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9. Retrofit of various international avionics to NVG

In 2019, night vision light filters were developed and applied to adapt the illumination units of a number of worldwide devices to NVG, namely:

1) course control unit GFD11 (DAC Intl. Inc.),

2) switch panel of electronic flight and navigation system K069-31561-1 (Kelowna Flightcraft Ltd.),

3) switch of modes of the director system MS-700 (Honeywell Intl. Inc.),

4) slide indicator of the ED-800 flight controller (Honeywell Intl. Inc)

 

9.1. Adaptation of the course control unit GFD11 (p / n 1001-4000-22). Manufactured by DAC Intl. Inc.

   The front panel of the GFD11 device is a light guide with inscriptions  (see Fig. 1).

GFD11_day.png

Figure: 1. Appearance of the GFD11 device in the "day" mode

   The light guide is illuminated by six miniature incandescent lamps with bulbs of 3 mm diameter and an operating voltage of U = 5V (see Fig. 2 and 3).

    The illumination unit of this device in the initial state is not adapted to the NVG.

GFD11_plata.png

Figure: 2. External view of the electrical board of the GFD11 device with incandescent lamps

5 - volt lamps

GFD11_svetoprovod.png

Mounting seats for lamps

Figure: 3. External view of the light guide of the GFD11 device with mounting seats for six incandescent lamps

    To provide NVG compliance of the device, miniature plastic cylindrical night vision filters, the shape of which is shown in Fig. 4, are used.

    The filters are selected to keep the GFD11 color as close to the original as possible.

    The transmission spectrum of a cylindrical filter is shown in Fig.5.

Cyl_Radiant4PZK_GFD11.png

Figure: 4. Cylindrical IR filter for adapting the illumination unit of the GFD11 device

spektr_radiant4pzk.png

Figure: 5. Transmission spectrum of a cylindrical filter for adapting the illumination unit of the GFD11 device

Lighting characteristics of the GFD11 course control unit before and after adaptation

 

9.2. Adaptation of the electronic flight and navigation system switch panel K069-31561-1. Manufactured by Kelowna Flightcraft Ltd.

K069_day.png

   The front panel of the K069-31561-1 instrument is a light guide with inscriptions (see Fig. 6).

Figure: 6. External view of the K069-31561-1 device in the "day" mode

K069_plata.png

5 - volt

lamps

27 - volt

lamps

Fig. 7. External view of the electrical board of the K069-31561-1 device with incandescent lamps

K069_svetoprovod.png

Mounting seats 

for 5-volt lamps

Mounting seats

for 27-volt lamps

   The light guide is illuminated by five miniature incandescent lamps with bulbs of 3 mm diameter and an operating voltage of U = 5V, which illuminate the majority of the inscriptions with white light, and two miniature lamps with bulbs of 3 mm diameter and an operating voltage of U = 27V, which illuminate the inscription "ALT ALERT" yellow light (see Fig. 7 and 8).

 

   The illumination unit of this device in the initial state is not adapted to NVG.

Figure: 8. External view of the light conductor of the K069-31561-1 device with mounting seats for incandescent lamps

   To implement 5-volt lamps, miniature plastic cylindrical filters are used, shape of which is shown in Fig. 9.

   The filters are selected to sustain the color of the device as close to the original as possible.

   The transmission spectrum of a cylindrical filter is shown in Fig. 10.

Cyl_Radiant4PZK_GFD11.png

Figure: 9. Cylindrical IR filter for adapting the device illumination unit K069-31561-1

spektr_radiant4pzk.png

Figure: 10. Transmission spectrum of a cylindrical filter for adaptation of the illumination unit instrument K069-31561-1

   A flat IR filter on glass substrate is used to provide NVG compliance of the 27-volt lamps, its transmission spectrum is shown in Fig. 11.

spektrT_K069_ALT_ALERT.png

Figure: 11. Transmission spectrum of a flat IR filter for adapting of the inscription

"ALT ALERT" of the device K069-31561-1

Lighting characteristics of the K069-31561-1 device before and after adaptation

White lettering

Yellow "ALT ALERT"

 

9.3. Adaptation of the mode switch of the director system MS-700 (p / n 7000605-902). Manufactured by Honeywell Intl. Inc.

   The front panel of the MS-700 switch consists of a light guide with white lettering and Korry push-button lamps made by Esterline Technologies Corporation with yellow and green lettering (see Fig. 12 and 13).

MS-700_day.png
Korry_day.png

   The light guide is illuminated by twelve miniature incandescent lamps with bulbs of 3 mm diameter and an operating voltage of U = 5V (see Fig. 14 and 15). Each Korry button lamp is illuminated by two incandescent lamps with an operating voltage of U = 27V (see fig. 16). Illumination units of the MS-700 device in the initial state are not adapted to  NVG.

Figure: 12. External view of the MS-700 device in the "day" mode

MS-700_plata.png

5 volt lamps

Figure: 13. Appearance of the Korry button lamp

MS-700_svetoprovod.png

Mounting

seats

Figure: 14. External view of the electrical board of the MS-700 device with incandescent lamps

Figure: 15. External view of the light guide of the MS-700 device with Mounting seats for incandescent lamps

Korry_dismantled.png

Figure: 16. Disassembled appearance of Korry button lamp

   To adapt the light guide, miniature plastic cylindrical light filters is used, the shape of which is shown in  Fig. 17. Light filters are selected to keep the color of the device as close to the original as possible.

   The transmission spectrum of a cylindrical light filter is shown in Fig. 18.

Cyl_Radiant4PZK_MS-700.png

Figure: 17. Cylindrical IR filter for adapting the illumination unit of the MS-700 device

spektr_radiant4pzk (2).png

Figure: 18. Transmission spectrum of a cylindrical filter for adapting the illumination unit of the MS-700 device

  To provide NVG compliance of the Korry push-button lamps, flat IR filters on glass substrates were used.

  Their transmission spectra are shown in Fig. 19 and 20.

spektrT_Korry_green.png

Figure 19. Transmission spectrum of a flat infrared filter for adapting a Korry button lamp with green lettering

spektrT_Korry_yellow.png

Figure: 20. Transmission spectrum of a flat infrared filter for adapting a Korry button lamp with yellow lettering

Lighting characteristics of the MS-700 device before and after adaptation

White lettering on the light guide

Korry button lamps with green lettering

Korry push-button lamps with yellow lettering

 

9.4. Adaptation of the slide indicator 7003155-902 of the ED-800 flight controller. Manufactured by Honeywell Intl. Inc.

   Slide indicator 7003155-902 consists of two parts: a metal case with a sealed glass tube and an electric board with two incandescent lamps with bulbs of 3 mm diameter and an operating voltage of

U = 5V (see Fig. 21, 22, 23).

   The illumination unit of this device in the initial state is not adapted to the NVG.

TaSIndicator_7003155-902_korpus.png
TaSIndicator_7003155-902_day.png

Figure: 21. Exterior view of slide indicator 7003155-902 assembled

TaSIndicator_7003155-902_plata.png

Figure: 23. Electrical board of slide indicator 7003155-902 with two incandescent lamps

Figure: 22. Metal body of the slide indicator 7003155-902 with a sealed glass tube

TaSIndicator_7003155-902_plata_cyl.png

Figure: 24. Electrical board of the slide indicator 7003155-902 with glass-plastic cylindrical light filters

   To provide NVG compliance of the device, miniature glass-plastic cylindrical night vision filters are used, the shape is shown in Fig. 24.

   The transmission spectrum of a cylindrical light filter is shown in Fig. 25.

spektrT_BG39_2pzk.png

Figure: 25. Transmission spectrum of a cylindrical filter for adapting the sliding indicator 7003155-902

Lighting characteristics of the slide indicator 7003155-902 before and after adaptation to NVG

To adapt foreign devices to NVG, materials and technologies of Photooptic Ltd. are used.