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Aerospace Lubricants Polymers

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Technical Paper

“Rigidization-on-Command”™ (ROC) Resin Development for Lightweight Isogrid Booms with MLI
2003-07-07
2003-01-2342
The “Rigidization-on-Command”™ (ROC™) resin development has focused on the development of resin systems that use UV light cure for rigidization. Polymeric sensitizers have been incorporated into the resin formulations to promote cure using Pen-Ray lamps and UV light-emitting diodes (LED's). Formulations containing the polymeric sensitizers were examined by FTIR and DSC. Complete cure was observed after 15 min. exposure with the Pen-Ray lamps. Performance of the Pen-Ray lamps and UV LEDs was thoroughly characterized. Thermal models were developed to optimize the performance of the of the MLI insulation thermal oven used for orbital cure of the boom. Results show that -12°C is the lowest temperature required for cure of the ROC™ resin systems.
Technical Paper

the behavior of Radiation-Resistant ANP TURBINE LUBRICANTS
1959-01-01
590051
RADIATION can produce almost instantaneous failure of modern aircraft lubricants, tests at Southwest Research Institute show. Two types of failures demonstrated are rapid viscosity rise and loss of heat conductivity. Furthermore, it was found that lubricants can become excessively corrosive under high-level radiation. Generally speaking, the better lubricants appeared to improve in performance while marginal ones deteriorated to a greater extent under radiation. When the better lubricants were subjected to static irradiation prior to the deposition test, there was a minor increase in deposition number as the total dose was increased.
Standard

Wheel Chocks
2021-04-08
CURRENT
AIR4905A
The purpose of this document is to present general considerations for the design and use of aircraft wheel chocks. The design and use of aircraft wheel chocks is a good deal more complicated than it may appear at first glance.
Standard

Wheel Chocks
2011-05-16
HISTORICAL
AIR4905
The purpose of this document is to present general considerations for the design and use of aircraft wheel chocks. The design and use of aircraft wheel chocks is a good deal more complicated than it may appear at first glance.
Technical Paper

Weld Stress Evaluation — Electronic Modules
1965-02-01
650856
Welded joints of electronic modules are ad­versely stressed by some encapsulants, especially when subjected to temperature cycling. Weld joints of specific tensile strengths were developed, encap­sulated with various resins, and temperature-cycled to determine failure caused by internal stress. Resins with high coefficients of thermal expansion and high shrinkage values caused weld failures after cure. Furthermore, stress reduction can be accom­plished by proper spacing of weld interconnects.
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