DOW-UAP-D097, Project Sign Progress Report, 1948
Department of War · 1948 · Various · Document
DOW-UAP-D097, Project Sign Progress Report, 1948 is indexed as a Department of War record with incident date 1948 and location Various. This file contains an initial report from the Air Materiel Command regarding Project Sign. Project Sign was a 1948-1949 U.S. Air Force program to investigate the nature and origin of unidentified flying objects (UFO). The report details 100 UFO sightings from 1947-1948. The file also contains an article excerpted from The Aeroplane, an aviation-focused periodical magazine published between 1911 and 1968, titled The Biology of the Flying Saucer.
Notable / anomalous element
- On this consideration of fore-and-aft stability and control, designers bad some justification for thcir decision against experimenting with disc wings. (native PDF text, page 40)
- Zimmermann, mentioned earlier as stimulator of gas turbines have been installed, and it is quite possible that the disc wing, approached the conception of the helicopter a combined oropulsion with thermal jet and airscrew rotor Aeroplane on the basis of his results with low aspect ratio is alt:eadv under test. (native PDF text, page 44)
- The real pioneer of the disc wing was a very able American research engineer of the National Advisory Committee for Fig. (native PDF text, page 40)
- Beyond their critical incidence disc wings gave a gradual decrease of the lift force whereas wings of normal aspect ratio gave a very abrupt; nd unsteady one. (native PDF text, page 40)
Details
- Thie ie an initial report on unidentified flying objecta aa direoted by Rq, USAY letter dated SO Deoember 1947, signed by General L. (native PDF text, page 1)
- Qtarterly reports will be submitted beginning 1 July 1948. (native PDF text, page 1)
- Ae a reeult of thia letter, Pro ot HT-304 was a.oti Tated on 26 January 1948 and Technical Inatruotion 2185, dated 11 Pebruaiy 1948, wns published. (native PDF text, page 1)
- Schedules of activities of lighted night-flying ad Tertising blimps have been secured a.nd crosa-oheoked at thi.a Headquarters to consider them as a possible souroe ot incident nporta. (native PDF text, page 1)
- Inoloaure l represents a tabulation am breakdo Wll of all available reports through l February 1948. (native PDF text, page 1)
- ia a series of interesting observation that were noted when rev19Wing the many incident 0ase11. (native PDF text, page 1)
- Reported sizes have varied from that of a 26-oent pitoe to 260 feet in diameter, and from the aise or a puraui t plane to tht e Pulk of six B-29 airpl.&nea, NND 927545 (native PDF text, page 1)
- AMC 2 3 APir 19 48 Subject, Project "SIG!i" e. umber of objects per aighting, Objects per sighting l 2-6 6-10 over 10 Number of eightioga 77 21 8 9. (native PDF text, page 2)
Tags: War Department, 1948, Various, Air Force, Flying discs, Unidentified object, Project Sign, Discs, Saucers, Helicopter