Fuel Flow

[opps]

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.trk

JF-17_FF_M09.trk

Edited May 31, 2020 by opps

[LJQCN101]

Not a correct behavior, this will be the next emphasis.

[opps]

Thanks for reply. Looking forward to future update.