Phoenix DF

Advantages of split flaps

With traditional “big flap” designs, the break from large surfaces is very deep in the section, which can contribute negatively in some instances. But having a split surface, it gives the aircraft the same benefits of a traditional “big flap” design, without the negative of a abrupt deep brake in the section. This gives improved L/D and lower speeds in the critical phase of flight “flying low level and in weak and tight thermals”. It also allows the use of a thinner airfoil for better legs, and delays the use of ballast.

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