Helicopter rotor of gravity fore-aft. However, it requires the expense of two large rotors rather than the more common one large main rotor and a much smaller tail rotor. The Boeing CH-47 Chinook is the most common tandem rotor helicopter. Coaxial rotors are a pair of rotors mounted one above the other on the same shaft and turning in opposite directions. The advantage of the coaxial rotor is that, in forward flight, the lift provided by the advancing halves of each rotor compensates for the retreating half of the other, eliminating one of the key effects of dissymmetry of lift: retreating blade
1994 Scotland RAF Chinook crash 1994 Scotland RAF Chinook crash The 1994 Mull of Kintyre RAF Chinook crash occurred on 2 June 1994 at about 18:00 hours when a Royal Air Force (RAF) Chinook helicopter (serial number "ZD576", callsign "F4J40") crashed on the Mull of Kintyre, Scotland. The crash, which occurred during thick foggy conditions, resulted in the deaths of all twenty-five passengers and four crew on board. Among the passengers were almost all the United Kingdom's senior Northern Ireland intelligence experts. The accident holds the distinction of being the worst peacetime disaster to have been suffered by the RAF. In 1995, an RAF board