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Magnetic tapes use:

- in on-board devices of parameters registration intended for automatic flight data recording (altitude, flight speed, aircraft engines rotation speed, angle of attack, acceleration factor) and parameters of the most important aggregates and systems

- in ground systems for aircrafts telemetry data recording and its further processing, for recording encoded information in the data systems storage devices.

И 4335, И 4435, И 4535 for recording and reproducing of multi-track impulse signals with density up to 1300 p.p/mm as a part of precise magnetic recording equipment. Environmental conditions (from -60С to +60С), mechanical conditions (buffing load: impact frequency not more than 80 min-1 and acceleration factor not more than 117.6m\s2, vibration load in the frequency range not more than 300 Hz). Are produced on the basis of gamma iron oxide. Comply with the requirements of TS 6-17-1308-85 , GOST 22507-77.

(width.6.3 mm; 12.7 mm; 19.05 mm; 25.4 mm)

Technical characteristics И 4335
Number Indicators Measurement units Norm by TS
1 Длина м 250-750 1050±50
2400±200
1500±100
2 Width mm 25,4 6,3 12,7 19,05
3 Thickness microns 30-3
4 Static tape curvature, not more than mm/m 1,0 2,0 1,0
5 Curl, not more than mm 0,5 0,15 0,4
6 Output signal relative level, not less   1.0
7 Relative acutance, not more than   1.0
8 Signal drop-out coefficient, not more than   1.10-5
9 Friction force change after 5000 passes, not more than % 50


Technical characteristics И 4435
Number Indicators Measurement units Norm by TS
1 Length m 250-750 1050±50
2400±200
1500±100
2 Width mm 25,4 6,3 12,7 19,05
3 Thickness microns 30-3
4 Static tape curvature, not more than mm/m 1,0 2,0 1,0
5 Curl, not more than mm 0,5 0,15 0,4
6 Output signal relative level, not less   1.0
7 Relative acutance, not more than   1.0
8 Signal drop-out coefficient, not more than   1.10-5
9 Friction force change after 5000 passes, not more than % 50


Technical characteristics И 4535
Number Indicators Measurement units Norm by TS
1 Length m 250-750 1050±50
2400±200
1500±100
2 Width mm 25,4 6,3 12,7 19,05
3 Thickness microns 30-3
4 Static tape curvature, not more than mm/m 1,0 2,0 1,0
5 Curl, not more than mm 0,5 0,15 0,4
6 Output signal relative level, not less   1.0
7 Relative acutance, not more than   1.0
8 Signal drop-out coefficient, not more than   1.10-5
9 Friction force change after 5000 passes, not more than % 50


В 4618, В4617, В4407 intended for multi-track digital and analogues recording of encoded information in storage devices of the informational systems of electronic data processing machines. Complies with the requirements of TS 6-17-1322-85 width.

(12.7 mm, width 25,4 mm, width 35 mm)

Technical characteristics В 4618
Number Indicators Measurement units Norm by TS
1 Relative sensitivity at frequency 400 Hz dB ±2
2 Frequency response at frequency 10000 Hz dB ±2
3 Response nonuniformity at frequency 400 Hz by the roll length dB ±2
4 Noise level at DC magnetic bias dB -40
5 Harmonic distortion (not more than) % 3
6 Curl lead mm 2
7 Tape curvature mm/m 2


Tape with black silver layer ЛЧ-С. Used in electronic data processing machines. Basis cellulose acetate, perforated, width 35 mm, length 300 m. Optical density not less than 2,9 . Complies with requirements of TS 6-17-740-75.

Magnetic tapes 

During long time Astrum LLC produce qualitative magnetic tapes with different technical characteristics. These magnetic tapes are used for everyday video- and audio recording and in scientific or aviation brunches as well. In aviation they are really necessary for flight data recording and they are placed in the airborne recorders.  
 
The magnetic tapes are produced on the magnetic lacquer basis with the use of gamma iron oxide and substance on the polyurethanes basis. They are distinguished on the roll and cartridge tapes. The roll magnetic tapes, wounded in rolls of different diameter, as a rule are used in the reel recorders. These tapes are used for everyday recording and marked by “B” letter. The cartridge magnetic tapes are the part of audio cassettes and are used for cassette recorders. Industrial magnetic types with higher technical characteristics are used in the computer science industry. As a rule such tapes are marked by “V” letter. Such magnetic tapes as V4618, V4617, and V4407 are related to them.
 
Astrum LLC produces also the magnetic tapes with the black silver layer which are used in different brunches.
 
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