8412.10.00 - Reaction engines other than turbojets

HTS code 8412.10.00 encompasses "Reaction engines other than turbojets." This category specifically includes engines that generate thrust by expelling mass, but excludes those that operate on the principle of a gas turbine, commonly known as turbojets. Examples include rocket engines and missile engines, which function by the rapid expulsion of hot gases generated from the combustion of propellants.

This classification is distinct from its siblings which cover hydraulic and pneumatic power engines and motors (8412.20 and 8412.30, respectively), as well as other types of engines and motors not otherwise specified (8412.80). While all fall under the broader heading of "Other engines and motors," 8412.10.00 is specifically reserved for reaction engines that do not rely on an internal turbine to generate power. The "Parts" category (8412.90) would cover components of any engines classified under heading 8412.

Within the 8412.10.00 classification, further subdivisions exist to refine the classification. Subcategories 8412.10.00.10 and 8412.10.00.90 differentiate between missile and rocket engines, and other types of reaction engines respectively. This allows for more granular tracking and statistical reporting of specific engine types used for propulsion in aerospace and defense applications.