static rollover

static rollover

static rolloverclick for a larger image
In situation A, the center of gravity is inside the track of the skids and the helicopter is safe. B is a marginal situation. In case C, the skids are narrow and the center of gravity is outside the track of the skids resulting in the helicopter rolling over on to one side.
A phenomenon experienced by helicopters when landing on sloping or uneven ground. The helicopter will not roll over as long as the center of gravity is within the skids. However, if it moves out either because of a sharp gradient or a change of weight on board (as in getting in or out of the helicopter on the sloping side), the helicopter is likely to roll over.
References in periodicals archive ?
The parameter known as the Static Rollover Threshold (SRT) is defined as the maximum lateral acceleration (expressed in g's) in a stationary regime supported by the body before rollover occurs, and is highly influenced by body geometry which decreases with increasing height of the CG for a body of equal width (Wormley et al., 2002).
where: [SRT.sub.geom] = static rollover threshold geometric; b = width of the base; and h = height of the center of gravity.
Body width and height were employed in determining the [SRT.sub.geom], and the values were compared between them and with the range of variation of the static rollover threshold proposed to verify the stability of vehicles, which relates the lateral stability with height of the CG.
castaneum compared with the Static Rollover Threshold model [SRT.sub.geom] proposed for vehicles, reveals that proportionalities of the morphological measures of the first insect are similar to a passenger car, while the second insect has the proportional dimension that resemble a sports car, with a lower risk of rollover than the first.
The table is used primarily to determine static rollover thresholds and tilt operation capabilities.
The accelerometer is for applications such as brake deceleration compliance certification; durability testing of vehicle radiators and air coolers; roll stiffness and static rollover threshold tests, among others.
(6) FORD MOTOR CO., REAR MOVING BARRIER & STATIC ROLLOVER TESTS NO.