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View community ranking In the Top 10% of largest communities on Reddit. Understanding Helicopter's Engine | Turboshaft. Related Topics Dynamics Physics Physical science Natural science Science comments sorted by ...
A turboshaft engine (found on helicopters and turbo-prop engines) has an engine core that operates exactly like any common jet engine. The difference is that the blast coming out of the exhaust of the jet is directed to blow onto a separate turbine, called a "free turbine" since it is not mechanically connected to the gas turbine shafts in any way.
First off, some helicopters DO use "combustion engines like cars" (The Robinson R44, for example). That said, turbine engines are generally favored due to the higher power to weight ratios.
They definitely made some crap, but they made some pretty good stuff too. We even used Russian made engines based on Soviet designs for the Atlas V rocket in part because they are so reliable.
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The engine rotates almost 40k rpm. The rotor is designed to rotate about 390 rpm in flight. The engine has its own gear reduction to the output shafts and the main rotor gearbox reduces it even further.
Comparison of Helicopter Turboshaft Engines. Although they garnish less attention than their flashy jet cousins, turboshaft engines hold a specialized niche in the aviation industry. Built to be compact, efficient, and powerful, turboshafts have made modern helicopters and the feats they accomplish possible.
