opps Posted May 31, 2020 Share Posted May 31, 2020 (edited) In JF-17, fuel flow looks constant against airspeed. I ran engine at military power(C+T mode) for 5 minutes and observed fuel used. Test A Altitude 0 ft Mach 0.0(with wheel choks) Fuel used in 5 minutes = 5055 - 4389 = 666 lbs Fuel flow at Test A condition = 133.2 lbs/min =7992 lbs/hour Test B Altitude 25 ft Mach 0.96 Fuel used in 5 minutes = 5001 - 4330 = 671 lbs Fuel flow at Test B condition = 134.2 lbs/min =8052 lbs/hour Just for reference, I measured Mig-29's fuel flow(RD-33) via tacview. In Test A:around 7800 lbs/hour In Test B:around 12500 lbs/hour So at M 0.0 this looks ok. But at M0.96, fuel flow differs more than 60%. I don't have real RD-93's data but this result looks strange to me. Is this intended and correct behavior ?JF-17_FF_M00.trkJF-17_FF_M09.trk Edited May 31, 2020 by opps Link to comment Share on other sites More sharing options...
LJQCN101 Posted May 31, 2020 Share Posted May 31, 2020 Not a correct behavior, this will be the next emphasis. EFM / FCS developer, Deka Ironwork Simulations. Link to comment Share on other sites More sharing options...
opps Posted May 31, 2020 Author Share Posted May 31, 2020 Thanks for reply. Looking forward to future update. Link to comment Share on other sites More sharing options...
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