Rockets

Question 0

LAU-68

Answer 0

• 7 Shot pod
• Weighs 85#
• MK 66 motor only, no mixed warheads
• Thermal Protective Coating
• Equivalent to LAU-131 (131: No thermal protection, no shipboard use)

Question 1

LAU-61

Answer 1

• 19 Shot Pod
• Weighs 155#
• MK 66 motor only, no mixed warheads
• Thermal Protective Coating
• Equivalent to LAU-130 (130:No thermal protection, No shipboard use)

Question 2

MK 66 Motor

Answer 2

• 1415# Thrust for 1.1 Sec
• 5 Parts:
  1. ) Igniter
  2. ) Propellant grain (star perforated for constant thrust) with salt coated stabilizing rod (prevents unstable/flash burn)
  3. ) Fluted Nozzle
  4. ) Wrap Around Folding Fin Arial Rocket (WAFFAR) assembly
  5. ) Firing Contact Disk/Band

Question 3

MK 66 Mod 2

Answer 3

• HERO Filter (Hazards of Electro-Magnetic Radiation to Ordnance)
  
  • Prevents inadvertent motor ignition
  • Still HERO susceptible
  • Approved for shipboard ops, (Emergency use only)
• MK 125 Mod 5 Igniter

Question 4

MK 66 Mod 3

Answer 4

• Army AUR (All Up Round)
• Warhead comes pre-attached
• NOT HERO SAFE
• NOT APPROVED FOR USMC/NAVY USE

Question 5

MK66 Mod 4

Answer 5

• Completely HERO Safe
  
  • Stabilizing rod improvement
• Can be hot tube loaded
• MK 311 Ignitor

Question 6

5 Types of Warheads

Answer 6

1. ) Practice (Inert)
2. ) HE-Frag
3. ) Flechette
4. ) Illumination
5. ) Smoke

Question 7

WTU-1/B

Answer 7

Type: Inert training round

-Same ballistic characteristics as the M151

Question 8

M151

Answer 8

Type: HE FRAG
Charge: 2.3# Comp B-4
Burst Rad: 10m
Warhead Wt: 9.4#
Rocket Wt: 23.2#
Fuze: 423/427

Question 9

M152 Mod 0

Answer 9

Type: Insensitive Munition (IM) HE FRAG
Charge: 2.1# PBXN-110
Burst Rad: 14/17m
Warhead Wt: 8.9#
Rocket Wt: 23.05#
Fuze:  MK 435 Mod 0

Question 10

M229

Answer 10

Type: HE-FRAG
Charge: 4.8# Comp B-4
Warhead Wt: 16.9#
Rocket Wt: 30.6#
Fuze: M423

Question 11

Mk 146 Mod 0

Answer 11

Type: Insensitive Munition (IM) HE-FRAG
Charge: 4.3# PBXN-110
Warhead Wt: 16.6#
Rocket Wt: 30.30#
Fuze: Mk 435 Mod 0

Question 12

WDU-4 A/A

Answer 12

Type: Flechette
# Flechettes: 2,205 20 Grain
Charge: 3g M9 Double Base
Beaten Zone: 80mx80m                              
Fuze Functions at: 400-600m                    **Red Paint & 3 Tracers**
Optimum Employment: 1200-1500m
Fuze: M133A
Weight: 23.1#

Question 13

MK 149 Mod 0

Answer 13

Type: Flechette Red Paint & 3 Tracers
# Flechettes: 1,179 60 Grain
Charge: 3g M9 Double Base
Fuze: M113A
Rocket Weight: 27.55#
Recommended Employment: 1@900m, Ripple @800-600m

Question 14

MK 67 Mod 1

Answer 14

Type: Smoke (Red Phosphorus)        **No Special Handling Required**
Charge: PBXN-202
RP Weight: 2.6#
Rocket Wt: 23.29
Fuze: MK 427 or MK 352 Mod 2

Question 15

MK 156

Answer 15

Type: Smoke (White Phosphorus)
Charge: Comp B-4
WP Weight: 2.0#
Rocket Wt: 23.5#
Fuze: MK427

Question 16

M257

Answer 16

Type: Overt Illum
Illum: 1,000,000 Candle Power
Burn Time: 120 sec
Avg Descent: 13-15 ft/sec
Fuze: M442
  -Time delay of fuze: 9 sec
  -Total time from motor ignition to flare illum: 13.5sec
Rocket Wt: 24.6#

Question 17

M278

Answer 17

Type: Covert Illum
Illum: 700 CP (1,000,000 NVG) 
Burn Time: 180 sec
Micron Range: 0.7-1.1 with peak at 0.8 microns
Fuze: M442
  -Time delay of fuze: 9 sec
  -Total time from motor ignition to flare illum: 13.5sec
Rocket Wt: 24.9#

Question 18

Three types of rocket fuzes

Answer 18

1. Impact (Point Detonating)
2. Mechanical Time (Base Detonating)
3. Accel / Decel (Base Detonating)

Question 19

M423

Answer 19

Type: Impact / Point Det
Arms Req: 
    -20g's Sustained
    -140-300ft
    -.63-.82 sec
**Slow speed aircraft only

Question 20

M427

Answer 20

Type: Impact / Point Det
Arm Req:
    -20g's Sustained
    -800-1250ft
    -1.09-1.34 sec

Question 21

Model 113/A

Answer 21

Type: Accel / Decel (Base Det)
Arm Req:
    -Arms @ 17.5g's (Sustained)
    -550-1400ft @ 1.6 sec (warhead dependent)
    -Fires at 11g's

Question 22

M442

Answer 22

Type: Mechanical Time
Arm Req:
    -16g's
    -2137 ft
    -1.0 sec
Fuze Time Delay: 9 sec (From arming)

Question 23

Mk 435 Mod 0

Answer 23

Type: Impact / Point Det

• Navy’s IM version of the M423
• Arm Dist: 43-92m
• *Helicopters only

Question 24

M352

Answer 24

Type: Impact / Point Det
Arm Req: 20g's Sustained
    -800-1200ft
    -1.07-1.36 sec 
**For use with 2.75" or 5" Rockets

Question 25

2.75” HE Rocket Danger Close

151/229/146

Answer 25

Firing Range : Danger Close (Standing)
300m : 140m
800m : 210m
1500m : 305m

Question 26

APKWS Danger Close

Answer 26

Firing Range : Danger Close (Standing)

All Ranges : 95m

Question 27

Flechette Danger Close

Answer 27

Firing Range : Danger Clsoe (Standing)

1000m : 170m

Question 28

90 Mil Rocket Profile ROT

Answer 28

20 deg Dive @ 1500’ = 1.1km from target

30 deg Dive @ 1500’ = 0.7km from target

Question 29

Illum Delivery ROT

Answer 29

M257 Overt:
-19* nose up = 1800’ flare alt above aircraft, 3500m down range
M278 Covert:
-26* nose up = 2500’ flare alt above aircraft, 3000m down range
General ROT:
(+/-) 1* nose elev = +/- 150’ flare elev change
(+/-) 1* Azmth chng = L/R 63m
-Flare Descent Rate: 13-15 ft/sec
-SpentMotor: 700 - 1000m downrange beyond flare.

Question 30

ROT for Illum Wind Correction

Answer 30

10kts crosswind = 5* into wind
10kts tailwind = 300m prior to planned firing point
10kts headwind = 300m beyond planned firing point

Question 31

1 Full LAU-68 weighs…

Answer 31

1 Full Pod weighs…
M151: 247#’s (162# of rockets)
M149: 278#’s (193# of rockets)
APKWS: