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Correlation of full-scale helicopter rotor performance in air with model-scale freon data
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mantay, W. R. Yeager Jr., W. T. |
| Copyright Year | 1976 |
| Description | An investigation was conducted in a transonic dynamics tunnel to measure the performance of a 1/5 scale model helicopter rotor in a Freon atmosphere. Comparisons were made between these data and full scale data obtained in air. Both the model and full scale tests were conducted at advance ratios between 0.30 and 0.40 and advancing tip Mach numbers between 0.79 and 0.95. Results show that correlation of model scale rotor performance data obtained in Freon with full scale rotor performance data in air is good with regard to data trends. Mach number effects were found to be essentially the same for the model rotor performance data obtained in Freon and the full scale rotor performance data obtained in air. It was determined that Reynolds number effects may be of the same magnitude or smaller than rotor solidity effects or blade elastic modeling in rotor aerodynamic performance testing. |
| File Size | 1687373 |
| Page Count | 62 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770005056 |
| Archival Resource Key | ark:/13960/t5w717w4h |
| Language | English |
| Publisher Date | 1976-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Performance Tests Lifting Bodies Reynolds Number Transonic Wind Tunnels Freon Aerodynamic Stability Rotary Wings Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
