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SET-1 Space TransportTypeCargo/Transport
Reusable Reentry VehicleCrew6Carrying Capacity20 troops
13,607 kg of CargoLength35.7 m (116.8 ft)Wingspan15.5 m (50.85 ft)Height8.6 m (28.2 ft)Empty Weight32,749 kg (72,200 lb)Loaded Weight47,649 kg (105,048 lb)
Maximum Speed675 km/h (Surface)
6,900 m/s (Orbit)Range106,704 km (66,302 mi)Service Ceiling135 km (83.89 mi)Cost$4.6 Billion
The SET-1 is equipped with two different types of propulsion systems, two F-140/32 continuous-bleed afterburning turbojets and two A Class Ion Thrusters. The reasoning behind this is that turbojets cannot operate in extra-atmospheric conditions, as in order to operate, they need air intake, which they then compress. These turbojets are meant to elevate the SET-1 to 17 km. At this altitude, two relatively small rocket boosters mounted under the turbofan's exhaust ports propel the SET-1 to 18.8 km where the aircraft's A Class ion thrusters take over. Unlike the turbojets, the ion thrusters are powered from xenon, not requiring atmospheric oxygen for compression. These ion thrusters were a suitable replacement for the original solid socket boosters intended to propel the aircraft as xenon was a more efficient and a safer fuel than rocket fuel and the ion thrusters gave a smaller profile than the rocket boosters. Once in the Thermosphere, the ion thrusters take over completely, propelling SET-1 at a maximum velocity which translates into just under 7 km/s. This means that SET-1 can drop half a platoon of paratroopers anywhere in the world in just over four and a half hours. Large amounts of compressed xenon are stored at the midship of the aircraft, able to power the ion thrusters for 106,000 km. Refrigerated jet fuel is stored just behind this compartment, giving SET-1 a range of 1,100 km when the turbojets are active.
The SET-1's avionics are similar to that of other transportation aircraft with the addition of rocket vectoring and fuel descriptions, and orbital navigation systems. The PS-89/A is a heavily modified version of the PS-23/A standard in most LORD constructed fighter aircraft. It is able to detect aircraft up to 800 kilometers (497 miles) from the module, and naval vessels at ranges of up to 450 kilometers (279 miles) away, provided it is within 15 km of the sea-level. The PS-89/A ensures terrain mapping by synthetic aperture in order to gain high resolution pictures, automatic target detection during a dogfight, tracking of targets on he ground and in the air and allows accurate targeting and tracking of air to air missiles. This module also has the ability to jam enemy RADAR within a veil of 120 kilometers (75 miles) and completely destroy enemy electronics at ranges of 90 kilometers (55 miles) through a large increase of electromagnetic waves in the module's radio frequency. The aircraft's air frame and its overall shape aids in stealth over other aircraft dramatically. The SET-1 can be launched from any standard airfield and can be used as a transport over shorter distances, flying within the atmosphere at distances of 1,287 km (800 miles). It can also be used as a cargo aircraft, able to carry up to 13,607 kilograms of cargo.
A switchblade wing with a swept angle of 46° is carried in the underbelly of the aircraft, used during take off, flight within the atmosphere and immediately after atmospheric reentry. This wing is usually concealed when travelling outside of the atmosphere. The outer layer of the SET-1 is constructed out of special heat resistant tiles which protects the shell of the craft from the massive temperatures of reentry (up to 1,700° C). These tiles are constructed similarly to the Lochinver Space Shuttle, and the layers of tiles are listed as follows:
- Reinforced carbon-carbon (RCC), used in the nose cap, the chin area between the nose cap and nosewheel doors, and wing leading edges. Used where reentry temperature exceeds 1,260 °C (2,300 °F).
High-temperature reusable surface insulation (HRSI) tiles, used on the orbiter underside. Made of coated LI-900 Silica ceramics. Used where reentry temperature is below 1260 °C.- Fibrous refractory composite insulation (FRCI) tiles, used to provide improved strength, durability, resistance to coating cracking and weight reduction. Some HRSI tiles were replaced by this type.
- Flexible Insulation Blankets (FIB), a quilted, flexible blanket-like surface insulation. Used where reentry temperature is below 649 °C (1,200 °F).
- Low-temperature Reusable Surface Insulation (LRSI) tiles, formerly used on the upper fuselage, but now mostly replaced by FIB. Used in temperature ranges roughly similar to FIB.
- Toughened unipiece fibrous insulation (TUFI) tiles, a stronger, tougher tile which came into use in 1996. Used in high and low temperature areas.
- Felt reusable surface insulation (FRSI). White Nomex felt blankets on the upper payload bay doors, portions of the midfuselage and aft fuselage sides, portions of the upper wing surface and a portion of the OMS/RCS pods. Used where temperatures stay below 371 °C (700 °F).
The structure of the craft is created of Titanium, used for both its melting point of 1,900°C, its strength and its relatively light weight. The interior of the craft is lined with Kevlar and composite armor in order to decrease the chance of crippling damage from the interior of the aircraft. The SET-1 has an air filtering system, recycling carbon dioxide (CO2) exhaled by the crew and passengers into breathable oxygen. One days worth of rations are usually carried on board for the six crew members (pilot, co-pilot, 2 navigation specialists, communication expert and engineer). Twenty seats in the cabin of the aircraft can house sixteen fully armed paratroopers, which are deployed at 1,100 feet. Two jump doors located on either side of the aircraft are opened when near the drop zone, from where the paratroopers take over. These doors may not be engaged while in orbit, thanks to the air pressure and several built in safeguards.