W H E N the Manhigh capsule system was being designed in the fall of 1955, the pr imary objective was a maximum performance system of minimum weight that could lift a man into a space equivalent environment for twenty-four hours. This objective 'had to be met safely and supply an answer to what the man could :do if any specific componem failed. Beyond this, an effort was made to provide him wit...

A noisy environment dominated by low frequency noise can often be improved through the use of active noise control. This situation arises naturally in propeller aircraft where the propellers induce periodic low frequency noise inside the cabin. The cabin noise is typically rather high, and the passenger flight comfort could be improved considerably if this level were significantly reduced. This...

It has been suggested that the risk of rupture of intracranial aneurysms may be fostered by climatic drops in barometric pressure, as also occurs to passengers subjected to the air pressure settings inside aircraft cabins. We present two cases of flight-related aneurysmal SAH followed by intracerebral rebleeding in the cabin (case 1) and carotid dissection after landing (case 2). Management and...