
Hezârfen Ahmed Çelebi is a Turkish said to be one of the first persons to attempt to fly with wings. He was inspired by another Turk from the 10th century named İsmail Cevheri. Ahmed Celebi lived in the 17th-century Ottoman Empire and can be mentioned as one of the early flight experimenters or "jumpers".
He flew from the very top of the Galata Tower in Istanbul and landed in the Doğancılar square in Üsküdar, with the help of the south-west wind.
The 17th century writings of Evliyâ Çelebi relate this story of Hezârfen Ahmed Çelebi..
Cassini–Huygens is a joint NASA/ESA/ASI robotic spacecraft mission currently studying the planet Saturn and its many natural satellites.
Cassini has seven primary objectives:
1. Determine the three-dimensional structure and dynamic behavior of the rings of Saturn
2. Determine the composition of the satellite surfaces and the geological history of each object
3. Determine the nature and origin of the dark material on Iapetus's leading hemisphere
4. Measure the three-dimensional structure and dynamic behavior of the magnetosphere
5. Study the dynamic behavior of Saturn's atmosphere at cloud level
6. Study the time variability of Titan's clouds and hazes
7. Characterize Titan's surface on a regional scale
The DG-100 of 1973 is the first sailplane (glider) type manufactured by Glaser-Dirks. Built of glass-reinforced plastic (fiberglass), the first model had an all-flying tailplane and a two-piece canopy (movable and fixed parts). The original DG-100 was superseded by the DG-100G, DG-101 and DG-101G. Most models came equipment with water ballast bags in the wings.
The DG-101 and DG-101G had improvements such as a single piece front hinged canopy, improved crash resistant cockpit and a conventional tailplane (with fixed horizontal stabilizer and moveable elevator). There was also a club version of this sailplane with fixed gear. All models featured top surface only air brakes.
Although DG-100/101 series of gliders was designed in the seventies, they are still popular in the Club class and remains competitive in Sports class contests (which are handicapped).
The wing's control surface hookups are non-automatic and utilize L'Hotellier fittings. These fittings must be secured by a secondary means such as a safety pin, safety wire, Uerling Sleeves or Wedekind Sleeves (See this web page for more details on this subject).

Centurion is an evolutionary series of solar- and fuel cell system-powered unmanned aircraft. It was built to develop the technologies that would allow long-term, high-altitude aircraft to serve as "atmospheric satellites", to perform atmospheric research tasks as well as serve as communications platforms.
Centurion, originally built for the 100,000 feet (30,000 m) altitude on solar power milestone specified by the ERAST project, was the third generation aircraft in Pathfinder series. The ERAST program managers had determined that an aircraft based on the Pathfinder/Pathfinder Plus concept would be the lowest risk approach of achieving the altitude goal.

The Saab JAS 39 Gripen is a lightweight fighter aircraft manufactured by the Swedish aerospace company Saab. Gripen International acts as a prime contracting organisation and is responsible for marketing, selling and supporting the Gripen fighter around the world.The Gripen was designed for performance, flexibility, effectiveness and survivability in air combat. The designation JAS stands for Jakt (Air-to-Air), Attack (Air-to-Surface), and Spaning (Reconnaissance), indicating that the Gripen is a multirole or swingrole fighter aircraft that can fulfill each mission type.