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A balloon helicopter is a flying toy consisting of a latex toy balloon and a plastic propeller, derived from the simple balloon rocket. The most important feature is the hollow propeller hub which directs air into a passage in each propeller blade. The air passages channel air to the blade tips such that air escapes in a fine jet tangentially.
He had all necessary licenses and permissions, carried an oxygen supply, ADS-B transponder, and remote control of ballast and balloon-popping squibs. He released himself from the balloons and free-fell until his parachute automatically opened at 7,000 feet (2,100 m). [33] The balloon was then remotely piloted by the ground team to a safe ...
The Boeing–Sikorsky RAH-66 Comanche is an American stealth armed reconnaissance and attack helicopter designed for the United States Army.Following decades of study and development, the RAH-66 program was cancelled in 2004 before mass production began, by which point nearly US$7 billion had been spent on the program.
Kytoons are balloon kites that are shaped and tethered to obtain kiting deflections, and can be lighter-than-air, neutrally buoyant, or heavier-than air. Kites have been developed for commercial applications using kite control systems , including the airborne wind energy systems of high altitude wind power .
A 1998 attempt at an around-the-world balloon flight by Fossett, Richard Branson and Per Lindstrand ends in the Pacific Ocean on December 25. Fossett tried six times over seven years for the first solo balloon circumnavigation. His fifth attempt cost him $1.25 million of his own money; his sixth and successful attempt was commercially sponsored ...
A trailing edge tone occurs when an exterior flow passes over a trailing edge. There is a whistle that is a combination of an edge tone and a trailing-edge tone and might be called a wake-edge tone. It occurs in rotating circular saws under idling conditions and may be called the circular-saw whistle. Under load conditions, blade vibration ...
A captive helicopter is a helicopter which is tethered to the ground with a rope, as with a captive balloon. Captive helicopters can be used for the same purposes as captive balloons. A primary advantage of captive helicopters is that they can be more accurately steered than captive balloons or kites in order to compensate for the influence of ...
Piasecki H-21 cockpit. Piasecki Helicopter designed and successfully sold to the United States Navy a series of tandem rotor helicopters, starting with the HRP-1 of 1944. The HRP-1 was nicknamed the "flying banana" because of the upward angle of the aft fuselage, which ensured that the large rotors could not strike the fuselage in any flight attitude.
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