Gas turbine engines are is lighter than the previous piston engines also generate much higher power and less air polluting substances. Thus, it has been regarded as high output, clean power source. However, in order to develop gas turbine engine several fields of latest technologies and system technology to formulate these technologies are required. As a result, only few leading companies own such production expertise.

Above all, technical difficulties and enormous development costs necessary to develop large gas turbine engine for manned airplanes and complex power generations prohibit the entry of new company into the market.

However, small gas turbine engine for UAV is currently being developed in active and diverse ways due to its fewer technical difficulties and lower development costs compared to the development of a large gas turbine engine.

Since 1992, Korean government supported a small class turbo shaft engine for power generation and current development capability is thought to be at the sufficient level for production.

As the gas turbine engine developmental technology become more accessible, several small-scale companies grow to be active in small turbo jet and turbo shaft engine development. Several type of turbo jet engine, producing 5 to 100 lb in output, previously have been developed for RC aircraft, UAV, and missile, but turbo shaft engines for helicopters and VTOL are believe to be in development phases or in planning stage at present.

Several advanced countries already recognized importance and tried to utilize practical use of UAV in an extreme environmental condition and monitoring purposes. In addition to the growing importance of turbo shaft engine for UAV, selection of UAV propulsion and advancement will diversify through smaller turbo shaft engine development.

The interest in helicopters and VTOL UAVs is rising for it can perform more diverse missions than the ones by stationary UAVs. Consequently, more attention is given to the development of turbo shaft engine that its used as its propulsion system.

Mini turbo shaft engines can offer diversity in propulsion system selection for UAV and its development, and its application is expected to expand from military to industrial sectors in the 21st century. It is expected that the markets for small turbo shaft engine will expend beyond the military to industrial applications.

With appropriate supporting policy and efforts, it is expected that there are enough technology know-how to successfully develop operational engines in short period of time. As mentioned earlier, there are ample supply of researchers in the country with several gas turbine engine development technology and experiences. Neuros Inc. is planning to increase its investment in turbo shaft engines that haven't completely developed yet but expect high demand in the future.

Hence, it is often employed from an environmental aspect for large power generation engines due to small contaminate emissions, its application is gradually expanding to small to middle classes also.

There have been reasonable progresses in research and development efforts in efficiency improvements; the efficiency gap with a diesel engine is increasingly narrowing down. From energy and environmental aspect, these areas need to secure internal development technologies.

Neuros, Inc put its preference in high output and compact engine development for aviation applications, and will secure efficient parts for future ground power generation engine application with heat exchangers.

Considered performance goals are generally marketable outputs for aviation application and introduced a growth engine concept for future performance improvement.

(1) Size: Diameter approximately below 20 x 50 cm

(2) Weight: Below 5 Kg

(3) Engine output: 50 HP class

Power source for unmanned helicopter agricultural chemical spraying

Power source for broadcasting unmanned helicopter

Power source for small-scale aerial picture photographing unmanned helicopter or VTOL Power source for surveillance unmanned helicopter and VTOL for forest fire or hazardous area (Fire, radioactivity, and toxic materials)

Ground heat annexation power generation engine

(2) For Military

Power source for reconnaissance UAV (helicopter and VTOL)

Power source for tactical weaponry system UAV

Power source for auxiliary power equipment (Power generation and storage)