The Air Forces on a Model of the Sperry Messenger Airplane Without Propeller (1926)
NASA Technical Reports Server (NTRS) · leaf 10
9 The absolute decrease in drag in passing from the lowest to the highest Reynolds number appears to be substantially independent of angle of attack except at the highest angle -18°. These differences are as follows; The great increase at 18° is no doubt due to the change in type of flow which is… … 100,000 500,000 1,000,000 3,000,000 Reynolds Number Fig. 8.—Variation of drag coeflQcient with Reynolds number for Sperry Messenger model. Variable Density Wind Tunnel The differences between the absolute drags and the exponents for the original and modified models can not be entirely accounted for…
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