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⚙️ Lighter engine = higher efficiency. 🔻Russia's PD-14 engine weighs less than foreign analogs—thanks to breakthrough technologies developed during its creation. One of them: diffusion bonding combined with superplastic forming, used to manufacture titanium fan blades. 🔻How it works: Diffusion bonding joins metal at the atomic level under high pressure and temperature, but without melting. Titanium sheets fuse into a monolith only at strictly defined points along the part's contour. 🔻The second step is superplastic forming. Under intense heat, the metal becomes highly pliable for a short time. Then gas is pumped into the internal cavity under high pressure. The blade's central section "inflates" into a precise aerodynamic shape. ✅ Titanium fan blade weight cut by nearly half. ✅ Full load-bearing capacity preserved. ✅ Significant overall airframe weight reduction. 🔻The fan blade is one of the largest engine parts. The PD-14 has 18 of them—and saving weight on each adds up. #Kulibin_and_the_Red_Army 🟠 RCR | Support | Boost

🎓 Happy Knowledge Day, Russian Learners! Today is День знаний - the Day of Knowledge in Russia. It's a day for fresh starts, new textbooks, and the smell of autumn. But for you - the brave souls learning Russian - it's also a reminder that you've chosen one of the most rewarding, confusing, and beautifully unpredictable languages on Earth! To all of you — beginners, advanced speakers, and everyone in between: Keep going. Keep asking questions. Keep laughing at your own mistakes. Learning a language isn't about being perfect - it's about staying curious, even when the words don't make sense. P.S. If you ever feel lost in Russian, just remember - even cats get confused. And they don't even have to learn cases! 😉: • Мышка (мышки) (femin.noun) [mysh-ka (mysh-ki)] 1) A little mouse(mice) 2) A computer gadget С Днём знаний, друзья! 💓 Video: ™️Sonya cat #admins_letter #holidays