Our heavyweight helicopter equal in the world does not have
In Rostov started production of the most load-lifting rotary-wing car The Russian holding «Helicopt[...]
Induced Velocity
From the result derived in class
TO
![Подпись: Ww [y(t)] = -U](/img/3129/image2127.png "Induced Velocity"){kind=small}
22nAn
n=1 the distribution of induced velocity reads
wW[y(t)] = —UA1 – sin3^ = —2UA1 – 2cos21
 |
 |
= -2UA‘ (‘- 2 (b )’)
The parabolic distribution of ww [y(t)] is shown in Fig. 15.39. The wing experiences upwash for |2y/b| > 1Д/2.
15.10.2.3 Induced Drag
The percent change in induced drag is 33 % increase compared to the elliptic loading. The corresponding efficiency factor is e — 0.75.