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Quoting ChatGPT (and after a quick sanity check), The F-35 Joint Strike Fighter uses a specialized hydraulic fluid that’s based on a synthetic ester formulatio
by grumpy-de-sre 1y ago
Quoting ChatGPT (and after a quick sanity check),
The F-35 Joint Strike Fighter uses a specialized hydraulic fluid that’s based on a synthetic ester formulation, not a petroleum-based fluid.
Specifically, it uses phosphate ester–based fire-resistant hydraulic fluid (commonly in the MIL-PRF-83282 or newer MIL-PRF-87257 class).
Apparently the older phosphate-ester based hydraulic fluids were hygroscopic but I'm not sure if the newer variants are.
- yobbo 1y agoSounds similar to DOT-5 brake fluid. Maybe this: https://en.wikipedia.org/wiki/Tributyl_phosphate https://en.wikipedia.org/wiki/Tributyl_phosphate "The major uses of TBP in industry are as a component of aircraft hydraulic fluid, brake fluid, and as a solvent for extraction and purification of rare-earth metals from their ores" It might be better if it is hygroscopic as the water won't separate and risk forming ice plugs in the hydraulic lines.
- cwmoore 1y ago[dead]
- Workaccount2 1y agoYes, lets condition people to never reveal they used ChatGPT. Even though the response seems accurate. [1]https://hiigroupasia.com/f-35-aviation-ground-support-equipment/#:~:text=Test%20Medium%20:%20Hydraulic%20fluid%2C%20MIL,GPM%20at%205000%20PSI%20combined. https://hiigroupasia.com/f-35-aviation-ground-support-equipm...
- grumpy-de-sre 1y agoYeh the sanity check involved researching the milspecs listed and the connection to the F35 program.