Chapter 1704 Unmoving
"If you want to promote such a big guy, you must have a very powerful power system, right?" Roosevelt sat in his wheelchair, continued to look at the two million-ton aircraft carrier, and said to Jeffrey.
Although I am an outsider, I can definitely see that the motivation required is astronomical.
When he heard Roosevelt's words, Jeffrey seemed to show off his knowledge and explained to Roosevelt: "How much power system is needed depends on the design indicators we give to the ship. Because when the ship sails at high speed, the resistance and speed are in the power of the third power. For example, if our battleship is designed to have a speed of thirty knots and 200,000 horsepower, then the speed reaches thirty-five knots, and the power required will reach a terrible 400,000 horsepower."
This is the terrible power of the third power. If the speed is higher, it will become the fourth power, which will be even more abnormal.
Another meaning of this sentence is that if the design speed is reduced, the power system required can be greatly reduced. In later generations, the power system used by oil tankers worth hundreds of thousands of tons is almost the same as the power system of frigates worth thousands of tons. You are not afraid of slowness, as long as you can move, at most you can shake a few more days at sea, and you won’t be in a hurry.
The Navy is not too ambitious. If you give such a big guy a speed that matches the fleet, you will definitely not be able to create it. Now, only ten knots of speed is required, and after your own calculations, there is no problem.
Hearing Jeffrey's words, Roosevelt said: "In other words, our super aircraft carrier will be as slow as a snail?"
This metaphor embarrassed the people present, and Jeffrey hurried over to smooth things over: "President, it seems that snails can't climb in the sea, right? To compare, it is also comparable to turtles. Don't look at the turtles being very slow on land, but in the water, they are also quite agile."
As he said that, Jeffrey made a turtle swimming move.
Roosevelt laughed, and the others laughed, and amid the laughter, Jeffrey issued an order to test the voyage.
If it is an ordinary ship, the leaders of these countries can be allowed to board the ship and go out for trial sailing with the ship. However, this ice aircraft carrier is the first time in history. No one can guarantee how reliable the ship is. What if it breaks when it goes out and runs, and throws Roosevelt and others into the water?
So, Roosevelt did not propose to go up, nor did the others. Everyone was on land together, watching the action of the giant.
"Start the engine." Jeffrey shouted loudly. At this time, the ship had not been connected to the radio, and there was not even the superstructure, and there was only one hull. So Jeffrey could only shout at a loudspeaker.
Hearing his voice, the people who were trying to sail on the ship began to get busy.
Start the fuel pump, inject fuel, turn on the circuit, and then ignite!
"Buzz, buzz." A stream of black smoke emerged from the exhaust pipe, and a 2,000-horsepower star-type air-cooled engine started.
One, two, when all 26 engines were activated, the roar sounded throughout the lake. The birds in the distance were disturbed by this sound. They flapped their wings and flew away from the lake. While flying, they turned their heads to look at this huge creature. What exactly is it? It's so terrible?
"Mr. President, our aircraft carrier is about to start." Jeffrey said to Roosevelt proudly.
The aircraft carrier is about to start!
After the engine was started, it took a minute to run at low speed and checked that the engine was working well. Then, the operator pushed all the throttle levers of the engine to full speed.
In an instant, the roar of the engine became even louder. The high-speed engine drove the propeller behind to rotate through the reducer. The propeller was immersed in the water. At this time, it was rotating violently, constantly stirring the sea water. You could see streams of water forming around the aircraft carrier.
26 engines and 26 propellers form 26 water flows, flowing backwards on both sides of the aircraft carrier, and the aircraft carrier will be subjected to the forward impact of this water flow and will move forward.
Jeffrey looked at the aircraft carrier with anticipation. Time passed by in seconds. Soon, the hope on his face turned into doubt and strange.
The aircraft carrier remains motionless.
How is this possible?
Even if the power is small, the aircraft carrier can still move as long as it acts continuously! This is determined by the basic momentum theorem, but now, the aircraft carrier shows no sign of moving at all.
Jeffrey turned his head and looked at Roosevelt. At this time, Roosevelt's face was full of disappointment.
If this aircraft carrier cannot move, what's the use? Roosevelt came with hope, but he did not see the result he wanted.
Just this thing can still go to the battlefield?
"Mr. President, please wait. Something must have happened." Jeffrey said, and hurriedly rushed towards the ice aircraft carrier.
He took two steps at once and ran to the docking place in one breath. Looking at the water flow below, he saw engines driving propellers, stirring the lake water hard. Everything was normal, but the ship just stopped moving.
what is going on?
At the dock, even a tow boat can drag a cargo ship that is much larger than it. This kind of immobility will occur unless the power is less than the resistance.
Thinking of this, Jeffrey squatted down, quickly took out the thick information in his briefcase, turned to the power system, then took out the pencil, and quickly recalculated it.
The roar of the engine continued, but the ship was still motionless. In this way, half an hour passed, and the people on the shore were impatient. Behind Jeffrey was the scrapped manuscript paper, and more than a dozen pieces were thrown. Finally, Jeffrey stood up with a sad face.
"We miscalculated a decimal point," said Jeffrey. "We miscalculated the underwater area of the aircraft carrier and miscalculated the resistance, so now our power system cannot drive the ship."
There was still too few manpower, and all of them were calculated manually, and the construction period was very fast. Without review, Jeffrey couldn't believe that this situation had happened.
Chapter completed!