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  2. Helicopter height–velocity diagram - Wikipedia

    en.wikipedia.org/wiki/Helicopter_height...

    The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."

  3. Lowest safe altitude - Wikipedia

    en.wikipedia.org/wiki/Lowest_safe_altitude

    Minimum obstacle clearance altitude (MOCA), an altitude which provides a predetermined vertical clearance from known obstacles within a predetermined corridor along the specified flight segment. For a published procedure, the greater of these two altitudes is the altitude which must be adhered to during that segment, and is called the Minimum ...

  4. Human-powered helicopter - Wikipedia

    en.wikipedia.org/wiki/Human-powered_helicopter

    The American Helicopter Society (AHS) International's Igor I. Sikorsky Human Powered Helicopter Competition was a competition to achieve the first human-powered helicopter flight to reach an altitude of 3 m (10 ft) during a flight lasting at least 60 seconds, while remaining within a 10 m (32.8 ft) x 10 m (32.8 ft) square, and complying with other competition requirements. [1]

  5. Nap-of-the-earth - Wikipedia

    en.wikipedia.org/wiki/Nap-of-the-earth

    Helicopters are capable of flying with no more than a few feet of clearance below the helicopter's skids or wheels. Fast jets are more constrained and at a typical low-flying speed of 450 knots (830 km/h), 200 feet (61 m) is not unusual and 50 feet (15 m) is possible in relatively flat terrain.

  6. Data Suggests Another Army Helicopter Flew Above D.C ... - AOL

    www.aol.com/data-suggests-another-army...

    But just like in last week’s catastrophe, the data from Jan. 18 helicopter ― which used the same call sign, PAT25, as the one in the Jan. 29 crash ― likely doesn’t show the entire picture ...

  7. Sikorsky CH-54 Tarhe - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_CH-54_Tarhe

    As of 2014, it continues to hold the helicopter record for highest altitude in level flight at 11,000 m (36,000 ft), which it set in 1971, [5] as well at the fastest climb to 3,000, [6] 6,000, [7] and 9,000 [8] m (10,000, 20,000, and 30,000 ft). On 20 April 1965, a CH-54A equipped with a people pod lifted 90 people, comprising its crew of three ...

  8. Bell Boeing V-22 Osprey - Wikipedia

    en.wikipedia.org/wiki/Bell_Boeing_V-22_Osprey

    This is an accepted version of this page This is the latest accepted revision, reviewed on 6 February 2025. Military transport tiltrotor "V-22" redirects here. For other uses, see V22 (disambiguation). V-22 Osprey A MV-22 being used during a MAGTF demonstration during the 2014 Miramar Air Show General information Type Tiltrotor military transport aircraft National origin United States ...

  9. High-altitude military parachuting - Wikipedia

    en.wikipedia.org/wiki/High-altitude_military...

    United States Air Force Pararescuemen jump at half the height of a typical HALO/HAHO insertion 2eme REP Legionnaires HALO jump from a C-160.. High-altitude military parachuting, or military free fall (MFF), is a method of delivering military personnel, military equipment, and other military supplies from a transport aircraft at a high altitude via free-fall parachute insertion.