Advance acoustic BIBETA 5 Manual - Página 15

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Flying with a wet glider

Flying with a completely wet wing raises the

risk of deep stall. Deep stall is often the re-

sult of a combination of factors. A wet can-

opy weighs more. The increased weight re-

sults in a higher angle of attack, always

bringing the wing closer to the deep stall

boundary. Water drops on the fabric also

have a bad effect on the laminar boundary

layer near the leading edge, and this signif-

icantly lowers the maximum lift coefficient

achievable.

To avoid the risk of deep stall with a wet

wing the glider should be braked as little as

possible, and big ears never used. If the glid-

er still goes into deep stall recovery can only

be made by accelerating with the trimmers.