These questions were designed to test your knowledge of the physics behind the mechanisms. Instrument Makers are now Instrument Technicians, (or Avionics LAEs!) and no longer repair and adjust altimeter mechanisms for a living and our own last true instrument basher retired a couple of years ago. Now there's no-one in the company who can repair mechanical instruments; all our pitot statics and gyros are returned to the manufacturer these days. Its still interesting to reflect on all the old formulae and details of how temperature and density changes were corrected, but there's really not much practical use for such knowledge any longer. Most instruments use force feedback mechanisms and corrections are made digitally in the associated computer. Does anyone recall the last time a pilot snagged an altimeter for moving too many feet when he changed the millibar setting?
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Through difficulties to the cinema