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C-98-868:
The micro coplanar stripline consists of a pair of lines which
are repeated vertically by a thin layer of spin-on-glass. The
circuit is fabricated on high resistivity silicon. This picture
shows the THRU, DELAY and Reflection Standards for calibrating
the automatic network analyzer to carry out on-wafer TRL measurements.
The application of these standards is to de-embed the effective
dielectric constant and also the equivalent circuit parameter
of discontinuities.
C-98-679:
A qualitative study of a bursting water balloon in a simulated
low-gravity environment was conducted aboard NASA Lewis' DC-9
aircraft. Following rupture by a syringe needle, the balloon
retracts tangent to the water surface leaving a smooth surface
near the puncture location. Asymmetries soon develop as the
membrane rips apart, ejecting a directional spray from the surface.
When the ballon parts entirely from the drop, it causes a large
deformation of the remaining liquid mass leading to significantly
underdamped oscillations.
C-98-303:
Performance testing of the 2D Bifurcated inlet in the 10x10
Supersonic Wind Tunnel (SWT) continues. The inlet is shown configured
with a General Electric J85 engine. The testing is providing
data on inlet/engine interactions, inlet pressure measurements
during engine stalls and dynamic transient effects. Based on
its performance during this testing, the inlet has been selected
by the NASA/Industry High Speed Research team for the Preliminary
Technology Configuration of the next generation High Speed Civil
Transport (HSCT) aircraft.
C-98-716:
Two hot-wire probes used to measure the flowfield downstream
of the fans of ultra-high bypass ratio turbofan models tested
in the Glenn 9X15 foot wind tunnel. Each probe contains four
wires which allow the measurement of all three velocity components
in the flow. Cross-correlation of the signals from the two probes
allows a measure of the length scale of the turbulence in the
flow.
C-98-729:
The Propulsions Systems (PSL) Control Room is an integral part
of the test operations at the facility. This photo reflects
some of the test engineering staff and test operators during
a recent GE J85 Turbine Based Combined Cycle Propulsion concept
test. This test is being done as part of NASA's mission to achieve
air-breathing hypersonic flight.
C-98-514:
These M-50 disks are corrosion test specimens run in a perflouropolyether
high temperature lubricant at 330C in pure oxygen. One disk
was run with no additive and showed a large amount of corrosion.
The other specimen was run with an anti-corrosion additive and
showed no signs of corrosion.
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