| Abstract | An attempt was made to calibrate the fuel flow measuring system at the engine test facility, CFB Baden-Soellingen, by means of transfer standards of the National Research Council Canada. In normal operating mode, with reference meters installed in series in the fuel system, the facility readout displayed extraordinary fluctuations of up to 7270 lbm/h, or 88% of mean flowrate, when the NRCC measuring system indicated stable flow. These instabilities in the ETF flow measuring system precluded any calibration. Flew measurements from the engine core flowmeter were relatively stable and within 0.85% of NRCC data, at maximum flow, tut deviated by up to 2.2% from the reference measurement under throttled operation. Recommendations have been made for improvements in the fuel flow calculation method. |
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