Question

6 from 42 Determine the thust required for the horizontal flight Prey if: -engine thrust is P=8300 N, - flight velovity is M=0,7, - flight altitude is H=0 KM, - aircraft drag force is X = 3700 N, - aircraft lift force is Y = 15303 N, - aircraft mass is m=1200 kg, - aircraft wing's area is S=70 m2, - attack angle is a=100 106784 6483 10566 3482 2846 1245 Start the test

Answer 1

Page 1 Given that y engine twat is P = 8300 to & flight velocity is th=0.I mis - flight attitude 18 H= okm force is ta = 37 voru - Aircraft dift force is Ya = 1530310 Aircraft mass in m = 1200 leg → Aircraft wing's area is 3=70 m² attack angle iq a = 100 Aircraft drag we have to find out thougt force required for the Horizontal flight Prea = ? Now, AL=7 Prea >Foxo •W=my

(Page 2] comdition for Steady level flight Horizontal flight willenna O L-w=o I Porea - Fo=0 Foto -lin from equation W-L- - W-Ya=0 Wa Ya we know that Lift force L=Yaz 오질 SAV W = x 1 SAV2 (2) 9 AV? Cq= Lift force conefficient W = weight of Aircraft = mg

from eavation (ii) Page-3]. Prea Prea - Xa=0 » Prea = xa we know that, Drag force Fo=xa force co x I SAV2] CD=Drag co-efficient Prea = (Co) X-1 SAVE = (13) * COD from eavation Prea Wxlcp Z Thougat required for horizonta flight. Ха 2 SAV2 Ž SAV2 Ya 2 SAV2 Ź JAV Co Fo FL Xa Ya

(Page 4 Prea= wxco W x xa Ya 11 long) x 3700 15303 (1200 x 9.81 x 3700 15303 1200 x 9.81 xo.24 17 826 Prea 2846.264 > | Proca ~ 2846 oftion @ A G. Thrust reauired for Horizontal flight