This is Synergy N9 3D heli that's normally nitro powered with a Wren turbine shoved into it and a opti smoke system installed.

From the owner:

"Wren mw44 powered Synergy N9, running at 2200-2300 rpm on the head (approx 175k rpm engine speed). Flying at the new ARA field on a very hot and sunny Good Friday. This machine weighs in with fuel and smoke fluid at just shy of 7kg. Running on Jet A1 fuel, with Opti-Smoke smoke fluid. Run time is about 4.5 minutes on a single tank of 600ml plus the 200ml UAT in reserve. The machine is fully 3D capable, and has been toally 100% reliable, not a single failure in 12 hours plus of runtime on the engine and airframe."