Full Flight Envelope Direct Thrust Measurement on a Supersonic Aircraft

Direct thrust measurement using strain gages offers advantages over analytically-based thrust calculation methods. For flight test applications, the direct measurement method typically uses a simpler sensor arrangement and minimal data processing compared to analytical techniques, which normally require costly engine modeling and multisensor arrangements throughout the engine. Conversely, direct thrust measurement has historically produced less than desirable accuracy because of difficulty in mounting and calibrating the strain gages and the inability to account for secondary forces that influence the thrust reading at the engine mounts. Consequently, the strain-gage technique has normally been used for simple engine arrangements and primarily in the subsonic speed range. This paper presents the results of a strain gage-based direct thrust-measurement technique developed by the NASA Dryden Flight Research Center and successfully applied to the full flight envelope of an F-15 aircraft powered by two F100-PW-229 turbofan engines. Measurements have been obtained at quasi-steady-state operating conditions at maximum non-augmented and maximum augmented power throughout the altitude range of the vehicle and to a maximum speed of Mach 2.0 and are compared against results from two analytically-based thrust calculation methods. The strain-gage installation and calibration processes are also described

Office of Saline Water Reports

From Summary: "The transport-depletion data obtained by the Southern Research Institute and by the Bureau of Reclamation at Denver, Colorado and at Webster, South Dakota, was reviewed. This data review made it possible to develop a design methodology for the pilot plant, and to identify the additional data required to adequately predict the performance of a transport-depletion stack.

Office of Saline Water Reports

Report that "presents the results of an engineering study of the design and economics of a single purpose gas tubine powered vapor compression cycle seawater desalting plant." (p. 1

FLIGHT-CRITICAL DATA INTEGRITY ASSURANCE FOR GROUND-BASED COTS COMPONENTS 7. Author(s)

through the National Technical Informatio

Development of liquid metal level probes /

"Contract AT(30-1)-2789.""April 21, 1964"--page 5."Issued, April 27, 1964.""PWAC-423."Includes bibliographical references (p. 58).Mode of access: Internet

High temperature thermometry at Pratt & Whitney Aircraft - CANEL /

"Contract AT(30-1)-2789.""(TID-4500, 41st Ed.) UC-80 Reactor Technology.""PWAC-462.""May 24, 1965"--page 5."Issued, June 2, 1965."Includes bibliographical references (page 27).Mode of access: Internet.This bibliographic record is available under the Creative Commons CC0 "No Rights Reserved" license. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law

The electrical resistivity of lithium and sodium-potassium alloy /

"Contract AT(11-1)-229.""UC-25 Metals, Ceramics, and Materials ; (TID-4500, 16th Ed.).""PWAC-349."June 15, 1961--page 9."Issued, June 30, 1961."Includes bibliographical references (page 33).Mode of access: Internet

The electrical resistivity of sodium, potassium, rubidium and cesium in the liquid state /

"Contract AT(30-1)-2789."June 28, 1962--page 9.Issued June 30, 1962."PWAC-376."Includes bibliographical references (page 31).Mode of access: Internet