Analysis of information sources in references of the Wikipedia article "Raptor (moteur-fusée)" in French language version.
« [initial flight testing will be with] a full-scale ship doing short hops of a few hundred kilometers altitude and lateral distance... fairly easy on the vehicle, as no heat shield is needed, we can have a large amount of reserve propellant and don’t need the high area ratio, deep space Raptor engines... 'The engine thrust dropped roughly in proportion to the vehicle mass reduction from the first IAC talk,' Musk wrote when asked about that reduction in thrust. The reduction in thrust also allows for the use of multiple engines, giving the vehicle an engine-out capability for landings... Musk was optimistic about scaling up the Raptor engine from its current developmental model to the full-scale one. 'Thrust scaling is the easy part. Very simple to scale the dev Raptor to 170 tons,' he wrote. 'The flight engine design is much lighter and tighter, and is extremely focused on reliability.' He added the goal is to achieve 'passenger airline levels of safety' with the engine, required if the vehicle is to serve point-to-point transportation markets. »
« SpaceX is in the midst of a variety of ambitious engine programmes, including the Merlin 2, a significant modification of the Merlin 1 series, and the Raptor upper stage engine. Details of both projects are tightly held. »
« Musk said Lox and methane would be SpaceX’s propellants of choice on a mission to Mars, which has long been his stated goal. SpaceX’s initial work will be to build a Lox/methane rocket for a future upper stage, codenamed Raptor. The design of this engine would be a departure from the “open cycle” gas generator system that the current Merlin 1 engine series uses. Instead, the new rocket engine would use a much more efficient “staged combustion” cycle that many Russian rocket engines use. »
« The new Raptor upper stage engine is likely to be only the first engine in a series of lox/methane engines. »
« After completing successful test series in 2014 and 2015 on components for the new Raptor rocket engine being developed by SpaceX, there also is hope for additional test agreements with the company. »
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.« "We are going to do methane." Musk announced as he described his future plans for reusable launch vehicles including those designed to take astronauts to Mars within 15 years, "The energy cost of methane is the lowest and it has a slight Isp (Specific Impulse) advantage over Kerosene," said Musk adding, "And it does not have the pain in the ass factor that hydrogen has". »
« Musk stated it’s possible that the first spaceship would be ready for tests in four years... 'We’re kind of being intentionally fuzzy about the timeline,' he said. 'We’re going to try and make as much progress as we can with a very constrained budget.' »
« [initial flight testing will be with] a full-scale ship doing short hops of a few hundred kilometers altitude and lateral distance... fairly easy on the vehicle, as no heat shield is needed, we can have a large amount of reserve propellant and don’t need the high area ratio, deep space Raptor engines... 'The engine thrust dropped roughly in proportion to the vehicle mass reduction from the first IAC talk,' Musk wrote when asked about that reduction in thrust. The reduction in thrust also allows for the use of multiple engines, giving the vehicle an engine-out capability for landings... Musk was optimistic about scaling up the Raptor engine from its current developmental model to the full-scale one. 'Thrust scaling is the easy part. Very simple to scale the dev Raptor to 170 tons,' he wrote. 'The flight engine design is much lighter and tighter, and is extremely focused on reliability.' He added the goal is to achieve 'passenger airline levels of safety' with the engine, required if the vehicle is to serve point-to-point transportation markets. »
« Raptor uses those spark plugs to ignite its ignition sources [forming] full-up blow torches... —likely miniature rocket engines using the same methane and oxygen fuel as Raptor—then ignite the engine’s methane and oxygen preburners before finally igniting those mixed, high-pressure gases in the combustion chamber. »
.« "We are going to do methane." Musk announced as he described his future plans for reusable launch vehicles including those designed to take astronauts to Mars within 15 years, "The energy cost of methane is the lowest and it has a slight Isp (Specific Impulse) advantage over Kerosene," said Musk adding, "And it does not have the pain in the ass factor that hydrogen has". »
« Raptor uses those spark plugs to ignite its ignition sources [forming] full-up blow torches... —likely miniature rocket engines using the same methane and oxygen fuel as Raptor—then ignite the engine’s methane and oxygen preburners before finally igniting those mixed, high-pressure gases in the combustion chamber. »