DM Antenna TechnologiesAIL Systems Inc.

455 Commack Road Deer Park, NY 11729-4591631-595-6000 Fax 631-595-6180

http://www.ail.com

1000-111 (M69)

DM NI50 ANTENNAS

Reduced maintenance costs are achieved through the use of this low-profile, all-metal blade as a result of its unequalledmechanical strength and built-in reliability. Currently in use on business, commercial and military jet aircraft, the DM NI50antennas have clear advantages over the other current designs:

Extremely high side load strength guards against breakage by ground handling gear. Completely sealed construction prevents failure from moisture intrusion. Lightning protection circuits prevent damage to antenna and safeguard electronic equipment.

DM NI50 antennas, which replace the DM NI49 antennas, are used with all standard L-Band equipments because of theirvery broad bandwidth of 960 to 1,220 MHz.

Models of the DM NI50 antenna are directly interchangeable with virtually all L-Band blade and flush mounting antennascurrently in service on commercial and military aircraft. While some replacements will require the use of standard adapterplates which are readily available, none require airframe modification. (See Table 1).For applications on lower speed aircraft or where this antennas extremely high strength is not required, see data on the lowercost DM NI24. For applications where flush antennas are required, see the DM NI7 data sheet.

SPECIFICATIONS

ELEC

TRIC

AL

MEC

HA

NIC

AL

Frequency Range 960 1220 MHzVSWR 960 1220 less than 1.7:1

1000 1100 less than 1.5:1Gain Average at horizon 0 dBPolarization VerticalImpedance RF 50 Ohms

dc Short CircuitPower 3 kW peak

100 W peak

Weight 4 ozOutline Dimensions See Figure 1

See Figure 2 for DM NI50-8Finish See color chart

Areo Drag, Sea Level, Mach 0.5 2 ozSea Level, Mach 0.8 4.5 oz

Side Load Will withstand 175 lbsMilitary MIL-T-5422EARINC (ATC Transponder) 532 E

(DME) 521 DFAA (ATC Transponder) TSO-C74

(DME) TSO-C66a

ENV

IRO

NM

ENTA

L

NAVIGATION

54

32100.0 0.2 0.4 0.6 0.8 0.9

DR

AG IN

(OZ)

MACH NUMBER

SEA LEVEL8,000 FT10,000 FT20,000 FT

CALCULATED DRAG vsSPEED OF DM NI50 ANTENNA SERIES

OUTLINE DIMENSIONSInches (Centimeters)

DM NI50 ANTENNAS

TABLE 1. MOUNTING DATA FOR DM NI50 ANTENNAS

ANTENNATYPE

MATINGCONNECTOR

TYPEATTACHING*HARDWARE

DM NI50-2DM NI50-3DM NI50-4DM NI50-6DM NI50-8DM NI50-9DM NI50-10DM NI50-15DM NI50-16DM NI50-19

C MALEC MALEHN MALEN MALEHN MALETNC MALEN MALEC MALEN MALEC MALE

NO. 10 SCREWNO. 6 SCREWNO. 6 SCREWNO. 6 SCREWNO. 10 SCREWNO. 10 SCREWNO. 6 SCREWNO. 10 SCREWSEE NOTE 1NO. 6 SCREW

HARDWARECLEARANCEQTY

46664464

6

0.213 IN.0.171 IN.0.171 IN.0.171 IN.0.213 IN.0.213 IN.0.171 IN.0.213 IN.SEE NOTE 10.171 IN.

Notes: 1. Mounting configuration and holes to be as specified and installed by customer for DM NI50-16.2. The DM NI50 are L-Band blade antennas. The first dash number indicates a physical difference, i.e., connector type or

mounting configuration. The second dash number indicates antenna color. For example, the DM NI50-2-1 has a -2which indicates a Type C female connector with No. 10 mounting screws in 4 places. The -1 indicates that the coloris international orange. The DM NI50-3-2 has a -3 which indicates a Type C female connector with No. 6 mountingscrews in 6 places. The -2 indicates that the color is glossy white.

3. DM NI50-16 and DM NI50-19 have no color finish.

COLOR CHART

-1-2-3-4-5-6

-16-19

INTERNATIONAL ORANGEGLOSSY WHITELUSTERLESS WHITELUSTERLESS BLACKLUSTERLESS GREYGLOSSY REDSEE NOTE 3SEE NOTE 3

* ATTACHING HARDWARE TO BE STAINLESS STEEL

FINISHSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE COLOR CHARTSEE NOTE 3SEE NOTE 3

FIGURE 1

FIGURE 2

+ +

+ +

+SIX HOLE BASECONFIGURATIONFOUR HOLE BASECONFIGURATION

2.200.125

1.108

40

0.825

3.600

1.800

1.250

2.250

3.250

4.500

5.25

0.980

0.490

0.375

0.625

1.250

1.75

4.125(104.775)

0.842(387)

0.421(10.963)

0.826(20.980)

2.900(73.660)

0.708(17.983)

1.416(35.96)