Accession Number:

AD0270110

Title:

APPLICATION OF SMALL-SCALE PROPELLER TEST DATA TO V/STOL AIRCRAFT DESIGN

Descriptive Note:

Corporate Author:

PRINCETON UNIV N J

Personal Author(s):

Report Date:

1961-10-01

Pagination or Media Count:

1.0

Abstract:

A compilation of available experimental and analytical data is presented, dealing with the effects of propellers and rotors on VSTOL take-off and transition flight. Since the majority of the experimental work was conducted with small-scale propellersrotors, considerable effort was expended to demonstrate the applicability of these data to full-scale propellers. The dependence of take-off performance on blade Reynolds number and tip Mach number is described. Recent results from the Navy flying wind tunnel have conclusively indicated the dependence of model VSTOL transition flight data on the character of the model test facility. Therefore, the correlation of model vs. fullscale propellerrotor transition data was impossible because of the non-availability of accurate full-scale results. Data are presented describing identical tests run on the airship and in three different wind tunnels. A brief analytical treatment is described which might enable more work to proceed to correct for wall interference. In addition, the experimental techniques used to obtain accurate low velocity measurements and to obtain vibration-free straingage traces are briefly described. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE