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Strain gage loads calibration testing with airbag support for the gulfstream iii subsonic research aircraft testbed (scrat) (Document No: 20150000842)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Miller, Eric J. Hudson, Larry D. Neufeld, David C. Haraguchi, Ronnie Holguin, Andrew C. Lokos, William A. |
| Copyright Year | 2015 |
| Description | This paper describes the design and conduct of the strain-gage load calibration ground test of the SubsoniC Research Aircraft Testbed, Gulfstream III aircraft, and the subsequent data analysis and results. The goal of this effort was to create and validate multi-gage load equations for shear force, bending moment, and torque for two wing measurement stations. For some of the testing the aircraft was supported by three airbags in order to isolate the wing structure from extraneous load inputs through the main landing gear. Thirty-two strain gage bridges were installed on the left wing. Hydraulic loads were applied to the wing lower surface through a total of 16 load zones. Some dead-weight load cases were applied to the upper wing surface using shot bags. Maximum applied loads reached 54,000 lb. Twenty-six load cases were applied with the aircraft resting on its landing gear, and 16 load cases were performed with the aircraft supported by the nose gear and three airbags around the center of gravity. Maximum wing tip deflection reached 17 inches. An assortment of 2, 3, 4, and 5 strain-gage load equations were derived and evaluated against independent check cases. The better load equations had root mean square errors less than 1 percent. Test techniques and lessons learned are discussed. |
| File Size | 2103343 |
| Page Count | 27 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150000842 |
| Archival Resource Key | ark:/13960/t50g8p25m |
| Language | English |
| Publisher Date | 2015-01-05 |
| Access Restriction | Open |
| Subject Keyword | Flight Tests Strain Gage Calibration Loads Calibration Test Wing Loading Trailing Edge Flap Loads Test Design Root-mean-square Errors Lessons Learned Error Analysis Research Aircraft Calibrating Landing Gear Jet Aircraft Strain Gages Inflatable Structures Jet Flaps Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
