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 Dryden Home > Collections > Photo Home > JetStar > Photo # ECN-15655 |
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JetStar | |
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| Photo Number: | ECN-15655 | |
| Photo Date: | May 21, 1981 | |
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| Formats: | 539x480 JPEG Image (87 KBytes) 1150x1024 JPEG Image (545 KBytes) 3000x2670 JPEG Image (5,943 KBytes) |
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| Photo Description: |
In this photograph, the C-140 JetStar is fitted with a model of a high-speed propeller. Three different designs were tested at NASA's Dryden Flight Research Facility in 1981-1982. Their swept-back blades were intended to increase the speed and fuel efficiency of turboprop aircraft. Speeds of Mach 0.8 were thought possible, while using 20 to 30 percent less fuel than standard jet engines. | |
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| Project Description: |
Dryden pursued this project in co-operation with the Lewis Research Center. The propellors developed and tested in the project were designed to rotate at a tip speed faster than the speed of sound. They were, in effect, "swept back wing" versions of propellors. The tests were conducted on Dryden's C-140 Jetstar, seen here on a research flight over the Mojave desert.
The JetStar was modified with the installation of an air turbine drive system. The drive motor, with a 24-inch test propellor, was mounted in a pylon atop the JetStar. The JetStar was equipped with an array of 28 microphones flush-mounted in the fuselage of the aircraft beneath the propellor. Microphones mounted on the wings and on accompanying chase aircraft provided far-field acoustic data. |
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| NASA Photo by: | NASA photo | |
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| Keywords: | C-140; JetStar; Lewis; propellor; air drive turbine; accoustic data; Dryden Flight Research Facility; Lewis Research Center | |
| Dryden Home > Collections > Photo Home > JetStar > Photo # ECN-15655 |
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Last Modified: February 6, 2002 |
