{"schema": "too.foo.history.image-prompt.v1", "slug": "1937-04-12-frank-whittle-ground-tests-the-world-s-first-jet-engine-designed-to-p", "release": "4b157fe58dc3a255", "image_key": "1937-04-12-frank-whittle-ground-tests-the-world-s-first-jet-engine-designed-to-p", "image_sha256": "0b449348a9b35f9d21c4c620cffa5fe5228deb4008c66273390b29e4178521f9", "job": "20260827-004333-tier2", "model": "Ideogram 4 (fp8)", "preset": "V4_DEFAULT_20", "steps": 20, "seed": 20260823, "width": 1216, "height": 832, "caption_mode": "json", "caption": {"high_level_description": "Frank Whittle grips the inline fuel-valve lever and forces it against its closed stop while the complete WU turbojet continues running; irregular red-hot patches spread across the single combustion-chamber casing mid-run. Inside the British Thomson-Houston works at Rugby, 12 April 1937: a brick industrial test bay with oil-darkened concrete, high steel-framed windows, exposed conduit and a heavy fabricated test bed; nearby brickwork is soot-stained toward the exhaust side. The WU engine rests in steel saddles bolted to the test bed. All four test-bed feet contact the concrete and anchor through visible bolts. The fuel pipe is held against the bed by two clamps and joins the valve at both threaded ends. The valve's outlet pipe joins the combustion chamber; its lever touches the closed stop. Whittle's gloved fingers wrap fully around and contact the valve lever; his shoe soles meet the concrete. The engine outlet aligns concentrically with and joins the exhaust duct entering the brick aperture. Whittle is 1.73 m tall beside a roughly 2 m-long engine bed whose top reaches his waist. It is 12 April 1937: British engineer's dark wool suit, cotton shirt, loosened tie, leather work glove, sturdy leather shoes; fabricated carbon steel, cast metal housings, rigid metal fuel pipe, brick, concrete, oil-worn paint, leather; first-model complete Power Jets WU bench turbojet with centrifugal compressor, curved delivery ducts, single combustion chamber, turbine and mechanical fuel shutoff. Self-luminous cherry-red casing patches and restrained heat shimmer at the exhaust show the runaway; rotating machinery remains enclosed and fuel remains contained in the pipe.", "style_description": {"aesthetics": "Controlled human action against a machine still running away.. Documentary photographic realism: subtle film grain, believable wear on every material, candid imperfect framing.", "lighting": "Cool daylight from high windows upper left is the sole cast-shadow source; shadows fall lower right, with tight self-luminous red confined to the hot casing.", "photo": "45mm, f/3.5, 3.5 m from the fuel valve, Candid medium-wide side view, Whittle cropped slightly at left and engine off-centre right; nearest pipe softly blurred, valve and hot casing sharp, far brickwork defocused.", "medium": "photograph, Documentary photographic realism, subtle 1930s grain, short exposure freezing Whittle's grip while preserving localized thermal glow.", "color_palette": ["#1E1913", "#4A3B28", "#8A7350", "#C9B892", "#2B2B2A"]}, "compositional_deconstruction": {"background": "Inside the British Thomson-Houston works at Rugby, 12 April 1937: a brick industrial test bay with oil-darkened concrete, high steel-framed windows, exposed conduit and a heavy fabricated test bed; nearby brickwork is soot-stained toward the exhaust side. Cool daylight from high windows upper left is the sole cast-shadow source; shadows fall lower right, with tight self-luminous red confined to the hot casing.", "elements": [{"type": "obj", "bbox": [250, 355, 690, 940], "desc": "One roughly 2 m-long experimental turbojet: enclosed centrifugal-compressor body, broad curved ducts, single cylindrical combustion chamber and enclosed turbine, all fixed horizontally on the bed."}, {"type": "obj", "bbox": [285, 585, 510, 875], "desc": "The combustion casing carries three irregular dull cherry-red patches following its steel curvature; seams stay darker and directional heat discoloration surrounds each patch."}, {"type": "obj", "bbox": [500, 180, 610, 650], "desc": "One rigid 20 mm metal fuel pipe enters from lower left, held by two clamps to the bed, then runs through the valve into the chamber."}, {"type": "obj", "bbox": [470, 305, 570, 420], "desc": "One palm-sized steel shutoff valve inline with the pipe; its short lever is physically seated against the closed mechanical stop."}, {"type": "obj", "bbox": [130, 25, 930, 390], "desc": "One 1.73 m, 29-year-old engineer in rumpled dark wool suit and loosened tie, profile turned toward the engine; gloved right hand encloses the valve lever."}, {"type": "obj", "bbox": [590, 275, 855, 970], "desc": "Waist-high welded steel frame with four splayed feet bolted to concrete; paint is chipped around fasteners and oil darkens the floor beneath the compressor."}, {"type": "obj", "bbox": [350, 865, 650, 1000], "desc": "A matte steel duct aligns directly with the turbine outlet and enters a soot-darkened brick aperture; faint heat shimmer bends the far brick edges."}]}}, "rendered_input": "{\"high_level_description\": \"Frank Whittle grips the inline fuel-valve lever and forces it against its closed stop while the complete WU turbojet continues running; irregular red-hot patches spread across the single combustion-chamber casing mid-run. Inside the British Thomson-Houston works at Rugby, 12 April 1937: a brick industrial test bay with oil-darkened concrete, high steel-framed windows, exposed conduit and a heavy fabricated test bed; nearby brickwork is soot-stained toward the exhaust side. The WU engine rests in steel saddles bolted to the test bed. All four test-bed feet contact the concrete and anchor through visible bolts. The fuel pipe is held against the bed by two clamps and joins the valve at both threaded ends. The valve's outlet pipe joins the combustion chamber; its lever touches the closed stop. Whittle's gloved fingers wrap fully around and contact the valve lever; his shoe soles meet the concrete. The engine outlet aligns concentrically with and joins the exhaust duct entering the brick aperture. Whittle is 1.73 m tall beside a roughly 2 m-long engine bed whose top reaches his waist. It is 12 April 1937: British engineer's dark wool suit, cotton shirt, loosened tie, leather work glove, sturdy leather shoes; fabricated carbon steel, cast metal housings, rigid metal fuel pipe, brick, concrete, oil-worn paint, leather; first-model complete Power Jets WU bench turbojet with centrifugal compressor, curved delivery ducts, single combustion chamber, turbine and mechanical fuel shutoff. Self-luminous cherry-red casing patches and restrained heat shimmer at the exhaust show the runaway; rotating machinery remains enclosed and fuel remains contained in the pipe.\", \"style_description\": {\"aesthetics\": \"Controlled human action against a machine still running away.. Documentary photographic realism: subtle film grain, believable wear on every material, candid imperfect framing.\", \"lighting\": \"Cool daylight from high windows upper left is the sole cast-shadow source; shadows fall lower right, with tight self-luminous red confined to the hot casing.\", \"photo\": \"45mm, f/3.5, 3.5 m from the fuel valve, Candid medium-wide side view, Whittle cropped slightly at left and engine off-centre right; nearest pipe softly blurred, valve and hot casing sharp, far brickwork defocused.\", \"medium\": \"photograph, Documentary photographic realism, subtle 1930s grain, short exposure freezing Whittle's grip while preserving localized thermal glow.\", \"color_palette\": [\"#1E1913\", \"#4A3B28\", \"#8A7350\", \"#C9B892\", \"#2B2B2A\"]}, \"compositional_deconstruction\": {\"background\": \"Inside the British Thomson-Houston works at Rugby, 12 April 1937: a brick industrial test bay with oil-darkened concrete, high steel-framed windows, exposed conduit and a heavy fabricated test bed; nearby brickwork is soot-stained toward the exhaust side. Cool daylight from high windows upper left is the sole cast-shadow source; shadows fall lower right, with tight self-luminous red confined to the hot casing.\", \"elements\": [{\"type\": \"obj\", \"bbox\": [250, 355, 690, 940], \"desc\": \"One roughly 2 m-long experimental turbojet: enclosed centrifugal-compressor body, broad curved ducts, single cylindrical combustion chamber and enclosed turbine, all fixed horizontally on the bed.\"}, {\"type\": \"obj\", \"bbox\": [285, 585, 510, 875], \"desc\": \"The combustion casing carries three irregular dull cherry-red patches following its steel curvature; seams stay darker and directional heat discoloration surrounds each patch.\"}, {\"type\": \"obj\", \"bbox\": [500, 180, 610, 650], \"desc\": \"One rigid 20 mm metal fuel pipe enters from lower left, held by two clamps to the bed, then runs through the valve into the chamber.\"}, {\"type\": \"obj\", \"bbox\": [470, 305, 570, 420], \"desc\": \"One palm-sized steel shutoff valve inline with the pipe; its short lever is physically seated against the closed mechanical stop.\"}, {\"type\": \"obj\", \"bbox\": [130, 25, 930, 390], \"desc\": \"One 1.73 m, 29-year-old engineer in rumpled dark wool suit and loosened tie, profile turned toward the engine; gloved right hand encloses the valve lever.\"}, {\"type\": \"obj\", \"bbox\": [590, 275, 855, 970], \"desc\": \"Waist-high welded steel frame with four splayed feet bolted to concrete; paint is chipped around fasteners and oil darkens the floor beneath the compressor.\"}, {\"type\": \"obj\", \"bbox\": [350, 865, 650, 1000], \"desc\": \"A matte steel duct aligns directly with the turbine outlet and enters a soot-darkened brick aperture; faint heat shimmer bends the far brick edges.\"}]}}", "prompt_sha256": "c8ff29e9038e573ee79794137a8571e5f878035b6b8479d71b7bd09ccd0ca689"}