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His features changed slowly as he talked because of acceleration-driven blood engorging his lips and bloating his cheeks. After one instant he closed his eyes fiercely. They felt as if they would pop out of his head. He gasped, "Yes! Get down to air-resistance. A chance not good but a chance ejection seats with space suits might make it...."
The vessel belongs to the non-rigid class, but the whole of the suspension system is placed within the gas-bag, so that the air-resistance offered by ropes is virtually eliminated in its entirety, for the simple reason that practically no ropes are placed outside the envelope. The general principle of design may be gathered from the accompanying diagram.
A full-rigged airship such as the Parseval, for instance, may present a picturesque appearance, but it is severely unscientific, inasmuch as if it were possible to eliminateor to reduce the air-resistance offered by the ropes, the speed efficiency might be raised by some sixty per cent and that without any augmentation of the propelling effort.
Friction and air-resistance in their case are practically nonexistent. I do not, of course, mean to deny the ancient tradition that a sound body makes a sound mind. But I would only point out that we are just beginning to wake to the truth of the converse proposition, that a sane, equable, easy-going mind keeps the body well.
It means that the inertia-mass which increases with speed Einstein's stuff is not a property of matter, but of space, just as the air-resistance that increases when an airplane goes faster is a property of air and not of the plane. Maybe we need to work out a theory that all inertia is a property of space. We'll see if we need that.
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