Not long after.
"Tap, tap!"
Huge sounds echoed inside the building, making external noise reduction quite a challenge. The only option was internal noise reduction.
Tang Qing didn't pay it much mind.
After all.
Since it's not for military use, concealment isn't a major concern; meeting technical requirements is the key, so the main focus was on internal insulation.
It worked well.
Like a passenger plane.
Inside the cockpit, it felt like being inside a car—quite comfortable. However, fuselage soundproofing tests are not conducted here, nor are they today's project.
"Power at fifteen percent, stable."
"..."
"Power at twenty percent, stable."
"..."
"Power at fifty percent, stable."
"..."
Data kept pouring in.
Soon.
At maximum power, the whole building turned into a whirlwind. The four propellers provided lift of more than a hundred tons—imagine the power.
People could barely stand steady.
A minute passed.
...
Five minutes.
...
Ten minutes.
...
