# June 17, 1952 — McChord AFB, Tacoma, Washington — 1–5 Silver Yellow Objects Stop and Start / Fournet's Motion Study #5

**URL:** https://uapdiscovery.discourse.group/t/june-17-1952-mcchord-afb-tacoma-washington-1-5-silver-yellow-objects-stop-and-start-fournets-motion-study-5/185
**Category:** Blue Book Unknowns
**Created:** [June 17, 2025, 1:58am UTC](https://uapdiscovery.discourse.group/t/june-17-1952-mcchord-afb-tacoma-washington-1-5-silver-yellow-objects-stop-and-start-fournets-motion-study-5/185 "2025-06-17T01:58:56Z")
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### Author: ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)
#### Post date: [June 17, 2025, 1:58am UTC](https://uapdiscovery.discourse.group/t/june-17-1952-mcchord-afb-tacoma-washington-1-5-silver-yellow-objects-stop-and-start-fournets-motion-study-5/185/1 "2025-06-17T01:58:56Z")

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![06171952-McChordAFB-IURv33n1-p11](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/e77caaae2fd12c22ae355f37ba883a5506af04c7.png)

June 17, 1952 — McChord AFB, Tacoma, Washington  
7:30–10:20 p.m. Many witnesses at McChord AFB [now Joint Base Lewis-McChord] south of Tacoma, Washington, see 5–6 yellowish discs, tracked by radar and theodolite. Several F-94s are scrambled. [Eberhart]

Blue Book Memorandum For The Record:

 ![06171952-McChordAFB-BB-1](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/8b24114ff6e761b57f91b8850229ab7bb0918ea3.jpeg)  
 ![06171952-McChordAFB-BB-2](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/f0aef6201cb243b1c87f583ed74d2a55e8080238.jpeg)  
 ![06171952-McChordAFB-BB-3](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/74ce6d96e3602fd9e2c7f7534946cece0d980156.jpeg)

Sources:  
Brad Sparks, Blue Books Unknown Catalogue, Case 621, p. 138;

 ![06171952-McChordAFB-Sparks-Case621-p138](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/d91ce9cbec24ded9b55b94ba53aef7bc67d95d8f.png)

Michael D. Swords, “Intelligent Motions,” IUR 33, no. 1 (March 2010): 11, 15;

 ![06171952-McChordAFB-IURv33n1-p15](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/1X/fa032058ec795cab386e669939a79a05b67ca474.png)

NICAP, “1–5 Silver Yellow Objects Stop and Start”;

> **[UFO Report](http://www.nicap.org/520617mcchord_dir.htm)**