{"product_id":"apollo-pintle-injector-sweatshirt","title":"Apollo Pintle Injector Sweatshirt","description":"\u003cp\u003e\u003cstrong\u003eDesign\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTo land on the Moon, the Lunar Module's descent engine had to throttle smoothly from full power down to a gentle hover. TRW solved it with a variable-area pintle injector. Oxidizer (nitrogen tetroxide) flowed down the centre and out past a fixed pintle as a ring of individual sprays. Fuel (Aerozine 50) left the faceplate as a thin cylindrical sheet, and the oxidizer sprays broke it up and mixed with it. A movable sleeve, linked to the flow control valves, changed the size of both openings at the same time, so the mixture stayed right at every thrust setting.\u003c\/p\u003e\n\u003cp\u003eThe engine throttled between 10% and 60% of its 10,500 lbf maximum, or ran at full thrust; the range between 65% and 92.5% was avoided to protect the nozzle. On Apollo 13 the same engine pushed the crippled spacecraft back towards Earth. The pintle injector design later went into SpaceX's Merlin engines.\u003c\/p\u003e\n\u003cp\u003eThis design shows the engine in half-section, with Detail A drawing out the injector: the fixed pintle, the movable sleeve and the two propellant paths.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eItem\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA classic sweatshirt refined for everyday wear. Built without side seams for a clean silhouette and reduced fabric waste, finished with a durable ribbed knit collar that keeps its shape over time. The fit is relaxed yet structured, designed for all-day comfort. Crafted from ethically grown US cotton and dyed with OEKO-TEX certified colors for a responsible footprint.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCare instructions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- Non-chlorine: bleach as needed\u003cbr\u003e- Do not iron\u003cbr\u003e- Do not dryclean\u003cbr\u003e- Machine wash: cold (max 30C or 90F)\u003cbr\u003e- Tumble dry: low heat\u003c\/p\u003e","brand":"Printify","offers":[{"title":"Black \/ M","offer_id":47891015368902,"sku":"53586613845964308846","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":47891015532742,"sku":"75819318194369277047","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":47891015696582,"sku":"23328467543562289786","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":47891015860422,"sku":"25258478431124770835","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":47891015958726,"sku":"30632666962240859575","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":47891015991494,"sku":"17747404447903966687","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ S","offer_id":47891015205062,"sku":"83309302401519448700","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ M","offer_id":47891015270598,"sku":"10262405209244237853","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ L","offer_id":47891015434438,"sku":"21845728838991130299","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ XL","offer_id":47891015598278,"sku":"32371894132440537074","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ 2XL","offer_id":47891015762118,"sku":"29009523337972292500","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ 3XL","offer_id":47891015893190,"sku":"28897827934708328086","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sand \/ S","offer_id":47891015106758,"sku":"26802112309388509358","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sport Grey \/ M","offer_id":47891015303366,"sku":"35701294482122709121","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sport Grey \/ L","offer_id":47891015467206,"sku":"31930397900486129506","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sport Grey \/ XL","offer_id":47891015631046,"sku":"10558548795124692938","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sport Grey \/ 2XL","offer_id":47891015794886,"sku":"22268156239877333949","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Sport Grey \/ S","offer_id":47891015139526,"sku":"21537810478546879831","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Navy \/ M","offer_id":47891015237830,"sku":"11001623845880986479","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Navy \/ L","offer_id":47891015401670,"sku":"99405371297189392518","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Navy \/ XL","offer_id":47891015565510,"sku":"32349323410935261380","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Navy \/ 2XL","offer_id":47891015729350,"sku":"20025978026723033096","price":69.0,"currency_code":"USD","in_stock":true},{"title":"Navy \/ S","offer_id":47891015073990,"sku":"22058166356559202354","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":47891015336134,"sku":"23647221177527721111","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ L","offer_id":47891015499974,"sku":"11035417633400762741","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ XL","offer_id":47891015663814,"sku":"28959725241179487807","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 2XL","offer_id":47891015827654,"sku":"26517698226737578096","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 3XL","offer_id":47891015925958,"sku":"21754872413991470757","price":69.0,"currency_code":"USD","in_stock":true},{"title":"White \/ S","offer_id":47891015172294,"sku":"98637852383165858772","price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/4424\/5446\/files\/18404156760837953696_2048.jpg?v=1790435499","url":"https:\/\/mach25.co\/products\/apollo-pintle-injector-sweatshirt","provider":"Mach 25","version":"1.0","type":"link"}