Some developing space programs use horizontal launcher assembly and launchpad loading
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A peer-reviewed study and reference data on the Ariane 6 show that some developing space programs utilize horizontal launcher assembly and launchpad loading.
Gaganyaan is an ambitious and recover safety mission for the Indian space program to launch humans into space. The success of the mission depends on the development of required technology and systems. A test vehicle is developed for the technological demonstration for all envisioned abort flight scenarios of Gaganyaan mission. A new configuration of launch vehicle with single liquid stage is planned for multiple flights. Coupled Loads analysis of launch vehicle system is a standard practice to estimate response and loads for the design of structures and generating sine vibration test levels. Usually a vehicle rests on the launch pad through base shroud with horizontal support and no vertical restraint. Upon ignition of the engine, thrust builds up and upon overcoming gravity the vehicle takes off. In the current analysis the launch vehicle is held in position using a holding / retracting mechanism and at a predefined time the vehicle is released. The boundary condition required a novel method to perform response analysis. The responses estimated from pre-flight analysis is correlated with flight response and a good correlation is observed. Additionally response analysis is performed at engine shut-off. Being the first flight, no flight data was available of engine thrust. In the current work, using an analytical thrust, responses are estimated. The analysis also helped in generating levels for vibration test of various sub-assemblies and payload.
sis]) is a European expendable launch system developed for the European Space Agency (ESA) and French Space Agency (CNES) and manufactured by a consortium
Ariane 6 (French: [aʁjan sis]) is a European expendable launch system developed for the European Space Agency (ESA) and French Space Agency (CNES) and manufactured by a consortium of European companies, led by the prime contractor ArianeGroup. As part of the Ariane rocket family, it is operated by Arianespace, replacing the Ariane 5. The project's primary contributors were France (55.3%), Germany
In November 2015, an updated design of Ariane 64 and 62 was presented, with new nose cones on the boosters, main stage diameter increased to 5.4 m (18 ft), and the height decreased to 60 m (200 ft).
The basic design for Ariane 6 was finalised in January 2016 as an expendable liquid-fuelled core stage plus expendable solid-rocket-boosters design. Development advanced into detailed design and production phases, with the first major contracts already signed. Unlike previous Ariane rockets, which are assembled and fuelled vertically before being transported to the launchpad, the Ariane 6 main stages were to be assembled horizontally at the new integration hall in Les Mureaux and then transported to French Guiana, to be erected and integrated with boosters and payload.
The horizontal assembly process was inspired by the Russian tradition for Soyuz and Proton launchers – which had more recently been applied to the American Delta IV and Falcon 9 boosters – with a stated goal of halving production costs.
The industrial production process was completely overhauled, allowing synchronized workflow between several European production sites moving at a monthly cadence, which would enable twelve launches per year, doubling Ariane 5's yearly capacity. To further lower the price, Ariane 6 engines were to use 3D printed components.
Reorganisation of the industry behind a new launch vehicle, leading to the creation of Airbus Safran Launchers (ASL), also started a review by the French government into tax matters, and the European Commission over a possible conflict of interest if Airbus Defence and Space, a satellite manufacturer, were to purchase launches from ASL.
While development was initially slated to be substantially complete in 2019, with an initial launch in 2020, the initial launch date has slipped several times: first to 2021, then to 2022, then to 2023, and then to 2024. In October 2022, Arianespace expected the maiden flight to occur in 2023, although in December 2023, Arianespace once again set the flight to occur on 15 June 2024. In June 2024, ESA Executive said its first launch was postponed to July 9th 2024. The maiden flight VA262 took place 9 July 2024 and…
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