Documents / FOIA release
The Roswell Report: Fact versus Fiction in the New Mexico Desert was published in 1995 by Headquarters United States Air Force. It was written in response to Representative Steven H. Schiff's request and a General Accounting Office audit, and it contains Col. Richard L. Weaver's report and 1st Lt. James McAndrew's synopsis, along with attachments, appendices and photographs. The report says researchers found no evidence of an extraterrestrial craft or crew. It concludes that the 1947 debris came from a Project MOGUL balloon train.
A glass flask is open to- atmoapheric pressure through a fine capillary tube. With nrious rates of change of pressure, various differential pressures exist between the air in the flask and the outside air. This pressure difference controls the level of liquid in a manometer switch, tilled with 24% hydro- chloric acid. When the internal pressure is 0.2 mb more than the ambient pressure, the switch opens and ballast flow is stopped even though the balloon may be be low the tloa tin_g level. (The switch is set so that a rate of change ot .1 mbfminute acting for three or more minutes will open the switch. ) By thus re- stricting flow when the balloon is rising, balloon oscillations are minimized and ballast is conserved. A sketch of this opera- tion i.s shown as Figure 13. DISPLACEMENT SWITCH DISPLACEMENT a RATE SWITCHES ' -Aif•J;d-;+: --Floating ~~ ~~ Tune - I I Balloat Flow T1111e., Figure 13. Height-time curve, showing ballast control action. Since the rate switch is much more delicate than the displace- ment switch, safety considerations have caused the combined con- trol to be supplemented by a pure displacement switch control. In this, the conducting segment of the pressure modulator is divided, and only a limited pressure height range (set for de- sired floating level) is controlled by both switches in series. If the rate switch is damaged at launching (by spilling some of its electrolyte, for instance) or in flight (perhaps by evap- oration of the electrolyte) and the balloon descends, simple displacement control becomes effect when the high pressure (lower altitud~ segment of the conductor is touched by the pres-
FOIA release, from the osd collection. The PDF is mirrored here; the original link is under it. 993 pages are in the text index: search them above, or from the library's search.