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  2. HM-15 - Wikipedia

    en.wikipedia.org/wiki/HM-15

    HM-15 delivers aid to Sabang on the island of Sumatra following the 2004 Indian Ocean earthquake / Tsunami. HM-15 aircraft ferry water from the offshore flotilla, 15 January in support of relief operation after the 2010 Haiti earthquake. HM-15 is the first U.S. Navy squadron to combine and consolidate training requirements between the USN and ...

  3. Head injury criterion - Wikipedia

    en.wikipedia.org/wiki/Head_injury_criterion

    A HIC-15 (meaning a measure of impact over 15 milliseconds) of 700 is estimated to represent a 5 percent risk of a severe injury (Mertz et al., 1997). A "severe" injury is one with a score of 4+ on the Abbreviated Injury Scale (AIS) [6] Data for specific vehicles can be found on various automotive review websites.

  4. Crashworthiness - Wikipedia

    en.wikipedia.org/wiki/Crashworthiness

    Different criteria are used to figure out how safe a structure is in a crash, depending on the type of impact and the vehicle involved. Crashworthiness may be assessed either prospectively, using computer models (e.g., RADIOSS , LS-DYNA , PAM-CRASH , MSC Dytran , MADYMO ) or experiments, or retrospectively, by analyzing crash outcomes.

  5. V speeds - Wikipedia

    en.wikipedia.org/wiki/V_speeds

    Speed at which exceeding the limit load factor may cause permanent deformation of the aircraft structure. [7] [8] [9] [24] V O: Maximum operating maneuvering speed. [25] V R: Rotation speed. The speed at which the pilot begins to apply control inputs to cause the aircraft nose to pitch up, after which it will leave the ground. [7] [26] [Note 1 ...

  6. Crash test - Wikipedia

    en.wikipedia.org/wiki/Crash_test

    A crash test of the Honda Ridgeline by the NHTSA Frontal small-overlap crash test of a 2012 Honda Odyssey 2018 Dodge Grand Caravan being struck by a mobile deformable barrier at 62 km/h 2016 Honda Fit striking a wall head-on at 56 km/h Driver-side oblique crash test of a 2017 Honda Ridgeline Jeep Liberty undergoing routine impact testing at Chrysler's Proving Grounds NHTSA research crash test ...

  7. Helicopter height–velocity diagram - Wikipedia

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

    The H/V curve also contains a take-off profile, indicating how a pilot can start from 0 height and 0 speed, and safely traverse to cruise. At low heights with low airspeed, such as a hover taxi, the pilot can simply cushion the landing with collective by converting rotational inertia into lift. Conversely, a complete power loss, and resultant ...

  8. List of accidents and incidents involving military aircraft ...

    en.wikipedia.org/wiki/List_of_accidents_and...

    The first crash involving a Bell-Boeing Osprey occurs when the fifth MV-22, BuNo 163915, three minutes into its maiden flight at a Boeing flight test facility at Wilmington, Delaware, suffers problems with the gyros due to incorrect wiring in the flight-control system [55] and crashes into the ground from a 15-foot (4.6 metre) hover during an ...

  9. Crumple zone - Wikipedia

    en.wikipedia.org/wiki/Crumple_zone

    A crash test illustrates how a crumple zone absorbs energy from an impact. Road Maintenance Truck Impact Attenuator, Auckland, New Zealand Extent of the crumple zones (blue) and the driver's safety cell (red) of an E217 series train The crumple zone on the front of these cars absorbed the impact of an offset head-on collision.