Phase 1 Foundation of the elemental technology (1986 to 1992)

Elemental designs and part manufacturing technologies were learned and matured through research and development on various types of engines.

Launch of Research & Development


Technology Research Center was established, and started research on compact jet engines. The average age of the team members were just 26 years old.

Development of 1.0X, 2.5X, and 3.5X


1.0X was independently developed by utilizing ceramics which did not follow the industry trend.

1986 - 1987

Challenged to develop an engine using ceramics in the turbines and combustors, but durability was a concern.


2.5X Advanced Turbo Prop Engine that enables counter-rotating propellers for improved efficiency.

1987 - 1989

In order to achieve excellent fuel efficiency, we moved toward a cutting-edge propulsion system, 2.5X Advanced Turbo Prop Engine.
However, we were confronted by safety and noise issues of the propellers. (Honda, as well as other manufacturers in the industry, shelved the Advanced Turbo Prop Engine Program due to decreased demand caused by falling oil prices.)


A new Model 3.5X that reuses the 2.5X front portion and installs a fan into its rear was developed.

1989 - 1992

Engine type was converted from an engine which generates a propulsion force by propellers, to an engine that generates power by a fan.  Although a lot of effort was devoted to designing a unique mold to cast fan blades to reduce costs, materials of the molds could not reach the reliability target.