Gyroscopic flight instruments, essential for instrument-rated pilots, are prone to failure, often due to mechanical vacuum or air pump issues (e.g., carbon vane deterioration in dry pumps), which can ...

Helicopters have won high marks in Viet Nam doing the chores they were designed for: carting supplies, ferrying troops, evacuating wounded. But, decked out with bolt-on guns and rocket launchers, the ...

TimesMachine is an exclusive benefit for home delivery and digital subscribers. Full text is unavailable for this digitized archive article. Subscribers may view the full text of this article in its ...