Its the Not fuel flow or the Fuel management Issue, if its an Older gen engine then it would Produce a plume AKA Hot Gas Emission. And its more down to a design issue rather then Usage. Simply put whenever that Engine would Reheat for an after burner, rest assured it would be lighting its self up on any Passive IR Sensor in the Vicinity.Pendekar said:maybe the fuel-air ratio is not right. lot of smoke means the engine is not reaching optimal fuel burn. i guess they should adjusting the fuel line a little bit.
blame the russian enginesP.A.F said:nice pics. but the thing lets off to much smoke!!!