Project 3 Weight analysis

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1 The Faculty of Power ad Aeroautcal Egeerg Arcraft Desg Departet Project 3 Weght aalyss Ths project cossts of two parts. Frst part cludes fuselage teror (cockpt) coceptual desg. Secod part cludes etoed weght aalyss coputg the posto of cetre of gravty. Cockpt (fuselage teror) project Cockpt (fuselage teror) project should be doe for of a drawg, that shows arrageet of the arcraft equpet, takg ergooc rules to accout. I order to do that, oe ca use Szg gude for cockpts placed o the webste. Below, there are three exaples of cockpt (fuselage) projects fro prevous years. These drawgs are oly a exaple ad should ot be used as a saple or teplate. Fg. 1 Project of glder s cockpt [1] Fg. 2 Project of agrcultural arcraft s cockpt [2] Toasz Grabowsk Itroducto to Aerospace Projects gude: Weght Aalyss 1/5

2 The Faculty of Power ad Aeroautcal Egeerg Arcraft Desg Departet Fg. 3 Project of a passeger arcraft s cab top vew [3] Fg. 4 Project of a passeger arcraft s cab sde vew [3] Arcraft s weght aalyss The weght aalyss starts wth dvdg the arcraft s body to the copoets (structure, equpet, payload etc.), ad estatg the weght of these copoets, as well as postos of ther cetres of gravty. I order to do that, oe should ake a drawg called a weght breakdow (Fg. 5). Next, usg relatos (1-2) the posto of cetre of gravty ca be detered ad ts posto ca be coputed to a schee related to the ea aerodyac chord. Copoet ass data should be preseted a table, ad calculatos should be doe e.g. accordg to the schee show below. Exaple show Tab.1 shows oly a ethod of presetg results. Nuber of arcraft s copoets take to cosderato should be usually hgher. Toasz Grabowsk Itroducto to Aerospace Projects gude: Weght Aalyss 2/5

3 The Faculty of Power ad Aeroautcal Egeerg Arcraft Desg Departet Fg. 5 Jet traer s weght breakdow exaple (studet project [4]) Calculatos schee: 1. Estato of arcraft s copoets weght calculatos ad estatos are doe based o statstc data ad statstc forulas fro [5,6], 2. Loadg varats defto, 3. Coputg the Mea Aerodyac Chord ad t s posto, 4. Coputg CG (cetre of gravty) accordg to forulas:: where: X CG 1 1 YCG, 1 x y z, 1 ZCG (1) 1 5. Coputg CG posto percet of MAC: x [%] 100X ( X 0.25Ca) Ca (2) CG CG A / Ca ea aerodyac chord (MAC), X A posto of ¼ of MAC 1 Toasz Grabowsk Itroducto to Aerospace Projects gude: Weght Aalyss 3/5

4 The Faculty of Power ad Aeroautcal Egeerg Arcraft Desg Departet No. Copoet x z x x x z 1 Radar Electroc equpet # Avocs # Ejecto seat # Electroc equpet # Avocs # Battery Ejecto seat # Electroc equpet # Ar codtog Wgs Fuel tak Eges Horzotal tal APU Vertcal tal Electroc equpet Fuselage secto # Fuselage secto # Fuselage secto # Nose ladg gear Ma ladg gear Su Tab. 1 Weght breakdow geoetry ad weght data (exaple [4]) Fal results should be show a followg for: X CG = Z CG = Mea aerodyac chord 1.7 X of MAC ose 5.7 X CG = 30% Oe should check, f CG extree postos eets the codtos related to ts posto relato to the wheelbase of ladg gear. If these codtos are t et, chages to a project, leadg to eetg these codtos, should be suggested. Toasz Grabowsk Itroducto to Aerospace Projects gude: Weght Aalyss 4/5

5 The Faculty of Power ad Aeroautcal Egeerg Arcraft Desg Departet Refereces: 1. Macej Kalwara, Łukasz Pruszyńsk, Szybowec klasy otwartej sudet project Poltechka Warszawska Potr Araszkewcz, Ada Toczek, Dawd Wróbel, Potr Busz, Lekk saolot wsparca ekologczego studet project Poltechka Warszawska Marc Chrust, Adrzej Gajda, Potr Nowack, Łukasz Skoeck, Wktor Stołowsk Beg regoal jet studet project Poltechka Warszawska Toasz Bąk, Łukasz Mężyk, Kal Stępeń, Potr Wodyńsk, Odrzutowy saolot szkolobojowy Kukułka studet project Poltechka Warszawska St. Daleck Projektowae saolotów, Ofcya Wydawcza Poltechk Warszawskej, Warszawa D.P. Rayer Arcraft Desg, a Coceptual Approach, AIAA Educato Seres, 2012 Toasz Grabowsk Itroducto to Aerospace Projects gude: Weght Aalyss 5/5

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