3.A.2.Ramjet, scramjet, pulse jet, detonation, or 'combined cycle' engines, including devices to regulate combustion, and specially designed components therefor, usable in the systems specified in 1.A. or 19.A.2.

Technical Notes:
1. In Item 3.A.2., 'combined cycle' engine is the engine that employs two or more cycles of the following engine types: gas-turbine (turbojet, turboprop, turbofan and turboshaft), ramjet, scramjet, pulse jet, detonation or rocket motor or rocket engine (liquid, gel, solid propellant and hybrid).
2. In Item 3.A.2., detonation engines utilise detonation to produce a rise in effective pressure across the combustion chamber. Examples of detonation engines include pulse detonation engines, rotating detonation engines or continuous wave detonation engines.