This instrument furnishes on a chart a permanent record of following operating information: engine speed attained every second, time and duration of flights, time and duration of stops, time of day in hours and minutes, flight hours, idle time, trip revolutions, total revolution; in addition it indicates to pilot true speed development of engine and how it is functioning, and time of day.
The hasler tel recorder for aircraft
Instruments
Instruments ; 1 , n 5
1928
2 pages
2 Figs.
Article (Journal)
English
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The hasler tel vehicle recorder
Engineering Index Backfile | 1928
The Hasler speed recorder and indicator
Engineering Index Backfile | 1909