The Pressure Cabin
Based on Auguste Piccard's Original
|The XAP cabin, often called the Gondola, will be produced by the Acme Metal Spinning Company of Minneapolis, Minnesota, builders of the U.S. Navy Stratolab cabin for Jean Piccard and the four foot cabin for Don Piccard's "Golden Bear" record balloon - winner of the State of California Gold Medal.|
|Material below is courtesy|
|of Acme Metal Spinning &|
The Johnston Family.
Stainless Steel Hemispherical Parts
The Acme Metal Spinning Company cabin used for the U. S. Navy's "Stratolab" program was welded from eight spherical right triangles, thereby having no (stress raising) "Tee" weld joints. In 1960, four foot diameter was Acme's largest diameter spinning capability. The Golden Bear cabin was assembled with equatorial spun flanges joined with Mil Spec aircraft nuts and bolts.
A reclining formed foam seat provided a comfortable pilot cockpit for six foot two inch Piccard in 1960. XAP will use Acme's current ability to make a more spacious five foot sphere from two halves. XAP has considerably greater requirements for on board life support apparatus and flight instrumentation. The hatch will, once again, be at the top pole of the cabin for convenient "open basket" hot air balloon piloting technique at low altitudes for the final stages of the expedition.
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