Our ongoing research and development into Stirling Engine performance has resulted in the addition of a number of performance upgrades which increase thermodynamics in the Winter 2017 range.
The photograph in Fig 1 is taken with a thermal imaging camera and shows the thermodynamic performance of a Warpfive Steelhead Stove Fan. It can clearly be seen how the heat is transferred from the hot areas (red) and how the engine is thermodynamically efficient in keeping the top part of the engine cool (light blue)
The recent addition of stainless steel air flow ports within the displacer as well as the introduction of a stainless steel base has assisted in improving overall thermodynamic performance.
As stainless steel is considerably heavier than aluminium it also has the added advantage of making the stove fan more stable.