Green Engine
For decades the aeronautics confronted itself with demands for propulsive machines more and more efficient. It is normal by now for the technologists of the aeronautical propulsion to hear about 2 digit percentages of improvement every 3 or 4 years on the power for unit of weight, thrust weight rate, reliability indices or whatever.
The today's thinking on evolution of the aero-engineering technology places the absolute accent on the compatibility of a more and more efficient and reliable propulsion with an acceptable environment by citizen and highly sustainable in the time.
If some years ago the emphasis were on the consumption in high altitude for the ozone threat, nowadays it is thought the pollution above all in proximity of the earthly level or airports proximity needs to cure, pulling down drastically emissions or of injurious gas, reversible and not, as well as noise emitted from the propeller, above all in the regimes in proximity of the airports.
