College of Aviation Technology

Happy Swiss National Day 🇨🇭🎉

This snapshot of four Swiss International Air Lines planes at our Dock E, with their striking Swiss crosses on the tail fins, is a perfect way to celebrate Swiss National Day.

মাহফুজ নটরডেম কলেজ থেকে এইচএসসিতে জিপিএ পাঁচ পেয়ে কলেজ অব এভিয়েশন টেকনোলজিতে অ্যারোনটিকাল ইঞ্জিনিয়ারিংয়ে ভর্তি হন । সফলভাবে কলেজ অব এভিয়েশন টেকনোলজি থেকে অ্যারোনটিকাল ইঞ্জিনিয়ারিং পাস করে তিনি এখন মার্কিন যুক্তরাষ্ট্রের কানসাসে ন্যাশনাল ইনস্টিটিউট ফর এভিয়েশন রিসার্চ সেন্টারে কাজ করছেন ।

Earlier this week, our telescopes spotted 3I/ATLAS, a comet that originated from interstellar space.

This comet poses no threat to Earth: it'll come no closer than 150 million miles (240 million km) on its tour through the solar system. (That's about one and a half times the distance between Earth and the Sun.) It *is*, however, a rare opportunity to study a unique object, and should remain visible to ground-based telescopes until it passes too close to the Sun to observe in September.

Get the details: https://go.nasa.gov/44mctEg

Dihedral & Anhedral Wings !

Aircraft wings aren’t always flat. They’re often angled upward (dihedral) or downward (anhedral) from the fuselage to influence roll stability—crucial for safe and efficient flight.

How it works:

* Dihedral angle (wings tilted upward): Improves lateral stability, especially in commercial and general aviation aircraft. When the aircraft rolls due to turbulence, dihedral helps it self-correct back to level flight.

* Anhedral angle (wings tilted downward): Reduces stability but increases maneuverability. Used in high-performance fighter jets where rapid rolling is necessary.

Key focus points:
* Dihedral = stability (e.g., Boeing 737, Airbus A320)
* Anhedral = agility (e.g., Sukhoi Su-27, F-4 Phantom)
* Wing angle is carefully chosen based on the aircraft’s role and flight envelope
* Some aircraft use a combination—dihedral on outer wings, anhedral on inner wings (e.g., C-5 Galaxy)

Did You Know?
The Concorde had an anhedral wing design—combined with its delta shape—to maintain control at supersonic speeds.

Poll:
Which do you find more fascinating in design?
* Dihedral: graceful and stable
* Anhedral: aggressive and agile
* Depends on the aircraft’s purpose

Open-ended question:
If you were designing a new aircraft, which wing angle would you prioritize—and why?

Fun or interesting fact:
Some gliders use extreme dihedral angles for maximum lateral stability, allowing them to soar hands-off in thermals for long durations.

What better view than red, white and blue? Happy Independence Day from American 🇺🇸

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