check valve 114 as a consequence the entirety of the fuel during a starting position will be injected into the combustor through the injector 46 1 the injectors 46 2 through 46 6 are isolated at this time because the check valve 114 will generally remain closed when a start is achieved the system including the valves 104 and 116 will conventionally act to increase the rate of fuel flow to accelerate the turbine wheel because the fuel injectors 46 provide some resistance to the flow of fuel a pressure increase will occur upstream of the injector 46 1 and such pressure increase will result in fuel pressure exceeding the crack value of the check valve 110 at this time fuel will flow to all of the injectors 46 1 through 46 6 to provide fuel to the engine in a conventional fashion thus it will be appreciated that in the embodiment shown in fig6 the injector 46 1 acts as a combination start and main fuel injector while the injectors 46 2 through 46 6 inclusive act solely as main fuel injectors because of the pressure differential that is involved as between the injector 46 1 on the one hand and the injectors 46 2 through 46 6 on the other frequently the orifices associated with the injectors 46 2 through 46 6 are made somewhat larger than the orifices associated with the fuel injector 46 1 and the difference in orifice.