Former SR-71 engineer talks NASA's Blackbird revival program
Former NASA propulsion engineer Tim Conners breaks down the technical hurdles and purpose behind efforts to revive the mothballed SR-71 Blackbird.
summary is enough An insider engineer provides realistic technical constraints on reviving the SR-71, though much of the revival effort remains speculative.
summary
Former NASA propulsion engineer Tim Conners shares insights on reports that the agency is attempting to resurrect the mothballed SR-71 Blackbird. He speculates the aircraft would serve as a high-speed engine test bed for advanced Mach 3+ propulsion rather than an aerodynamic model. While the airframe and wiring may survive, the original J58 engines are likely unserviceable and the unique JP-7 fuel would require a chemical surrogate. Conners notes that high bureaucratic risk-aversion and degraded electrical systems remain major hurdles.
key points
- NASA's Tail 844 is likely being evaluated to serve as a high-speed engine test bed for advanced Mach 3+ propulsion systems.
- The original J58 engines are assumed unserviceable due to decades of storage, requiring alternative powerplants and a chemical surrogate for JP-7 fuel.
- Primary technical hurdles include inspecting degraded elastomerics, wiring insulation, and electrical continuity across the hydromechanical airframe.
who should read it
Aerospace engineers and aviation enthusiasts interested in high-Mach flight and structural restoration.
discussion positive
consensus
Readers debate whether reviving a decades-old airframe is practical compared to starting from scratch, while sharing historical context on its extreme operating environment.
pushback
A minority suggests the project might be bureaucratic posturing or a misdirection tactic rather than a viable engineering effort.
I almost skipped the videos embedded in this article, but they are well curated gems. A few tidbits I found amazing:
- 800°F (and above) was the temperature of their cooling air
- the engine ran too hot for electronics, so they designed a hydraulic mechanical computer responsible for regulating various inputs
- the roar from the two external 400 cubic inch Buick V8 engines originally used to start the aircraft was so irresistible to the hotrod enthusiasts running them that they sometimes neglected to disconnect in time before the starter engines overran RPM limits and "puked their guts out …
It highlights fascinating engineering details about the SR-71's extreme thermal environment and mechanical computing systems.
Generated by an LLM from the article and thread. Check the sources before relying on it.