It is proposed to improve the takeoff performance of a single-engined aircraft f

Question

It is proposed to improve the takeoff performance of a single-engined aircraft fitted with a 50-in-diammeter propeller, by replacing the propeller with one having twice the disk area, but the same thrust of 660 lb (2.934kN) at 60 knots in sea-level-standard air conditions. Compare the following characteristics of the two propellers using ideal (Froude) theory: a) inflow factor a, b) airspeed through the propeller disk, c) mass flow through the propeller disk, d) slipstream speed, e) propulsive efficiency.

Explanation / Answer

go through this site and undersatand the concept .. instead of solving problem https://docs.google.com/viewer?a=v&q=cache:wHq9D7burZoJ:traktoria.org/files/personal_submarine/propulsion/propeller/lecture_notes/propeller_theories.pdf+&hl=en&gl=in&pid=bl&srcid=ADGEESh9ZOprTPFcNdXi_UfrcnODkqcgXRF9j0Jay09HbMjZkGo58_Yn67tr4JI-D7tEbbgy0_tbb2JKdKM6S_DA_Kt09nOCKDCGBwLcpniGWGlJYkIcap96sXV8YHU9Cxbe3f7cTeZm&sig=AHIEtbSjFD5nJMYBrNPDo_c85EJwkDLmEg rate me if it is helpful

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