{"id":2819,"date":"2025-12-14T20:23:40","date_gmt":"2025-12-14T19:23:40","guid":{"rendered":"https:\/\/innovativepropulsionlab.fr\/?page_id=2819"},"modified":"2025-12-14T21:36:39","modified_gmt":"2025-12-14T20:36:39","slug":"redwing","status":"publish","type":"page","link":"https:\/\/innovativepropulsionlab.fr\/en\/redwing\/","title":{"rendered":"Redwing"},"content":{"rendered":"
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REDWING<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Design and test of a rocket engine - Race2Space 2026<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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7600N (1700 lbf) of thrust<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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50 bar (725 psi) of chamber pressure<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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LOX\/Isopropanol<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Impinging injector<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Regenerative cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Film cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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7600N (1700 lbf) of thrust<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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50 bars en chambre<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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LOX\/Isopropanol<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Impinging injector<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Regenerative cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Film cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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7600N (1700 lbf) of thrust<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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50 bars en chambre<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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LOX\/Isopropanol<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Impinging injector<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Regenerative cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Film cooling<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t

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After the success of Arrax, we are now developing Redwing: a 7.6 kN LOX\/isopropanol engine designed to achieve significantly higher efficiency and to use the fuel as a cooling fluid. Intended for testing at the Race2Space competition, this engine is the most ambitious project undertaken by the association to date.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Higher performance, higher heat flux<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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All other things equal, one of the main drivers of rocket engine efficiency is its chamber pressure, which influences how fast the propellants exit the nozzle, and therefore how much thrust is generated by a given flow rate of propellants. With Redwing, one of our main goals is to increase the efficiency (specific impulse) of the engine, which is why we opted for a five-fold increase in chamber pressure compared to Arrax, a bold decision that comes with many additional difficulties, especially regarding cooling.
Overall, we are hoping to achieve at least 230 seconds of Isp, and perhaps even as high as 250 s. The testing facility at Airborne Engineering Limited which we hope to be able to use during Race2Space 2026 will enable us to accurately measure the performance of this engine.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Injector plate<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Regenerative cooling<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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To maximize engine performance, the design choice was made to use impinging injectors with OFO triplets (Oxidizer\u2013Fuel\u2013Oxidizer), meaning that two oxidizer jets impinge on a single fuel jet. This type of element is highly valued for its high performance, as it enables excellent propellant mixing and very effective atomization (i.e., breaking the propellants into fine droplets). Comprising 36 triplets uniformly distributed across the injector plate, along with 24 peripheral fuel orifices that protect the chamber wall from the hot, oxidizing combustion core, this injector design represents a major first for the association.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Regenerative cooling<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Unlike its predecessor Arrax, Redwing is cooled exclusively by the fuel and does not require any water cooling. Instead of being routed directly to the injector plate, the fuel is supplied to the engine at the nozzle. Each second, 1.4 kg of isopropanol flows through the cooling channels, absorbing the heat generated by combustion and keeping the wall temperature below 500 \u00b0C, while the hot gas temperature in the chamber exceeds 3,000 \u00b0C!<\/p>

In addition, the introduction of PDMS (polydimethylsiloxane) into the fuel leads to the formation of protective silica deposits at the hottest points of the wall, further reducing the heat flux into the structure. By combining regenerative cooling with film cooling and the use of PDMS, the engine can, in theory, survive indefinitely under a heat flux exceeding 850 kW (enough to bring 1 liter of water at 20 \u00b0C to a boil in 3 seconds) transferred to the wall.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

REDWING Conception et test d’un moteur-fus\u00e9e RACE2SPACE 2026 7600N de pouss\u00e9e 50 bar en chambre LOX\/Isopropanol Injecteur \u00e0 impact Refroidissement r\u00e9g\u00e9n\u00e9ratif Film cooling 7600N de pouss\u00e9e 50 bars en chambre LOX\/Isopropanol Injecteur \u00e0 impact Refroidissement r\u00e9g\u00e9n\u00e9ratif Film cooling 7600N de pouss\u00e9e 50 bars en chambre LOX\/Isopropanol Injecteur \u00e0 impact Refroidissement r\u00e9g\u00e9n\u00e9ratif Film cooling Apr\u00e8s le […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2819","page","type-page","status-publish","hentry","entry"],"yoast_head":"\nRedwing - Innovative Propulsion Laboratory<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/innovativepropulsionlab.fr\/en\/redwing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Redwing - 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