This entry submits the use of the Landin Engine in aircraft use to replace the conventional turbine. The basic Landin Engine design was submitted in last year's contest, and can be seen here: http://contest.techbriefs.com/sustainable-technologies-2011/1450

In aircraft use, multiple engine units are coupled together to achieve the necessary power output.

The advantages over a conventional turbine are:
-Less weight
-Less fuel consumption
-Less noise and environmental pollution
-Longer travel distance with the same amount of fuel
-Manufactured at a lower cost
-Each engine unit is a complete engine increasing the safety margin

In conclusion, this might be a better choice for the future of aircraft propulsion.