Aeronautics 1110x 2d-slides

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    11-May-2015
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Aeronautics 1110x 2d-slides

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  • 1.Prof.dr.ir.JaccoHoekstra Geopoten'al&geometrical'tude Introduc)ontoAeronau)calEngineering

2. Thehydrosta'cequa'on Geopoten'alal'tude Assump5on:g0=constant p + p m g0 p h Area A dp=-g0dh p + p m g p hg Area A dp=-gdhg Geometrical'tude gvaries 3. Geopoten'al&geometrical'tude -Weusegeopoten5alal5tudeasdefault(easier) -Nota5on: h =geopoten'alal'tude(defaultbutwrong) hg=geometrical5tude(realal5tude) - Whatisthedierence?Howtoconvert? - Letsderivetherela5on. 4. Sowhatistheeectofourapproxima'on? e G e G R h h R h = + 6378 20 e G R km h km = = Letstrywith: 5. Sowhatistheeectofourapproxima'on? e G e G R h h R h = + 6378 20 e G R km h km = = Letstrywith: 6378000 20000 19 937.5 6378000 20000 0.3 % h m Error = = + = 6. Geopoten'al&geometrical'tude