The major programs conducted during the reporting period were: installation and test of prototype low-loss (roto) launching valve; modification and test of the rotary-retraction engine; development testing of above-deck steam-elimination components; and minor component development tests. (Author).

Filled with anecdotes, plans, photographs, drawings and detailed descriptions of the workings and history of all the major types of catapults, these pages will help readers get started in this fascinating hobby of harnessing the power and energy of simple and ancient machines, then using them to hurl all sorts of silly things into the air just to watch them splat.

This study is about innovations in carrier aviation and the spread of those innovations from one navy to the navy of a close ally. The innovations are the angled flight deck ; the steam catapult ; and the mirror and lighted landing aid that enabled pilots to land jet aircraft on a carrier's short and narrow flight deck.