Agenda - 05-23-1983 - Laserfiche WebLink

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:—...,••,..,-. , ... 6/24/75 AC 150/5300-4B 1 i . _ CHAPTER 3. WIND ANALYSIS AND RUNWAY ORIENTATION I I ;. GENERAL., T , • f .• a. The configuration of the airport is determined by the number and orientation of the runways. One of the primary factors influencing runway orientation is wind. _Ideally the runwa should be aligned --N with the prevailing winds. Wind con 1 Ions affect all airplanes, I thelsmallest to the largest, in varying degrees. Generally,. the 1 . , - V smaller_the_airplane, the more affected by_74nd, paiticularly A' ToaswindcomiTaintirCrosswinds are often a contrbiElf4- fil ' criall airplane some construction of two runways May-be necessary to give the desired wind coverage. - , It" , 1 1,1 ,or b. Ai:port planners and designers should, therefore, make an accurate . 1.. 1 analysis of wind to determine the orientation and number of runways. , - ( The 'proper application of the results of this analysis will add .t., substantially to the .saf62ty, and tlae.f.ulness of the airport, Appendix - 3r yides information n wind data for the purposeof lai pint, plan- I i# a design, and the following paragraphs give ['raced res in its ap lication. to runway orientation cOncepts. .'L (9. CROSSWINDS. ,11 ---.— t [-70 F .e, x a. A Crosswind component of wind direction and velocity is the resultant i vector which acts ate right angle to the runway. It is equal to the 1 at, ,a speed multiplied by the trigonometric sine of the angle between the wind direction and the runway direction. Normally, these wind 1—""'A vector triangles are solved graphically. An example is shown in -,• 4'. 1 Figure 3-1. From this diagram, one can also ascertain the headwind and tailwind component of combinations of wind velocities and direc- .1 tons. : . I b. Study and analysis of different combinations of velocities and L. diirections, having an 11.4-mile-per-hour (mph) (9.9 knots) cross- 4? wind component, have found that different combinations produce - . similar adverse effects on the control handling characteristics of 1 •k; , . airplanes. Considering this and the method of reporting wind data, the 12-mph or 10.5-knot speed was selected as a reasonable and - • convenient figure upon which to base runway orientation, 1T. ORIENTATION AND COVERAGE. The most desirable runway orientation based 1 on wind is the one which has the largest wind coverage and minimum -A I crosswind components. t . . . 4 , Chap 3 Par 8 Page 7 ,..,,.„., . -- -. ,717 ::, '0,645.:::;$?. .:4ii.;:r.