================================================================================ GLITCHY MATRIX EVALUATION FILE Project Blue Book - Incident #152 ================================================================================ PDF SOURCE: 1948-07-6387196-Indianapolis-Indiana-152-.pdf EVAL GENERATED BY: Claude Sonnet 4.6 for GlitchyMatrix.com/bluebook/ ================================================================================ COMPANION CASE NOTE: This case should be read alongside Incident #151 (29 July 1948, Indianapolis). The two cases were explicitly linked by the original investigators and by Dr. Hynek, who placed both in the same highest-priority category (3b: "Evidence offered suggests no explanation"). See SECTION 3 for detailed comparison. The #151 GM Analysis eval file contains further context. ================================================================================ SECTION 1: TRANSCRIPTION OF SOURCE DOCUMENTS ================================================================================ --- DOCUMENT 1: ATIC FORM 329 (Temporary) --- Classification: [formerly RESTRICTED, now UNCLASSIFIED] Header: PROJECT 10073 RECORD (partial stamp visible) Incident #: 152 ATIC NO.: [blank] AF NO.: [blank] REPORT NO.: [blank] DATE OF REPORT: [blank] TIME OF SIGHTING: 0825 SHAPE: Like Cymbal SIZE: 20' Diam. & 6'-8' height COURSE: 90 degrees -- East NO. IN GROUP: 1 SOUND: [blank] PHOTOS: ---- SKETCHES: ---- Form Reference: Temporary ATIC Form 329 (2 Jan 52) DATE OF INFO: 31 July 1948 LOCATION: Indianapolis, Indiana SOURCE: Civilian DATE IN TO ATIC: [blank] COLOR: White with no Shine SPEED: 1800 MPH [Estimated] ALTITUDE: 2,000' [Estimated/Measured field partially legible] LENGTH OF TIME OBS: Approx 10 Seconds TYPE OF OBSERVATION: Ground MANEUVERS: ---- Hand-written notation at bottom right of form: "Unidentified" --- DOCUMENT 2: DIAGRAM OF OBJECT SIGHTED --- Classification: UNCLASSIFIED Signed by: Russell J. Carey Jr., 1st Lt., USAF, Intelligence Officer File stamp: 9014 (same series as the #151 file) Shape description from diagram: The object is depicted as a CYMBAL or disc-with-dome shape in profile: - Convex upper surface (dome/raised center) - Concave or curved lower surface - Widest at the midsection, tapering toward what appear to be edges - The overall silhouette resembles a classic "flying saucer" or two shallow bowls joined at their rims, with the upper bowl being more prominent Dimensions annotated: - Width (at widest, annotated at top): 6 to 8 feet - Height/diameter (vertical dimension, annotated on side): 20 feet - Text annotation: "(Ratio approx. 3:1)" - Arrow with label: "NOTED SHADOW" pointing to the underside/lower surface of the object, indicating the investigator or witness observed visible shadow/shading on the underside, consistent with a three- dimensional object in sunlight. NOTE ON ORIENTATION: The dimensions "20 feet" and "6 to 8 feet" appear to describe the object in terms of diameter (wide dimension) = 20 feet and height (vertical extent at center) = 6 to 8 feet. The 3:1 ratio refers to diameter-to-height. This is consistent with the checklist and narrative descriptions. This diagram was produced by the same Lt. Carey who investigated Incident #151 and drew that diagram as well. Carey had firsthand knowledge of how both witnesses described their respective objects. --- DOCUMENT 3: HYNEK'S EVALUATIONS (from Project Grudge Report) --- [Same document as appears in the Incident #151 file -- Incident Index] Incident #152 appears in Category 3b: "Non-astronomical, with no explanation evident -- Evidence offered suggests no explanation" Listed among: #1, 2, 10, 17, 21, 29, 37, 40, 51, 52, 58, 61, 62, 64, 68, 71, 75, 76, 77, 79, 84, 105, 111, 122, 135, 151, [152], 154, 162, 168, 172, 176, 183, 186, 193, 207, 215, 223, 224, 225, 228, 227, 238, 241, 242, 243, 244, 134. Note that Incidents 151 and 152 appear consecutively in this list. --- DOCUMENT 4: HYNEK'S INDIVIDUAL CASE ANALYSIS --- Classification: UNCLASSIFIED "Incident #152 -- Indianapolis, Indiana -- 31 July 1948 There is no astronomical explanation for the object observed in this incident. See report on incident #151 for discussion." [This brief note cross-references his full analysis in the #151 file, where he linked both incidents as "the most tangible... and most difficult to explain away as sheer nonsense" in the entire Project Grudge sample.] --- DOCUMENT 5: COMBINED INVESTIGATOR'S MEMO (covering both incidents) --- Classification: UNCLASSIFIED "Incident #151 -- Indianapolis, Indiana -- 29 July 1948 This incident and #152 are being considered together by this investigator, because they both occurred in Indianapolis, were separated by just two days, were observed at approximately the same time of day, and include certain similarities of description. Both incidents are clearly non-astronomical. Drawings are available for both objects observed, and although they are considerably different, they might conceivably represent the same object viewed on edge and in plan. Both have approximately the same shape, although the scale given by one observer is about three times that given by the other. Both have 3:1 ratios of length to width. If these objects were real, it seems to be straining coincidence too far to assume that they were entirely independent of each other. Were there by any chance some special glider experiments going on in the vicinity of Indianapolis at that time? Barring hallucinations, these two incidents and incidents #17, 40, 75, and 84 seem to be the most tangible, from the standpoint of description, of all those reported, and the most difficult to explain away as sheer nonsense. It should be noted that both incidents #151 and 152 had two observers." --- DOCUMENT 6: INCIDENT SUMMARY NARRATIVE --- Classification: UNCLASSIFIED "Incident No. 152 -- 31 July 1948, 0825 Hours, Indianapolis, Indiana. A man and his wife saw an object shaped like a cymbal, lusterless white in color, at an altitude of 2000 ft. The object moved across the sky to the east at approximately 1800 MPH, on a level course and shimmering in the sun, giving the appearance of spinning. It was twenty feet in diameter and six to eight feet high in the center. There was no sound or exhaust." AMC Opinion: "This object could conceivably be the same at different angles as that seen in Incident 151, although all the remaining evidence is widely divergent. No satisfactory conclusion can be drawn." --- DOCUMENT 7: PROJECT GRUDGE APPENDIX LISTING --- Classification: UNCLASSIFIED (Same document as in #151 file -- covers both cases) The page lists the remaining unexplained incidents, with Incident #152 circled in the appendix list. The full list includes: 1, 10, 17, 21, 29, 35, 37, 40, 51, 58, 62, 64, 68, 71, 75, 76, 77, 79, 84, 111, 122, 134, 135, 151, [152], 154, 162, 163, 176, 183, 186, 193, 207, 215, 216. --- DOCUMENT 8: CHECKLIST - UNIDENTIFIED FLYING OBJECTS --- Incident #: 152 1. Date: 31 July 48 2. Time: 0825 3. Location: Indianapolis, Indiana (South-Central part) 4. Name of observers: Mr. & Mrs [REDACTED] 5. Occupation of observers: [REDACTED] an electrician and housewife 6. Address of observers: [REDACTED], Indianapolis, Indiana 7. Place of observation: As above (home address) 8. Number of objects: 1 9. Distance of object: N/S 10. Time in sight: 10 seconds 11. Altitude: 2,000 ft 12. Speed: 1800 MPH 13. Direction of flight: 90 degrees -- east 14. Tactics: N/S 15. Sound: None 16. Size: [REDACTED] -- 20 ft in dia. and approx 6 to 8 ft in height in center -- Ratio about 3:1 17. Color: White with no shine 18. Shape: Like a cymbal 19. Odor detected: N/S 20. Apparent construction: N/S 21. Exhaust trails: None 22. Weather conditions: Sky clear 23. Effect on clouds: N/S 24. Sketches or photographs: 1 25. Manner of disappearance: N/S 26. Remarks: (over) Checklist Reverse (Remarks): "Object first perceived in the west. The object was shaped like a cymbal with smooth surfaces and approximately 20 feet in diameter at the base and approximately 6 to 8 feet in height at the center. Ratio was about 3:1. It appeared to be flat white in color with no shine. It traveled extremely fast crossing the sky in approximately 10 seconds (a distance of about 5 miles) on a 90 degree heading. It maintained a level course and shimmered in the sun giving the appearance of spinning. The altitude was estimated at approximately 2,000 ft. Object made no discernible sound and left no exhaust trail. No openings were noted on the object. NOTE: Mr. [REDACTED] was standing by open bathroom window which faces the west when he was attracted by the object in the sky. Couldn't believe his eyes. He rushed into adjoining kitchen and showed his wife the object thru the kitchen window facing south. He [REDACTED] stated the object appeared large enough to carry one person. NOTE: Investigation conducted by Intel Officer, 1st Lt Russell J. Carey, Jr., on a call from Mr. [REDACTED]. It was noted that visibility was good from both windows for such observation. No other reports received on this object." --- DOCUMENT 9: HQ REPORT ON FLYING DISC (from Stout Field) --- Classification: UNCLASSIFIED From: HQ 331st Air Force Base Unit (Res Tng) Stout Field, Indianapolis 6, Indiana Date: 3 August 1948 To: Commanding General, Air Materiel Command Wright-Patterson Air Force Base, Dayton, Ohio ATTN: TSDIN Subject: Report on "Flying Disc" Signed by: James A. Ronin, Colonel USAF, Commanding (same as #151) (1) Sighted at approximately 0825 hours on 31 July 1948 in the South central part of the city of Indianapolis, Ind. (2) Sky was clear at time of sighting. (3) Witnessed by Mr. and Mrs. [REDACTED] St., Indianapolis, Indiana. Mr. [REDACTED] is an electrician. (4) No photographs available. (5) Sketch of object attached. (6) Object sighted: (a) One (1) (b) Shaped like a cymbal with smooth surfaces. (c) Approximately twenty (20) feet in diameter at the base and approximately six (6) feet to eight (8) ft in height at center. Ratio about 3:1. (d) Appeared to be flat white in color with no shine. (e) Traveling extremely fast, crossing the sky (a distance of about five (5) miles) in approximately ten (10) seconds. (f) Heading ninety degrees (90 degrees). (g) Object maintained a level course and shimmered in the sun giving the appearance of spinning. (h) Altitude of the object estimated at approximately two thousand (2000) feet. (i) Made no discernable sound. (j) No exhaust trail. (7) Mr. [REDACTED] was standing by open bathroom window, which faces West, and was shaving when attracted by the object in the sky. Couldn't believe his own eyes so he rushed into adjoining kitchen and showed wife the object through kitchen window facing South. Mr. [REDACTED] stated the object appeared large enough to carry one person. [No openings] were noted on the object. Investigation conducted by the... [Continuation page:] "...Intelligence Officer, 1st Lt. Russell J. Carey Jr. on a call from Mr. [REDACTED]. On the investigation, it was noted that the visibility was good from both windows for such an observation. No other reports were received on this object." 1 Incl: Diagram of Object Sighted ================================================================================ SECTION 2: SEARCH INDEX TERMS ================================================================================ INCIDENT DATA: incident-152, incident-151, project-sign, project-grudge, ATIC-form-329, unidentified, category-3b, no-explanation-evident, companion-case, Indianapolis-1948, Indianapolis-double-event LOCATION: Indianapolis, Indiana, South-Central-Indianapolis, Stout-Field, Indianapolis-6, 46201, 46202, 46203, 46204 DATE / TIME: July-1948, 31-July-1948, 1948, 0825-hours, morning-sighting, two-days-after-incident-151 OBJECT DESCRIPTION: cymbal-shape, disc-shape, flying-saucer-shape, dome, lusterless-white, flat-white, no-shine, 20-feet-diameter, 6-8-feet-height, 3:1-ratio, 1800-mph, supersonic, no-sound, no-exhaust, level-course, shimmering, spinning-appearance, smooth-surfaces, no-openings, shadow-noted, large-enough-to-carry-one-person, heading-east, 90-degrees, 2000-feet WITNESSES: two-witnesses, married-couple, electrician, housewife, bathroom-window, kitchen-window, civilian-witnesses INVESTIGATORS / PERSONNEL: Lt-Russell-J-Carey-Jr, Col-James-A-Ronin, Dr-Hynek, J-Allen-Hynek, 331st-AFBU, Stout-Field ORGANIZATIONS: Air-Materiel-Command, Project-SIGN, Project-Grudge, Wright-Patterson-AFB, Stout-Field, TSDIN COMPANION CASE: incident-151, propeller-shape, same-object-different-angles, 3:1-ratio, same-investigator, Indianapolis-wave, two-day-interval HYPOTHESES: same-object-different-angles, glider-experiments, edge-on-vs-plan-view, supersonic-no-sonic-boom OUTCOME: officially-unidentified, no-satisfactory-conclusion, category-3b, Hynek-highest-priority, widely-divergent-evidence, both-had-two-observers ================================================================================ SECTION 3: GM ANALYSIS ================================================================================ -- Glitch N. Matrix | GlitchyMatrix.com | AI Assessment -- -- Claude Sonnet 4.6 | Project Blue Book Archive Evaluation -- ================================================================================ CASE OVERVIEW: On the morning of 31 July 1948, at 0825 hours, a married couple in the South-Central part of Indianapolis -- the husband was shaving in the bathroom -- were startled by an object crossing the sky to the east. The husband couldn't believe his eyes; he ran to get his wife and they watched it together through the kitchen window facing south. The sighting lasted approximately 10 seconds. The object was white, cymbal-shaped, 20 feet in diameter, six to eight feet high at the center, moving at an estimated 1,800 miles per hour at roughly 2,000 feet altitude. No sound. No exhaust. No openings visible. The husband said it looked large enough to carry one person. Lt. Russell J. Carey Jr. investigated on a call from the witness. He noted that visibility was good from both windows. He drew the diagram of the object, signed it, and filed it at Stout Field. Two days earlier, Carey had investigated Incident #151 -- the propeller-shaped object at the Fall Creek bridge northeast of the city. He was now looking at descriptions of two distinctly shaped objects in the same city within 48 hours of each other. The case was classified UNIDENTIFIED. Dr. Hynek placed it in his highest priority category alongside #151. The AMC Opinion was identical: no satisfactory conclusion can be drawn. THE 3:1 RATIO ACROSS BOTH CASES: The analytical thread that links Incidents #151 and #152 most specifically is the 3:1 ratio of primary dimension to secondary dimension: INCIDENT #151: 6-8 feet long propeller blades, 1.5-2 feet wide = 3:1 to 4:1 INCIDENT #152: 20 feet diameter, 6-8 feet height = approximately 3:1 The investigator's memo explicitly called out this shared ratio: "Both have 3:1 ratios of length to width." And then drew the logical inference: drawings considerably different but might conceivably represent the same object viewed on edge and in plan. This geometric hypothesis is worth taking seriously. If you have a cymbal- shaped disc (the #152 shape) and view it from the side while it is slightly tilted, you see a curved profile that shows the two lobes of the disc face -- which could register perceptually as two broad blade shapes (the #151 propeller description). Conversely, a propeller-like rotating shape viewed from below while it banks or rotates could present as a circular disc with a raised center. The two drawings, while clearly different, share the 3:1 ratio the investigator noted. THE SPEED PROBLEM: 1,800 MPH AT 2,000 FEET WITH NO SONIC BOOM: This is the most analytically striking element of Incident #152, and it deserves careful treatment. The witness estimated the object crossed approximately 5 miles of sky in approximately 10 seconds. The arithmetic: 5 miles / (10/3600 hours) = 1,800 mph. The speed report is internally consistent. At sea level, the speed of sound is approximately 760 mph. At 2,000 feet, it's essentially the same. An object traveling at 1,800 mph would be Mach 2.4 -- well into supersonic flight. The first thing a Mach 2.4 object at 2,000 feet altitude would produce over a residential neighborhood is a SONIC BOOM. Not a faint sound -- a building-rattling concussive wave. The witness was in his own bathroom with the window open. His wife was in the kitchen. They would have heard it. They heard nothing. POSSIBLE RESOLUTIONS: 1. DISTANCE/SPEED ESTIMATION ERROR: The 5-mile estimate is the witness's approximation of how far the object traveled while he watched it. If the actual distance was 1 mile (not 5) in 10 seconds, the speed would be 360 mph -- fast but subsonic, and the absence of a sonic boom would be unremarkable. However, from a residential location in South-Central Indianapolis at 2,000 feet altitude, a 5-mile angular traverse is plausible if the object was traveling at a high angle across the observer's field of view. The investigators apparently did not challenge this estimate. 2. ALTITUDE ESTIMATION ERROR: If the object was actually at much higher altitude -- say 20,000 feet -- then both the distance estimate and the apparent size would need revision, and the sonic boom at altitude might not have reached the ground clearly. But an object at 20,000 feet that appeared 20 feet in diameter close enough to note "no openings" would be implausibly large. The 2,000-foot estimate seems consistent with the detail observed. 3. THE OBJECT WAS NOT A CONVENTIONAL AIRCRAFT: If we accept the report as described -- Mach 2.4 at 2,000 feet, no sound -- this rules out any conventional propulsion system available in 1948 or since. A jet aircraft at that speed and altitude would shake windows for miles. The absence of sound at this speed is an anomaly that conventional physics cannot comfortably accommodate. 4. THE SAME OBJECT AT MUCH LOWER SPEED: If the #151 and #152 objects are the same craft, the speed discrepancy is enormous: 25-30 mph vs. 1,800 mph. This could be reconciled if the object can vary its speed dramatically -- which is itself anomalous -- or if one speed estimate is substantially wrong. The no-sound-at-supersonic-speed anomaly was noted but not analyzed in the official record. It is one of the most physically challenging aspects of this case. THE SAME INVESTIGATOR, BOTH CASES: Lt. Russell J. Carey Jr. investigated both Incident #151 on or around August 3, 1948, and Incident #152 (also reported August 3). He drew the diagrams for both cases, signed them, and filed them. No other figure in the Blue Book record had direct personal knowledge of how both witnesses described their respective objects. His observation in the analytical memo that the two drawings "might conceivably represent the same object viewed on edge and in plan" carries weight precisely because he had looked at both sketches and interviewed or received testimony from the witnesses in both cases. This was not armchair analysis -- it was the trained observation of the investigating officer. THE WITNESS REACTION: "COULDN'T BELIEVE HIS EYES": This phrase appears in both the checklist and the Stout Field letter. It was apparently direct testimony. The witness -- an electrician, presumably familiar with industrial machinery and not easily startled -- was startled enough to run to his wife. The reaction suggests the object was sufficiently unusual that his first instinct was to seek confirmation. The detail that he said it "appeared large enough to carry one person" is notable. The object was 20 feet in diameter and 6-8 feet high -- a reasonable scale for a piloted craft. The witness made this observation unprompted. It is recorded in both the checklist and the formal report. It was not the standard response in a sighting report form of this era. COMPARING #151 AND #152 -- THE KEY DIFFERENCES: The AMC Opinion noted the remaining evidence is "widely divergent" despite the possible same-object hypothesis. Here is what diverges: FEATURE | INCIDENT #151 | INCIDENT #152 ----------------|-------------------------|--------------------------- Date | 29 July 1948 | 31 July 1948 Time | 0955 | 0825 Location | NE Indianapolis | South-Central Indianapolis Shape | Broad short propeller | Cymbal (disc with dome) Color | Aluminum, shiny | White, no shine / lusterless Speed | 25-30 MPH | ~1,800 MPH Altitude | 30 feet | 2,000 feet Course | South | East (90 degrees) Duration | Longer observation | Approx 10 seconds Maneuvers | Gliding, no spinning | Shimmer/apparent spinning Observers | Two (rug cleaning crew) | Two (married couple, home) Cups/detail | Yes (cups on blades) | Smooth surfaces, no openings FEATURE | INCIDENT #151 | INCIDENT #152 ----------------|-------------------------|--------------------------- Similarities: Sound | None | None Exhaust | None | None No. of objects | 1 | 1 Observer count | 2 | 2 Investigator | Lt. Carey | Lt. Carey City | Indianapolis | Indianapolis Aspect ratio | ~3:1 | ~3:1 Weather | Clear | Clear The differences are substantial and the similarities are notable. The AMC's "widely divergent" assessment is honest -- these are not the same case with minor variation. But the investigator's geometric hypothesis and the shared aspect ratio remain intriguing. WHAT THE OFFICIAL CONCLUSION GOT RIGHT: Both "No satisfactory conclusion can be drawn" and the Category 3b Hynek classification are accurate. The case is straightforward in its strangeness: a white, cymbal-shaped, dome-topped disc, 20 feet across, traveling east at an estimated supersonic speed over Indianapolis at 2,000 feet, making no sound. Two credible witnesses, the husband seeking his wife's confirmation. The investigating officer took the report seriously enough to draw the diagram himself. The connection to Incident #151 two days earlier, same city, was noted and explicitly left unresolved. WHAT WAS MISSED OR UNDEREXPLORED: The sonic boom anomaly was not analyzed. If the speed estimate is taken at face value, the absence of a sonic boom is a physical impossibility with any known 1948 propulsion system. This deserved explicit acknowledgment. The investigator's question -- "Were there by any chance some special glider experiments going on in the vicinity of Indianapolis at that time?" -- was never formally answered in the record. Gliders don't travel at 1,800 mph, but the question may have been aimed at a more general "classified experiment" inquiry that was standard practice. No search of the area was conducted, unlike in Incident #151 where Lt. Hoskins and Carey physically searched the wooded Fall Creek area. In #152, the object crossed 5 miles of sky in 10 seconds and was gone. There was nothing to search. WHAT MAKES THIS CASE NOTABLE: 1. THE SONIC BOOM PARADOX: An object estimated at Mach 2.4 at 2,000 feet over a residential neighborhood, observed through an open window, produced no discernible sound. This single fact is physically extraordinary. It separates this case from any conventional 1948 aircraft explanation regardless of how generously one interprets the speed estimate. 2. THE COMPANION RELATIONSHIP WITH #151: Two Indianapolis sightings separated by 48 hours, both with two witnesses, both in morning hours, both investigated by the same officer, both classified UNIDENTIFIED, both placed by Hynek in his highest-priority unexplained category. The investigator explicitly noted the possibility of a single object seen from different angles. Whether or not that hypothesis is correct, the paired occurrence is analytically significant. 3. THE WITNESS REACTION AND DETAILS: "Couldn't believe his eyes." Ran to get his wife. "Large enough to carry one person." These are spontaneous, specific, specific-to-this-object details that suggest a witness who had seen something genuinely outside his experience and was trying to make sense of it in real time. 4. SMOOTH SURFACES AND NO OPENINGS: The cymbal shape with smooth surfaces and no observable openings, combined with the lusterless white color, is a specific physical description. This is not a light in the sky -- it is a described solid object with a describable surface character. 5. HYNEK'S OWN WORDS: He described these two Indianapolis cases, alongside incidents 17, 40, 75, and 84, as "the most tangible, from the standpoint of description, of all those reported, and the most difficult to explain away as sheer nonsense." From a scientific consultant employed to find mundane explanations, this is a remarkable statement. BOTTOM LINE: Incident #152 is the second half of what the original investigators considered a possibly paired event. A cymbal-shaped, lusterless-white, dome-topped disc, 20 feet in diameter, crossing Indianapolis from west to east at an estimated 1,800 miles per hour at 2,000 feet, making no sound, leaving no exhaust, for 10 seconds on a clear July morning in 1948. The man shaving couldn't believe his eyes. He ran to get his wife. They both looked. Two days earlier, just a few miles northeast, two other people had watched a different-shaped object glide silently at tree level at 30 mph. The same intelligence officer investigated both. He noted the shared 3:1 aspect ratio. He said these were the cases he could not explain away. The AMC said: no satisfactory conclusion can be drawn. Hynek said: most difficult to explain away as sheer nonsense. The form said: Unidentified. They were all right. ================================================================================ END OF EVALUATION GlitchyMatrix.com/bluebook/ | Project Blue Book Archive ================================================================================