I was intrigued by an above comment about miniature jet engines - Iran last year announced a jet-powered Shahed drone variant, which uses an engine that has an interesting backstory:
There are many variants of [the French Microturbo TRI 60] engine and it is used in many missiles and UAVs, as listed below. Aside from the known uses listed below, it is widely speculated that Iran illegally purchased many TRI 60 engines from Microturbo to assemble C-802 cruise missiles purchased from China. It is unclear which variant was purchased. Iran also reverse-engineered this engine as the Toloue-4 turbojet engine. Toloue-4 is used in several Iranian military equipment including Iran's copy of C-802, the Noor missile.
It's fascinating how many engineering artifacts turn out to have been invented just once. This is the same engine used in Storm Shadow / SCALP EG, so both sides in the Ukraine war are firing variants of a 1970s miniature French jet engine at each other.
