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INTRODUZIONE

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INTRODUZIONE

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Rettangolo
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Nota
OE: Operating Empty
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Nota
TO: Take Off

Alcuni problemi a cui cercheremo di dare risposta:

GENESI DELLA PORTANZA E

DELLA RESISTENZA

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Effetto di Mach

Effetto di Mach

Aumento del numero Mach (~0.6-1.2) • Aumento improvviso della resistenza • Diminuzione improvvisa della portanza • Instabilità longitudinale

Ali a freccia

Riduzione del Mcr’=Mcr/cosΛ

L’ala a freccia è ideale per flussi transonici e debolmente supersonici ma comporta aumento della resistenza indotta e diminuzione della portanza a velocità basse: ali a feccia variabile

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PROSSIMI ARGOMENTI:

• Richiami di fluidodinamica (equazioni di

governo)

• Atmosfera standard

• Flussi potenziali

(metodi diretti e indiretti)