Thousands fled from their homes as lava oozed out of a rumbling Philippine volcano on Monday in what volcanologists described as a "quiet eruption", warning it could lead to a hazardous explosion within days. Lava was slowly flowing out of the Mayon volcano's crater along with a spectacular 1,000-metre (3,280-foot) ash plume rising into the sky, the nation's volcanology institute said. It may escalate into a hazardous eruption," Paul Alanis, science research specialist at the Philippine Institute of Volcanology and Seismology (Phivolcs), told AFP.
The Blackbird’s design reflected the fact that it was pushing the limits. The SR-71’s J58 engines could only start through use of two vehicle-mounted V8 starter engines, and the triethylborane used in the fuel would belch green flames during ignition. The J58s would switch to a partial ramjet mode at high speeds, such that the SR-71 actually became more fuel efficient when it went faster.