https://en.wikipedia.org/wiki/Leica_Camera
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The company was founded by Ernst Leitz in 1914. The name Leica is derived from the first three letters of his surname (Leitz) and the first two of the word camera: lei-ca.
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Leica Camera – Wikipedia
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May 9, 2019https://aerospaceengineeringblog.com/turbine-cooling/
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A rule of thumb is that the blade life is halved (for a specific blade material and cooling technology) for each 10°C rise in temperature of the metal [1]. The TET has risen from about 1050K in 1944 to about 1750 in the 1994 Rolls-Royce Trent engine. This is partially due to the use of better materials such as Inconel and single-crystal metals with better creep and fatigue properties. However there is a bound to this solution since these nickel-based alloys are typically quite heavy, leading to an increase in centrifugal stresses at the root. Therefore more important in this development has been the technology of channelling of cold compressor air to cool the turbine blades. Using these advanced cooling techniques has allowed engineers to increase the TET beyond the melting point of the blade materials. “}}
