sdz construction: aviation rocketry

SDZ Construction:Aviation RocketryInter-service Resident Range Safety Course (Intermediate)

August 2003

The 2.75 FFAR (Folding Fin Aircraft Rocket) has an air-to-ground role and is fired from fixed and rotary wing aircraft. Its fuzing and warhead performance characteristics make it suitable for low-speed aircraft.

August 2003

AH-64 Apache Helicopter

August 2003

August 2003

Weapon:

Ammo Type:

Direction of Fire:

Launcher Quadrant Elevation:

Aircraft Pitch:

Mode of Fire:

Distance X:

Legend for Aviation Gunnery (Rockets)Area A:

Area B:

Map Scale:

Map Sheet:

Map Series:

Map Edition:

Date:

Name:

August 2003

Constructing the SDZConstruct an SDZ for the 2.75 FFAR rocket with a MK66 motor fired into steel from an aircraft with a pitch -5° and launcher quadrant elevation of 95 mils.

Dimensions of the SDZ parameters for this weapon system are given in Chapter 13, pages 13-5 and 13-6.

August 2003

Constructing the SDZFor aerial rockets, the launch angle in degrees, equals launcher QE in mils divided by 17.7 plus the aircraft pitch in degrees. For articulating launchers, use the maximum articulated QE possible plus the aircraft pitch in degrees.

August 2003

Launch Angle is computed as follows:Launch angle (in degrees) =

+ Aircraft Pitch (in degrees)17.7

Launcher QE (in mils)

Launcher QE = 95 mils

17.7= 5.36° (ˆ6°)

6° - 5° = 1° (ˆ2°) Launch angle = 2°

August 2003

Establish the right and left lateral limits.

Plot the target.

Locate the Cease-Fire Disarm Line.

Locate the Start-Fire Safe-Arm Line.

Start-FireSafe-Arm Line

Cease-Fire Disarm Line 1000m

August 2003

From Table 13-1, find Distance X as measured from the cease-fire disarm line.

Distance X = 4500m

Annotate Distance X on the legend.

At the start-fire line, measure 5° with a protractor from the left and right lateral limits to establish the Dispersion Area.

5°5°



Dis

tan

ce X

August 2003

Draw tic marks as shown.

To establish the Dispersion Area, draw a straight line from the firing position through each tic mark out through Distance X.

This completes the Dispersion Area.

5°5°

DispersionArea



Dis

tan

ce X

August 2003

At the start-fire line, measure 10° with a protractor from the left and right limits of the firing line to establish the Ricochet Area.

Draw tic marks as shown.

To establish the Ricochet Area, draw a straight line from the firing position through each tic mark out through Distance X.

10°10°1000m

DispersionArea



Dis

tan

ce X

August 2003

This completes the Ricochet Area.

At the left limit of the start-fire line, scribe an arc between the left limit of the Ricochet Area and the left lateral limit. Use Distance X as the radius. Do the same on the right side.

10°10°

DispersionArea

RicochetArea



Dis

tan

ce X

August 2003

At Distance X, draw a straight line between the right and left limits of the start-fire line.

Erase any unnecessary lines.

DispersionArea

RicochetArea



Dis

tan

ce X

August 2003

The measurement for Area A = 300m.

Lightly draw lines perpendicular to the limits of the Ricochet Area.

DispersionArea

RicochetArea



At Distance X, draw a straight line between the right and left limits of the start-fire line.


Dis

tan

ce X

August 2003

Draw tic marks at the measurement for Area A.

Draw straight lines parallel to the limits of the Ricochet Area through the tic marks just drawn. Dispersion

Area

RicochetArea



Dis

tan

ce X

August 2003

At the firing position, measure 25° with a protractor from the left and right limits of the Ricochet Area to establish the Area A.

Draw tic marks.

25°25°

DispersionArea

RicochetArea



Dis

tan

ce X

August 2003

From the start-fire, draw straight lines through the tic marks just drawn.

The measurement for Area B = 300m

Lightly draw lines that extend the firing lines from Distance X by the measurement for Area B. 25°25°

DispersionArea

RicochetArea



Dis

tan

ce X

August 2003

From the right and left limits of the firing line, scribe an arc from the right and left limits of Area A using the measurement for Area B as the radius.

At the measure-ment for Area B, connect the right and left limits of the firing lines with a straight line.

25°25°

DispersionArea

RicochetArea



Dis

tan

ce X

August 2003

DispersionArea

RicochetArea



25°25°

This completes Areas A and B.

Dis

tan

ce X

August 2003

DispersionArea

RicochetArea

Area A

Area B



To complete this portion of the SDZ, erase all unnecessary lines.


Annotate Areas A and B on the legend.

Dis

tan

ce X

August 2003

This SDZ has a Maneuver-Holding Area which will now be shown in detail.

To complete this portion of the SDZ, erase all unnecessary lines.

DispersionArea

RicochetArea

Maneuver-HoldingArea

60°


Annotate Areas A and B on the legend. Area A

Area B



Dis

tan

ce X

August 2003

In this illustration, the Maneuver- Holding Area extends 1km behind the start-fire line. This distance is variable.

Extend the firing lines back the distance of the Maneuver-Holding area.

At the firing lines, measure back 60°.

60° 60°

1km

August 2003

1km

Draw tic marks.

Draw straight lines through the tic marks. 60° 60°

August 2003

From the firing line, draw arcs out to the limits of the Maneuver-Holding Area.

This completes the Maneuver-Holding Area.

60° 60°


1km

Close the area as shown.

August 2003

From the firing line, draw arcs out to the limits of the Maneuver-Holding Area.

This completes the Maneuver-Holding Area.


1km

August 2003

Weapon:MK66 Rocket Motor

Ammo Type: M151 Warhead

Direction of Fire: 360 grid

Launcher Quadrant Elevation:

95 mils

Aircraft Pitch: -5°

Launch Angle: 2°

Mode of Fire: Running fire

Distance X: 4500m

Legend for Aviation Gunnery (Rockets)Area A: 300m

Area B: 300m

Map Scale: 1:50,000

Map Sheet:

Map Series:

Map Edition:

Date:

Name:

sdz construction: aviation rocketry

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