Gas turbines

A gas turbine engine arrangement comprising a first engine section, the first engine section comprising a first compressor and a first turbine mounted on a first shaft, the gas turbine engine arrangement further comprising at least one further turbine mounted on a second shaft and arranged such that gases exiting the first engine section are ducted to the at least one further turbine, wherein said first and second shafts are not mechanically coupled to one another and have respective axes which are offset from each other, wherein the further turbine is coupled to an electrical generator, and wherein the electrical generator is arranged to start the first engine section.

The gas turbine engine arrangement of claim 53 wherein the first engine section further comprises a combustor section between the first compressor and the first turbine.

A gas turbine engine comprising:

• a high pressure stage including a high pressure compressor and a high pressure turbine coupled to a first shaft, and a low pressure stage including a low pressure compressor and a low pressure turbine coupled to a second shaft, wherein said first and second shafts are non-coaxial, wherein the second shaft is coupled to a generator, and wherein the generator is arranged to start the gas turbine engine.