defense targeting in the air are completely unnecessary, because it can basically be said to be a kind of equipment targeting the ground.

"It's right!" Qin Chuan said: "We need to change the aiming system to be opposite to the ground, and the armor thickness must be increased, and the machine gun must also be changed to a larger caliber..."

"Major!" Conrad interrupted Qin Chuan and said, "I haven't considered these, but have you ever thought... the helicopter has limited lift. If we do such a modification, it can only carry weapons and armor and cannot transport it!"

"Of course I've considered it, Colonel!" Qin Chuan replied: "But... why don't we separate them?"

"What?" Conrad didn't understand what Qin Chuan meant.

"Just like our Air Force has aircraft dedicated to combat, bombing, and transportation!" Qin Chuan said: "Why can't helicopters have aircraft dedicated to combat?"

Conrad couldn't help but say "Oh" when he heard this, and then slapped his head in agreement: "That's right, Major. I'm so stupid. In this way, all the problems will be solved. We can design helicopters specifically for combat, transportation, and even for rope-landing. This will greatly improve their respective efficiency. For example, combat helicopters can safely pile weapons on top, such as machine cannons!"

"If you want, you can also equip it with rocket launchers!" Qin Chuan added.

"Rocket Launch?!" Conrad stared at Qin Chuan blankly.

"Of course!" Qin Chuan replied: "Just like the 'Stalin Organ', its advantage is that it has no recoil, isn't it? This advantage is very useful for helicopters!"

(Note: The Germans call the "Katyusha" rocket launcher "Stalin Organ")

"That's right, major!" Qin Chuan's statement excited Conrad: "God, rocket launcher... We install shells below and fire at the target after they take off! This is a genius idea. Major, we can even use it to attack enemy artillery, tank groups, or transportation teams, etc. More importantly, it can fly away after it is finished, and the speed is much faster than the Soviets using cars to make chassis!"

This also shows Conrad's qualities in military equipment: the "Katyusha" rocket launcher itself can be said to be very fragile and even said that it has no defense. However, the reason why it can exert such great power on the battlefield is that it runs fast and fires 16 rockets in 7 to 10 seconds at a time, and then transfers immediately... During this period, no equipment has such a quick reaction ability to counterattack it within 7 to 10 seconds, so there is always no way to deal with it unless the reconnaissance aircraft in the air discovers it and prepares it early.

If we start from this concept... the helicopter is also very fragile, but if it is installed with a rocket launcher with a range of 8 kilometers or even more, it is almost invincible because it can fly low altitude and then suddenly pull up and shoot a row of rockets towards the target, and then quickly reduce the altitude and transfer.

Compared with the "Katyusha" rocket launcher, it has the benefits of fast speed, strong maneuverability, longer range, and not limited by terrain.

The further I think about Conrad the more excited I feel.

"God!" said Conrad, "Why have we never realized the benefits of this equipment? We just use it as artillery watch aircraft. It's so stupid! It's so stupid!"

"Do we have rocket launchers?" Qin Chuan asked.

"Yes, of course!" Conrad replied.

In fact, Qin Chuan knew that the Germans' research on rocket launchers was even earlier than that of the Soviets. They developed rocket-powered weapons as early as 1929, which was 6 to 10 years earlier than other countries.

But unfortunately, the Germans have high requirements for accuracy, while the accuracy of rocket launchers is very poor, so this equipment has never been paid attention to by the military. The German troops are equipped with rocket launchers in a small number, mostly for firing smoke bombs... Fired smoke bombs do not require precise strikes, they only need to be thrown near the target.

This is completely different from the Soviet Union's research and development direction. The Soviets did not consider their accuracy, but instead sought a large number of shells to cover the target at a short time and achieve their goal.

Facts have proved that the Soviets' tactical thinking of using rocket launchers was correct... The Germans gradually realized this by the "Katyusha" rocket launchers on the battlefield.

So, the Germans also had their own rocket launcher.

Its production is very simple, and it only needs to be used as a smoke emitter. Then it is soon moved to a half-track truck and turned into a self-propelled rocket launcher... This is the 42 150MM self-propelled rocket launcher.

What Qin Chuan has to do now is to move these rocket launchers to the helicopter and put them on the battlefield.
Chapter completed!