The Breitling Navitimer, a watch synonymous with aviation history and horological excellence, is instantly recognizable by its distinctive circular slide rule bezel. This intricate feature, a hallmark of the Navitimer's design, is more than just a stylistic element; it's a fully functional calculating tool capable of performing a surprising array of calculations. While many modern watch wearers may find the slide rule obsolete in the age of smartphones, understanding its functionality offers a fascinating glimpse into the history of aviation and the ingenuity of mechanical engineering. This article delves deep into the functionality of the Breitling Navitimer's slide rule, exploring its capabilities and providing practical examples of its use. We will dispel any doubts about its efficacy with a detailed examination of its operational principles. The question "Breitling Navitimer: Funktioniert der Rechenschieber?" is unequivocally answered: yes, and here's how.
Zur Funktion der Rechenschieber (On the Function of the Slide Rule):
The Navitimer's slide rule is based on the principle of logarithmic scales. Instead of directly adding or subtracting numbers, it manipulates their logarithms. Because the logarithm of a product is the sum of the logarithms of its factors, and the logarithm of a quotient is the difference of the logarithms, multiplication and division become simple addition and subtraction on a logarithmic scale. This is precisely what the Navitimer's rotating bezel allows.
The bezel is divided into several scales, each serving a specific purpose. The most prominent are typically the inner and outer scales used for multiplication and division. Other scales may include those for fuel consumption calculations, time/speed/distance computations, and even currency conversions (depending on the specific Navitimer model and year of production). Each scale is carefully calibrated to facilitate these operations. The interaction between the fixed bezel scale and the rotating bezel allows for the manipulation of these logarithmic values, resulting in the calculation of the desired result.
Understanding the Scales:
Different Navitimer models may have slightly varied arrangements of scales, but the core functionality remains consistent. A typical arrangement includes:
* Inner Scale (often marked "1" to "10"): This is usually the fixed scale, providing the base for many calculations.
* Outer Scale (often marked "1" to "10"): This is the rotating scale, manipulated to perform the calculations.
* Specific Scales (e.g., fuel consumption, speed/time/distance): These scales are specialized and require specific instructions for use.
These scales aren't arbitrary; they are meticulously calibrated to represent logarithmic values. The positioning of the numbers reflects the logarithmic relationship between them, enabling the slide rule's unique computational capabilities.
Five Examples of Navitimer Slide Rule Calculations:
Let's illustrate the Navitimer's functionality with five practical examples:
1. Multiplication: To multiply 2 x 3, align the "1" on the rotating outer scale with the "2" on the fixed inner scale. Then, find the "3" on the rotating scale and read the result ("6") on the fixed inner scale directly opposite.
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