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Soyuz-3 launch vehicle |
WINGLESS VERSION The originally released configuration of the new spacecraft was a "lifting body," which provided effective aerodynamic lifting force during the reentry into the atmosphere. As a result, the ship would be able to conduct side maneuvers during its return to Earth, unlike a traditional reentry capsule, which is usually limited to a narrow corridor along the ground track of its final orbit. The aerodynamic body of the Kliper sporting two vertical and one horizontal movable rudders on its tail would allow the vehicle to glide as far as 500 kilometers left and right from the ground track of its orbit, with G-loads not exceeding 2 and the skin temperature in the most critical area of the nose not exceeding 3,000K. The spacecraft would feature combination of thermal protection systems borrowed from the Buran program and from the Soyuz spacecraft. Some sections of the thermal protection system, such as original nose section with the attachments for the emergency escape rocket, would be expendable. The orginal landing system of a lifting-body version The Kliper would land with the help of a three main uncontrolled parachutes and several solid-propellant engines, which would be fired shortly before the touchdown. As of February 2004, engineers were still debating a choice between special landing legs and an inflatable cushioning device to soften the landing. The latter would probably enable the spacecraft to safely splashdown in the water. The flight control system should be able to "zero in" on the landing site with the total area of one by one kilometer. Prior to each re-flight, critical parts of the thermal protection system, parachutes and soft landing engines would be replaced. WINGED VERSION In November 2004, RKK Energia presented a winged version of the Kliper spacecraft, developed in cooperation with the OKB Sukhoi, a renown manufacturer of military jet aircraft. The new configuration would enable Kliper to increase range of its side maneuver from 500 to 2,000 kilometers and to terminate its flight at virtually any orbit with subsequent landing on a regular runway. However, an emergency escape during the launch accident would now require a controlled landing at the airport rather than a relatively simple descent under parachutes into a random location along the flight path. The main reason for the choice of wnged fuselage was the fact that with wings, Kliper can land at any Class I airport with the runway from 2.5 to 3.5 kilometers. The distance of run would be about two kilometers, and designers built in some reserve for accuracy of reaching a runway. In the winged version, only relatively small braking parachutes are considered. The landing will be accomplished in a fully automated mode. OKB Sukhoi
will be responsible for designing the system. Unlike Buran, a fully autonomous
navigation system is considered, which will use satellite navigation information. Inside the cabin, cushioning chairs for the crew should no longer rotate into a horizontal position to provide optimal conditions for landing. A fully reusbale spacecraft however, is much more difficult to develop initially. SYSTEMS DESCRIPTION Modular design It was clear from the line art released in November 2004, that a fully encapsulated crew compartment of the Kliper spacecraft could be mated to either a lifting-body or winged carrier platform, both designed as separate modules. Such architecture would probably allow a phased development of the vehicle, first as a lifting body and later as a winged spacecraft. Fuselage structure As of June 2005, designers still were looking at aluminum allows and titanium as construction materials for the main body of the craft. The main cabin of the spacecraft would be additionally covered with reusable thermal isolation layer and then with thermal protection layer. In the search for the ideal thermal protection system, Russian designers looked at the experience of the European Space Agency. Power supply system Designers abandoned traditional solar panels in favor of fuel cells,
which is essentially new for the Russian spacecraft, if not to count the
LOK spacecraft, which never flew fully equipped and with the crew onboard.
Thermal protection system Similary to the Shuttle, Kliper will carry three different types of thermal protection, for most critical, medium and light-heated regions of its body. The egnieers are still pondering the size of the thermal protective tiles.
The effort is to increase the size of individual tiles, in order to reduce
the total number of tiles and labor intencity requiered to maintain them.
Engineers now believe that size of tiles can be increased from the original
150 by 150 mm up to 300 by 300 mm. A single payload fairing, is planned to protect sensors extending from the service module of the spacecraft. It will be jettisoned after the launch-vehicle passes high-load area of atmospheric launch. In September 2005, Russian press reported that
RKK Energia contacted Plastik plant in Syzran, the manufacturer of composite
materials for
Russian rocket industry, on possible cooperation in the development of
the thermal protection system of the Kliper vehicle. Final decision on
the plant's participation in the program was expected at the end of 2005. Emergency escape and orbital insertion system Final orbit insertion is achieved by four firings of pairs of eight of emergency escape rockets. The engineers also re-introduced a truss-like structure designed to open during firing of the emergency escape system, and maintain stabilization in emergency, similar to one used on the Soyuz. Emergency engines deliver the spacecraft into the initial orbit with the altitude of around 200 kilometers. The spacecraft will then use eight brand-new 60-kilogram thrust engines to complete the orbit insertion. Due to their use for critical orbital insertion and deorbiting maneuver, the engine will have built-in redundancy, allowing successful operations with as many as two engines failed. To provide a simultaneuous separation of the PAO module and the habitation module, which both have separate interfaces connecting them to the reentry craft, engineers will have to guarantee flawless performance of the sepration system. To negate possible discrepencies in firing between the two, a flexible connectors are considered for integration into the transfer tunnel. Propulsion system (orbital maneuvering system) As of June 2005, RKK Energia looked at engines burning mix of ethanol and liquid oxygen for the main orbital maneuvering system. Launch system Igor Barmin said that the design of the launch complex in Kourou will allow to modify it for the manned launches with the Soyuz, however more significant upgrades of the infarstructure will be requiered to accomodate Kliper-carrying Onega booster. Russian company KBOM recieved its first money for the construction of the launch pad for the Soyuz rocket in Kourou. On April 26, 2005, the countdown started for 35 months, during which, the company has to have the launch complex, for final tests (kompleksnye ispytaniya). The real launch then can take place within two months, sometimes in 2008. The major difference from the Baikonur-based complex is vertical integration of the upper stage and the payload on the launch pad. This is due to impossibility of turning some of the payloads into horizontal position. To accomplish the task a movable service tower was introduced into the layout of the comkplex, which would be retracted shortly before launch. Barmin siad that this tower could potentially serve as the entry point for the crew to board the manned spacecraft. |
MULTIMEDIA GALLERY To purchase full-length animations and high-resolution versions of graphics and photography or to order custom-built 3D renderings contact Anatoly Zak
A scaled mockup of the winged version of the Kliper spacecraft, displayed during Paris Air Show in Le Bourget in June 2005. Copyright © 2005 Anatoly Zak
The configuration of the Kliper spacecraft released on November 30, 2004. Copyright © 2005 Anatoly Zak
Major elements of the Kliper spacecraft as of November 30, 2004. Click to enlarge: 300 x 234 pixels / 20K Copyright © 2005 Anatoly Zak
Artist interpretation of the Kliper reentry vehicle during landing. Click to enlarge: 400 x 302 pixels / 104K Copyright © 2004 Anatoly Zak
Scale model of the Yamal launcher (foreground), which will serve as a base for the Onega rocket. A two-stage version of the Zenit booster (shown on the background, not to the scale) would also be capable of launching the Kliper. Copyright © 2002 by Anatoly Zak |
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