Tümosan puts a Turkish-built diesel into the ULAQ armed USV, giving Ankara a domestic propulsion option for unmanned craft
Türkiye’s push to remove foreign content from its unmanned platforms has reached the engine room. Tümosan, a tractor and diesel engine maker based in Konya, has delivered a domestically designed marine diesel for the ULAQ armed unmanned surface vessel, the first naval USV formally accepted into Turkish service. For NATO observers the significance lies less in the horsepower than in the supply chain: a Turkish USV programme that no longer depends on a Western or Asian engine supplier for its propulsion.
Acceptance and localisation
ULAQ was developed by ARES Shipyard under a Presidency of Defence Industries (SSB) contract, with Meteksan Defence supplying mission systems. The acceptance ceremony took place in late December 2025 with the Turkish president in attendance. Tümosan says its engine was designed by Turkish engineers, built and tested at its Konya plant, bench-tested at the TÜBİTAK research council and then run through extended sea trials aboard ULAQ. The company puts domestic content above 90 percent. General Manager Halim Tosun said the delivery shows Turkish industry can field fully domestic solutions in critical technologies such as armed USVs.
The TMSNX7 family
Tümosan’s military engine line centres on the TMSNX7, a six-cylinder, 7.8-litre common-rail diesel rated at 460 hp with torque options of 1,500 and 1,600 Nm. Speaking to Anadolu Agency in November 2024, Volkan Gün, the company’s technology and engineering group manager, said the land variant was intended for 4×4, 6×6 and 8×8 armoured vehicles and that testing was largely complete, while the marinised variant had been trialled on ULAQ and delivered to the Turkish Navy’s General Directorate of Shipyards for tugs. Initial capacity at Konya is 800 engines a year, expandable to 1,500 on demand. At IDEF 2025 the company also unveiled the TMSN460 MARİN, a variant pitched specifically at armed USVs.
The transmission side matters for armoured vehicle programmes. Tümosan says it builds its own gearboxes for tractors at 97 percent localisation and has tested a synchromesh automatic transmission on the PUSAT 4×4 tactical vehicle, with a six-forward, one-reverse fully automatic unit in a second development phase.
Naval deliveries and the ÖMTTZA powerpack
Under a strategic cooperation agreement signed with the General Directorate of Shipyards in 2022, Tümosan holds a contract for 22 marine engines. As of 2025 it had delivered 14 marine power units to naval shipyards at Gölcük, Aksaz, İzmir, Foça and Mersin, where they replace imported engines in Katır-class tugs. The company is also preparing powerpack subsystems of up to 500 hp for the ÖMTTZA special-purpose tactical wheeled armoured vehicle programme run by SSB with the Land Forces and Gendarmerie commands.
Context
Founded in 1976 and part of the Albayrak Group, Tümosan is listed on Borsa Istanbul under the ticker TMSN. Its core business remains agricultural tractors, where it has led the Turkish market for well over a decade according to its own reporting; defence is a growing but still secondary line. In 2026 the company disclosed a non-binding five-year framework with South Korea’s Daedong for sub-57 hp tractor powertrains and said equipment installation at a new emission after-treatment plant in Konya would begin in October 2026 ahead of commissioning in late 2027. No verified public figure exists for 2026 military engine output.
A company profile is available on the Tümosan page in our Turkish defence industry directory.
Frequently Asked Questions
What engine powers the ULAQ armed USV?
A Tümosan-built marine diesel that the company says is more than 90 percent domestic; it was bench-tested at TÜBİTAK and sea-trialled aboard ULAQ before acceptance in December 2025.
What is the TMSNX7?
A six-cylinder, 7.8-litre common-rail diesel rated at 460 hp with 1,500 or 1,600 Nm of torque, offered in land and marine variants.
How many military engines can Tümosan build?
The Konya line starts at 800 engines a year and can expand to 1,500 depending on demand, according to the company.
