H.GR-21 Thureos

H.GR-21 Thureos
Type	Intercontinental Ballistic Missile (ICBM)
Place of origin	Willink
Service history
In service	2021-present
Used by	Willink
Production history
Designed	2009-2021
Manufacturer	Institoúto Stratigikón Naftikón Erevnón
Unit cost	$50-70 million USD
Produced	2021-
Variants	H.UR-3 Oceanus
Specifications
Weight	209.5 to 231.5 tons
Length	119ft
Diameter	11ft
Warhead	high yield thermonuclear, MIRV, MARV, EMP, high yield thermobaric, anti-fleet, tactical nuclear, biological/chemical, decoy
Detonation mechanism	Ground burst, air burst, kinetic
Blast yield	up to 150mt depending on configuration
Propellant	Three-stage solid-fuel
Operational range	15,000-18,000 km
Speed	Mach 20+
Guidance system	INS, GNSS, TERCOM, Autonomous, Celestial
Accuracy	5-10 m CEP
Launch platform	Silo, TEL, Submarine (SLBM)

The H.GR-21 Thureos is an superheavy intercontinental ballistic missile and FOBS platform developed by the Willinkian conglomerate and defense contractor Institoúto Stratigikón Naftikón Erevnó (ISNE). Designed following Willinkian experience utilizing rocket systems from Zeppelin Manufacturers and Izistan, the Thureos is designed as a highly adaptable system for strategic and tactical needs, operable from several launch mediums, and mounting a variety of payloads.

Design

The Thureos large size and high throw weight of 12 metric tons classify it as a superheavy ICBM; it is variously designed to deliver large-yield thermonuclear strikes on large population centers and military targets, as well as saturation attacks; the Thureos is capable of carrying four large hypersonic guide vehicles, permitting a host of different payloads to be delivered. Willink utilized nuclear weapons for the first time in combat in 2005, destroying military and civilian targets in Saharistan with Menavlon ICBM's in response to a Saharistani nuclear strike of the city of Nesha which killed over one million people. Given the vastly larger scale of nations, urban centers, and military-industrial facilities in Haven, Gholgoth, and Greater Dienstad, a more weighty, sophisticated, and multifaceted delivery platform was necessary. Willink further gained valuable experience operating Khan Class Heavy Ship to Ship missiles and various Izistani rocketry launch platforms, taking valuble lessons from some the region's cutting-edge rocket science. The Thureos incorporates advanced materials, propulsion, and countermeasures to maximize its utility against large, technologically sophisticated adversaries.

Propulsion

The Thureos utilizes a three-stage, mixed fuel propulsion system. The first stage consists of a lightweight composite casing using carbon-carbon reinforced with ablative liners, producing 3,500 kN of thrust, fueled by a PBHT-based solid propellant combined with metalized additives. The second stage consists of a composite-aluminum structure with active thermal cooling, mounting an array of decoys, chaff, and electronic jammers. This stage produces 1,500 kN of thrust, fueled with a solid propellant mixture optimized for mid-course acceleration. The third stage consists of a maneuverable post-boost vehicle housing up to 20 MIRVs or (up to) 4 hypersonic glide vehicles, producing 250 kN of thrust, and fueled by liquid bi-propellant for fine maneuvering and MIRV deployment. The glide vehicles of the Thureos employ ablative materials, carbon-carbon composites, and ultra-high-temperature ceramics to survive temperatures above 2,000°C during reentry. The HGV's of the Thureos are capable of recorded speeds of Mach 20+ (~25,000 km/h) during reentry and Mach 10–15 (~12,000–18,000 km/h) while in glide velocity.