NASA Technical Reports Server (NTRS) 19930091292: The Air Forces on a Model of the Sperry Messenger Airplane Without Propeller
NASA Technical Reports Server (NTRS) 19930091292: The Air Forces on a Model of the Sperry Messenger Airplane Without Propeller is available to read online for free. This page gives direct access to the full text through the embedded reader above, making it easier to preview, study, or read the work without extra steps.
This edition is associated with NASA Technical Reports Server (NTRS) and a publication year of 1926.
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Description
NASA Technical Reports Server (NTRS) 19930091292: The Air Forces on a Model of the Sperry Messenger Airplane Without Propeller
Author: NASA Technical Reports Server (NTRS)
Year: 1926
This is a report on a scale effect research which was made in the variable-density wind tunnel of the National Advisory Committee for Aeronautics at the request of the Army Air Service. A 1/10 scale model of the sperry messenger airplane with USA-5 wings was tested without a propeller at various Reynolds numbers up to the full scale value. Two series of tests were: the first on the original model which was of the usual simplified construction, and the second on a modified model embodying a great amount of detail. The experimental results show that the scale effect is almost entirely confined to the drag. It was also found that the model should be geometrically similar to the full-scale airplane if the test data are to be directly applicable to full scale.
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