Some aspects of the comparison of model and full-scale tests (1926)
NASA Technical Reports Server (NTRS) · leaf 18
ariations x>f blade sections, etc. Bnt after all when we go back to first principles these results are perfectly natural. In air the pressure in the slipstream can not differ much from the undisturbed pressure of the air. Then the thrust is proportional to the stemward momentum, and as shown in… … Scafe for pJVZs FlO.U due to edge or frictional resistance of the blades and to the transverse momentum communicated to the air involving energy. Neither of these two further losses can be eliminated, and from the nature of the case it does not seem that there is a large field for reducing them,…
NASA Technical Reports Server (NTRS)
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