By Ina Hunt


If you are ready for takeoff you need to ensure that your takeoff is not overweight. You need to make sure that you are not leaving payload behind. It is also important to make sure the field length calculations are correct. To make sure that all these factors are in order then you need to have a runway analysis done. This is a calculation to determine the takeoff and landing weights.

This calculation uses two main elements. The fist being AMF performance data and the second being runway and obstacle data. When these two parameters are available it is possible to prepare a complete analysis to determine the necessary weights. AMF data is required by airworthiness standards and specific requirements are defined in the flight test section. These data is usually collected during the flight test phase of certification.

Analysis done on the runway are used to evaluate the maximum allowable takeoff for the airstrip conditions. The perfect take off speeds and airplane settings are considered. The FAA and the Airplane Flight Manual specifies the limitations. All the required information is delivered in a complete manual. This manual has any description of all the airstrips that the aircraft is made to fly to.

The information for the landing strips is taken from a database that is around the world. It is assembled from government and industry sources. These sort of estimations are extremely paramount when it comes to planning. Mostly, they are given when they are required. The computations could be acquired by the clients when they require the information. They can get a paper duplicate or they can get the data through the web.

The most extreme weight that is reasonable is dictated by factoring a few components. One of the elements is the most extreme guaranteed takeoff weight. An alternate variable is the ascension constrained weight. In other words this is the weight at which the last fragment and the second section climb sections are feasible for the temperature and also the height of the airfield.

An alternate component is the field length constrained weight. This is the maximum weight which an airplane complies with the FAR standards as far as the height, slant, wind, length, and temperature of the airstrip are concerned. Obstacle restricted weight is an additional factor. This is the impediment needed by the FAR. The constrained weight is also a function of height, incline, separation, temperature, stature and wind.

Unless it is specified in the calculations a straight out flight path is assumed as the clearance for obstruction along the extended center line. Brake energy capacity is another characteristic that is evaluated. It is evaluated to ensure that weights shown after the calculations are compliant with the limitations of the brake energy.

Tire speed is also evaluated as one of the factors. The speed is evaluated to ensure that weights are compliant to the speed limitations of the tires. Tables are created from calculations and used by customers to effect procedures that minimize thrust.




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