My Items Have an Upgrade Panel

  Chapter 55 Variable Bypass Ratio

   "What the **** is this plane?"

   Tang Rui's eyes widened, looking at the screen in a daze.

  He has never seen this plane.

   But he is sure that this thing must be the latest supersonic stealth reconnaissance aircraft of Yingjiang.

   "This appearance is different from the revealed Goddess of Aurora."

  The drone is chasing after.

  Using the optical system, the aerodynamic shape and body structure of the entire supersonic stealth reconnaissance aircraft were photographed.

   Tang Rui looked at the 3D model on the screen, and his brain was calculating rapidly.

   "Integrated forging forming technology."

   "Scramjet."

   "Long fuselage short wings."

  He thought for a long time according to the condition of the airframe, and suddenly thought of a verification machine for Eagle Sauce.

  HTV-3X Black Swift.

   It is said that this verification machine is a technical reserve and technical verification for the development of SR-72.

  In the outside world, this verification machine is not well-known. Compared with the goddess of dawn, it is far behind.

   But who would have thought.

   This thing has already started a secret test flight.

   "Fuck!"

   Just as Tang Rui was thinking, the dog started to speed up.

   He glanced at the map.

   It was found that it had returned to the domestic airspace.

   No wonder it has to speed up. If it flies slower, it is easy to be shot down.

  Tang Rui also pushed the throttle, allowing the drone to catch up closely.

   But soon he found out.

  The drone couldn't catch up.

   Even if he has pushed the speed to the maximum, reaching Mach 4.2.

  But compared with the supersonic stealth reconnaissance aircraft that reaches Mach 6 and above, it is still too far behind.

   Less than five minutes.

  The reconnaissance plane completely disappeared from Tang Rui's sight.

  Radar cannot scan.

   Optical system tracking, only a blurred point of light can be seen.

  Tang Rui pulled down the throttle valve, exited the afterburner state, and let the drone enter the subsonic cruise state.

   Very upset.

   It's not that he doesn't work hard.

   Mainly engine issues.

  The turbojet engine and the scramjet engine are not on the same level.

   The engine must be upgraded.

  Tang Rui has decided that when he comes back this time, he will strengthen the drone's engine.

   Three in the morning.

  He forced himself to control the drone to land.

   Run to the drone.

   Look at the system panel.

  The experience value of the drone has long been overflowing.

  【Item: Perfect Reconnaissance Drone +4】

  【Experience: 87363/26000 (upgradeable)】

  【Enhancement: airframe, avionics, engine, energy】

  【Feature: High-precision scanning】

  【Source point: 5.64 (can be strengthened)】

   Tang Rui didn't say anything else, just click to upgrade.

  A blue light flashed.

  The drone has been upgraded.

  However, in this upgrade, the body of the drone has not changed, but one more feature has been added.

  Strong stealth performance.

  Tang Rui looked at the experience column and found that he could continue to upgrade.

   Click Upgrade.

   Another blue gleam flashed.

  The drone has been upgraded.

  【Item: High-performance Stealth Unmanned Reconnaissance Aircraft +6】

  【Experience: 3363/? (not upgradeable)]

  【Enhancement: airframe, avionics, engine, energy】

  【Features: high-precision scanning, strong stealth performance, weak radiation signal】

  【Source point: 5.64 (can be strengthened)】

   Upgraded two levels in a row.

   prefixes and terms have changed.

  Add two features.

   And enter the non-upgradeable state again.

  Looking at the brand new system panel of the drone, Tang Rui fell into deep thought.

   Follow previous upgrade experience.

   If you want to upgrade the drone to level 7, you need to strengthen the equipment.

   And all the equipment can only be upgraded after strengthening it again.

  A drone is not a fascia gun.

  There are too many devices and systems that make up a drone.

  If it is fully strengthened, it is estimated that dozens or even hundreds of source points are needed.

   One thought here.

  He was a little speechless.

  This requires too many sources.

   "Strengthen the engine first and see the situation."

  Tang Rui decided not to care so much and strengthen the engine first.

   Select Enhanced Engine.

   Instantly.

   Several options appear.

  Structural strengthening, material strengthening, turbine strengthening, combustion chamber strengthening, compressor strengthening and nozzle strengthening.

   Among them, structural strengthening and material strengthening both require 5 source points, while the rest of the strengthening only requires 2 source points.

  Tang Rui thought about it, and chose to strengthen the structure.

  In fact, material strengthening is also very important.

   But the problem is, even if he strengthens the material, he still needs to start from scratch.

   Whether it can be done, it is hard to say.

  The structure is different.

  After strengthening, he can scan it three-dimensionally and use it directly.

   So for him.

  The benefit of strengthening the structure is relatively high.

   Shua.

   With a flash of light, the strengthening is complete.

  The structure of the engine is strengthened, which cannot be seen from the outside.

  He towed the drone into his car and drove home.

  By the time I got home, it was almost four o'clock.

  The original sleepiness has disappeared.

   "Staying up late is harmful to your body, let's stay up all night."

   After muttering something.

  He dragged the drone into the basement.

   "Let's do it!"

  Put the drone on the workbench, pick up the tools, and start disassembling the engine.

  He wants to know.

  What is the situation with the enhanced engine structure?

   Half an hour later.

  One engine was disassembled by him.

  Tang Rui took the 3D laser scanning device and began to scan the engine in all directions.

  On the computer screen next to him, as he scanned, the three-dimensional model of the engine slowly appeared.

  Wait for him to finish scanning.

  Took the computer and looked at the engine structure on it.

  I found a problem at the first time.

  The current overall structure of the engine is too complex.

   "This is a variable bypass ratio structure combining single duct (turbojet) and double duct (turbofan)."

  Tang Rui took a closer look and found that the overall structure of the engine had changed a lot.

   Especially the variable bypass ratio.

   This thing can also be regarded as a kind of black technology with a slanted sword.

  What is bypass ratio?

   Simply put, it is the ratio of the air flow of the engine outer duct to the inner duct.

  The bypass ratio of current aircraft engines is fixed.

  For example, the F-22 engine has a bypass ratio of 0.29.

  As for our J-10 and J-15, the bypass ratio is in the range of 0.6-0.8, and the exact number is unknown.

   So here comes the problem.

   Is the bypass ratio better to be bigger or smaller?

  The answer depends on the situation.

  For aircraft that do not require supersonic cruise, a larger bypass ratio is better.

  For aircraft that need supersonic cruise, duct is better than smaller.

  This is just an approximate meaning.

   Ordinary people can understand this, and that’s it.

  So what about the black technology of variable bypass ratio?

   It means that when cruising at subsonic speed, the engine is in a state of high bypass ratio, and extra air enters the combustion chamber to make the fuel burn more fully, increase thrust and reduce fuel consumption at the same time.

  When entering the supersonic mode, the valve is closed, and only a small part of air enters the outer duct, which is responsible for cooling and afterburner.

  Such a change can increase the thrust-to-weight ratio of the engine and be more fuel-efficient.

  (end of this chapter)