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NASA-LLIS-1261
Lessons Learned - Worst-case Conditions Involving Wind Tunnel Test Conditions and Model Configurations Not Properly Identified, Reviewed and Assessed
Year: 2002
Abstract: Description of Driving Event:
While testing at Mach 0.8 in the 16-ft Transonic Tunnel, a full-scale F-15 inlet model separated from the sting. The model traveled downstream and impacted the catch screen and turning vanes. The impact resulted in total loss of the model and damage to the screen. Some debris got through the screen and damaged the wind tunnel blades. The sting was also damaged.
An investigation team concluded that the aerodynamic loads on the model resulted in sting loads that exceeded the ultimate strength of the sting. Possible reasons the large loads occurred are: operating at a Mach Number not in the original test envelope, F-15 cowl traveled past intended angle, sting deflection, and dynamic loads.
THERE ARE 6 LESSONS IN LLIS FOR THIS DRIVING EVENT.
While testing at Mach 0.8 in the 16-ft Transonic Tunnel, a full-scale F-15 inlet model separated from the sting. The model traveled downstream and impacted the catch screen and turning vanes. The impact resulted in total loss of the model and damage to the screen. Some debris got through the screen and damaged the wind tunnel blades. The sting was also damaged.
An investigation team concluded that the aerodynamic loads on the model resulted in sting loads that exceeded the ultimate strength of the sting. Possible reasons the large loads occurred are: operating at a Mach Number not in the original test envelope, F-15 cowl traveled past intended angle, sting deflection, and dynamic loads.
THERE ARE 6 LESSONS IN LLIS FOR THIS DRIVING EVENT.
Subject: Facilities
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:11:43Z | |
| date available | 2017-09-04T16:11:43Z | |
| date copyright | 01/01/2002 | |
| date issued | 2002 | |
| identifier other | SMVEQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/74921 | |
| description abstract | Description of Driving Event: While testing at Mach 0.8 in the 16-ft Transonic Tunnel, a full-scale F-15 inlet model separated from the sting. The model traveled downstream and impacted the catch screen and turning vanes. The impact resulted in total loss of the model and damage to the screen. Some debris got through the screen and damaged the wind tunnel blades. The sting was also damaged. An investigation team concluded that the aerodynamic loads on the model resulted in sting loads that exceeded the ultimate strength of the sting. Possible reasons the large loads occurred are: operating at a Mach Number not in the original test envelope, F-15 cowl traveled past intended angle, sting deflection, and dynamic loads. THERE ARE 6 LESSONS IN LLIS FOR THIS DRIVING EVENT. | |
| language | English | |
| title | NASA-LLIS-1261 | num |
| title | Lessons Learned - Worst-case Conditions Involving Wind Tunnel Test Conditions and Model Configurations Not Properly Identified, Reviewed and Assessed | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2002 | |
| contenttype | fulltext | |
| subject keywords | Facilities | |
| subject keywords | Test & Verification | |
| subject keywords | Test Facility |