The primary objective of this document is to describe the systematic and random measurement uncertainties which may be expected when testing gas turbine engines in a range of different test facilities. The documentation covers a "traditional" method for estimating pretest uncertainties and a "new" method for computing and comparing posttest uncertainties. To determine these posttest uncertainties, data generated during the AGARD Uniform Engine Test Program (UETP) were analyzed and compared to the pretest estimates. The proposed procedure provides a mechanism for determining the expected accuracy of test results obtained from facilities which were not previously cross calibrated. Furthermore, the method can be used to assist in making cost-effective management decisions on the level of validation/cross calibration necessary when bringing a test facility on line.
SAE AIR4979-2004 history
2012SAE AIR4979A-2012 Estimation of Measurement Uncertainty in Engine Tests Based on Nato Agard Uniform Engine Test Program
2004SAE AIR4979-2004 Estimation of Measurement Uncertainty in Engine Tests Based on NATO AGARD Uniform Engine Test Program
1996SAE AIR4979-1996 Estimation of Measurement Uncertainty in Engine Tests Based on NATO AGARD Uniform Engine Test Program