Design of Wind Tunnels and Wind Tunnel Propellers II (1921)
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REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS. 4 efficient at high speed than the parabolic cone. In Fig. 4 is shown the slip of this propeller in the parabolic cone and in the straight cone and it is noted that the slip is less at high speeds for the straight cone. It is then evident that the… … o /o 20 so 40 o /o eo 30 40 F/g.3. A/r- speed /n m.p.s. F/g.<4. Air speed 'n m.p.s. EFFECT OF SIZE OF THE ROOM. All the test runs described in Report No. 73 were conducted in a large room, approximating to free-air conditions. In the tests described in this report a temporary room was built around…
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