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This Project Blue Book case file, released through The Black Vault, collects records on the 24 July 1948 sighting by two Eastern Airlines pilots of a wingless object about 20 miles southwest of Montgomery, Alabama. It contains teletype replies from military bases reporting no aircraft movements, a 1948 Project Sign special investigation report with an interview of a Robins Air Force Base witness, and a December 1948 intelligence report. It also includes newspaper extracts, a Harvard College Observatory letter and Hynek's Project Grudge evaluation index.
on such a body would be accompanied by high drag, places a serious limitation on the range of the aircraft for any particular gross weight. If this type of unidentified serial object has extremely long range, it is probable that the method of propulsion is one which is far in advance of presently known engines. POWER SOURCES (a) The foregoing discussion is predicated upon the assumption that power sources presently avail- able would have to be used. If an atomic energy powered engine were available, a small mass flow at a large velocity would accomplish the required lift and propulsive forces and the large energy expenditure would be of small importance. (b) However, the heat exchange requirements for the atomic powered engine appear to demand physical dimensions of inordinate size that presently would preclude the use of this powerplant for aircraft. Experimental work in progress to convert the energy of the atomic pile directly to electricity, rather than heat, offer the promise of a more compact atomic powerplant. Conclusions: 1. The flying anomaly observed, remains unidentified as to origin, construction and power source. 2. A definite trend of flight headings has evolved as generally south in bearing. 3. Supporting evidence from separate reliable sources establish existence of this configuration. It has been established by Project Rand investigations that world resources, technical attainments and existing materials are adequate to construct of a space ship. It is now aerodynamically feasible for subject confirmation to flight. It would support its self-profit by devoting dynamic means.
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