5 ms·

Do you have a reference for this?

• beamatronic 11y ago
  How about this? http://www.airspacemag.com/military-aviation/how-things-work-supersonic-inlets-35428453/?no-ist http://www.airspacemag.com/military-aviation/how-things-work... "During some Blackbird flights, however, the harmonious working of the spike and the forward and aft bypass doors broke down, and all too quickly the inlet was filled with more air than it could handle. When the air pressure inside the inlet became too great, the normal shock wave was suddenly belched out of the inlet in an unstart, accompanied by an instantaneous loss of air flow to the engine, an enormous increase in drag, and a significant yaw to the side with the affected inlet. Unstarts occurred 'when you least expected them—all relaxed and taking in the magnificent view from 75,000 feet,' wrote Graham in SR-71 Revealed. If the crew’s attempts to restart the inlet’s supersonic flow failed, they would have to slow their aircraft to subsonic speeds."
• dogma1138 11y ago
  It wasn't really a "bug" but more that the computers could not keep up with changes in the flight conditions so if the engine spikes were not in the correct position for the speed and altitude it could cause a blow back which would extinguish the engines which will require the pilots to restart them. https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Air_inlets https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird#Air_i...
  • gherkin0 11y ago
    It also looks like they later mitigated it as technology improved: > Lockheed later installed an electronic control to detect unstart conditions and perform this reset action without pilot intervention. Beginning in 1980, the analog inlet control system was replaced by a digital system, which reduced unstart instances.
• deleted 11y ago
  [deleted]