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Performante de zbor

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AEROCLUBUL ROMÂNIEI<br />

g = acceleratia gravitationala (9,81 m/s2)<br />

Fc = forta centripeta „<strong>de</strong> comanda”; aceasta forta se compune geometric cu<br />

greutatea avionului (G) si da o forta rezultanta FR care este in orice caz mai<br />

mare <strong>de</strong>cat greutatea (G) si care este inclinata cu un unghi (β) fata <strong>de</strong><br />

directia fortei G.<br />

Factori <strong>de</strong> influenta:<br />

a) greutatea;<br />

b) forta centripeta;<br />

c) forta portanta;<br />

d) forta <strong>de</strong> tractiune.<br />

Fig 2.34. Fortele in viraj<br />

Parametrii virajului:<br />

a) viteza <strong>de</strong> viraj;<br />

b) unghiul <strong>de</strong> inclinare (β);<br />

c) raza <strong>de</strong> viraj;<br />

d) tractiunea necesara virajului (Ft viraj);<br />

e) puterea necesara virajului (P viraj);<br />

f) timp <strong>de</strong> viraj.<br />

Virajul corect este virajul la care viteza aeronavei pe traiectorie este<br />

constanta in modul, inaltimea (H) si unghiul <strong>de</strong> inclinare. Traiectoria unui astfel<br />

<strong>de</strong> <strong>zbor</strong> va fi o circumferinta.<br />

<strong>Performante</strong> <strong>de</strong> <strong>zbor</strong> si planificarea <strong>zbor</strong>ului februarie 2011<br />

<strong>Performante</strong> 46

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