Aviation hours with stopwatch ACS-1 on the dashboard

In aviation, time and some other indicators are measured using aviation clocks, chronometers, stopwatches, which function according to the principle of mechanical oscillations of the pendulum. The mechanism of such devices is activated by means of the consumption of a certain reserve of mechanical energy contained in the spring. The popular options on the airplane are the ACHS-1, which include a conventional time chronometer, a stopwatch and a flight time recording mechanism.

Application

The modifications considered are intended for the following purposes:

• Displays the current time (hours / minutes / seconds).
• For a separate fixation in hours and minutes (modifications АЧС-1М, АЧС-1МН).
• Count the flight time of flight of an airplane, helicopter or other aircraft.
• Keep records of small time intervals in minutes and seconds.

The stopwatch scale on the ACS-1 model is calculated for 60 minutes, on the variations of AChS-1M and MN-for 30 minutes. The second hand is centered, at the same time it acts as a stopwatch and works in this mode only if the stopwatch is on.

The usual daily indicator functions non-stop, and the device that determines the flight time and the stopwatch have separate control. On the front of the device are scales (3 pcs.) And head-pens (2 pcs.).

The purpose of the left handle

The left head, which is equipped with aviation watches, performs several functions:

• Serves for winding.
• It is designed to move the arrows of the main diurnal element.
• Used to trigger and deactivate the flight time mechanism.

The maximum spring plant guarantees operation for 72 hours. In order to achieve optimal accuracy, it is desirable to start the device every two days. The temporary flight mechanism is controlled by pressing the handle on the left, with the first action it is activated, in the signal gap a red color is formed.

Pressing the crown again turns off the flight time. The arrows fix the presence of the aircraft in the air, the scale notifies about it in red and white. The next (third) pressing returns the arrows to the original position (by "12"), in the signal niche the white color is displayed.

What is the right head for?

The right-hand handle of an aviation watch with a stopwatch is adjusted when starting and stopping the daily mechanism, the stopwatch, and also for returning the minute and second hands to the starting position.

The cyclic operation of the stopwatch goes through the full stage with three clicks. At the first touch the activation of the stopwatch mechanism takes place. The second press stops it, and the third - returns the arrows to their original position.

Features

Aviation hours are equipped with electric heating with a thermostat that maintains a temperature regime within 20 degrees. The element is connected to the on-board network by direct current. The recommended switch-on temperature is below five degrees. Before the flight begins, it is necessary to check the watch factory, put on them an accurate time indicator.

To do this, it is required to turn the head clockwise from the "12" phase by the second hand, stopping the stroke. Next, you need to take out the left handle to the stop, rotating it around the circle from right to left, set the exact time. After setting the current parameters, the left head is returned to its original position. To start the clock, the right handle is turned from left to right.

After the permission to take off has been received, it is necessary to activate the flight time mechanism, and after landing - turn it off by pressing the left handle.

Technical indicators

Aircraft mechanical watches (ASF) have the following characteristics:

• Cover the dial and the arrows with a white paint or reflective mass.
• Accuracy of the accuracy of the stroke per day - ± 20 sec.
• The duration of the complete machine plant is 72 hours.
• Recommended periodicity of the winding - every two days.
• The voltage of the heating circuit (DC) is 27 V.
• The resistance of electrical heating is 50 Ohm.
• The power of the built-in backlight is 5.5 V from the 400 Hz network.
• The weight of the device is 650-750 grams, depending on the model.
• Overall dimensions of ACS-1 are 85 * 91.4 mm.

Description of the elements

Aircraft side watches consist of a kind of engine (winding springs), devices that are responsible for the current time, stopwatch, flight period, stroke, as well as the regulator, controls and electric preheating with a thermocontroller, built-in lighting (AChS-1MN).

The device of the current time works non-stop from the engine, and the flight time and the stopwatch are turned on and off independently. To view the readings a dial with dials (3 pcs.) Is intended:

• For current time readings, the main (large) scale.
• Sector "Flight time" - for fixing flight time.
• Sector "SEC" - for counting the functions of the stopwatch.

The clock is controlled by two heads (pens).

Wrist modification

The Molniya factory in Chelyabinsk produces a unique project - wristwatches, which are an exact copy of the ASF device. The dial of the compact model completely copies the design of the original aviation watch, is equipped with appropriate scales, which give the opportunity to measure the time intervals in hours, minutes and seconds.

The material for the watch case is stainless steel. In the new line two modifications are developed: with special black PVD-spraying and without coating. On the back cover you can put an individual image, a memorable inscription, a wish, using the method of engraving.

Such an original gift will please any person connected with aviation or just a connoisseur of quality things. The wristwatch most closely resembles the aviation watch, which is mounted on almost all types of domestic aircraft.

Conclusion

Concluding the review of aviation hours, it can be noted that this is a reliable, unpretentious device that provides the maximum accuracy of the current time, the parameters of the flight period, which has the function of a stopwatch. Due to high quality indicators, the device under consideration and its modifications have been used in aviation for many years.

Flight hours with stopwatch do not require special care, one winding is enough for three days, and electric heating ensures their normal operation at any outside temperature. On the Internet, you can find many ads on the sale / purchase of ASF models, while their price is quite high. In addition, the quality of the device and their popularity is confirmed by a wrist-type copy, which is in great demand and exactly repeats the design and design of the on-board variation.