Review By: Stephen Bell
Thunder Tiger has just released a completely new helicopter engine to replace the TT50. This is not as we often see a punched out modified power plant aimed at extending product life. The popular 50-sized helicopter exists due to low operating costs both for fuel and parts plus has the attraction of being very easy to transport. The power to weight ratio is slightly less than the 90 format in most cases, this however is about to change. Recently the strongest engines available were the OS hyper and pumped YS51-ST. Volumetric efficiency of these two very good engines is about as good as it gets, meaning any further attempt to increase this parameter would likely have an affect on throttling smoothness.
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