Developed by TEI, the TJ90 Micro Turbojet Engine with a thrust capacity of 390N±10N (90lbf) was planned to be used on the TUSAŞ product ŞİMŞEK High-Speed Target Drone. Although TEI-produced TJ90 Turbojet Engines were tested on the ŞİMŞEK High-Speed Target Aircraft, they were not subsequently used. Currently, different versions of ŞİMŞEK Drones are operating with both foreign turbojet engines and domestic turbojet engines produced by İDEALAB Company.

The first ground test of the TJ90 Micro Turbojet Engine, with a radial compressor design, took place on June 30, 2011. The first experimental flight test occurred on June 5, 2013, and the first flight test on ŞİMŞEK was conducted on June 7, 2017. The engine was ready for serial production in 2018. Following TUSAŞ's order, TEI carried out the serial production of 11 TJ90 Engines. These engines were designed to meet the very short lifespan requirement of TUSAŞ's ŞİMŞEK High-Speed Target Drone and to withstand high G-forces when operated on the ground (since it is launched from a catapult with very high acceleration to reach flight speed within a few seconds, the engine needs to function under 30-40G forces during take-off on ŞİMŞEK). Later, TUSAŞ expressed the desire to use these engines on other platforms (supersonic UAVs) and for other purposes (kamikaze UAVs/attacking ground and surface targets using ŞİMŞEK). As a result, additional requirements emerged, such as a long lifespan and high-altitude ignition capability (for example, it needs to be started at high altitudes using the windmilling technique when launched from ANKA and AKSUNGUR UCAVS).