Rockets

Question 1

LAU-61

Answer 1

19 x 2.75 in rocket pod

Question 2

LAU-61 C/A motor restriction

Answer 2

Mk 66 motors only

Question 3

RIPPLE timing

Answer 3

40 millisecond interval

Question 4

LAU-130

Answer 4

all metal, 19 x 2.75 in rocket pod

Question 5

LAU-61 vs LAU-130

Answer 5

LAU-130 lacks thermal protective coating

Question 6

LAU-68 D/A

Answer 6

7 x 2.75 in rocket pod

Question 7

Rotary Stepper Switch

Answer 7

19 position due to taken from LAU-61

Question 8

LAU-68 C/A and LAU-131/A

Answer 8

7 x 2.75 in rocket pod, lacks thermal protective coating

Question 9

How may positions on LAU-131/A rotary stepper switch?

Answer 9

10

Question 10

LAU-68F/A

Answer 10

all-metal extended length launcher (ELL), 7 x 2.75 in rkt pod

Question 11

Is LAU-68F/A approved for shipboard use?

Answer 11

Yes, has the thermal protective coating.

Question 12

Is the LAU-68F/A restricted by weight?

Answer 12

Yes, if outboard stores are greater than 355 lbs, then the LAU-68 stores cannot exceed 240 lbs. (The appendix and content in NATIP differ) 240 lbs restriction, straight up.

Question 13

LAU-68F/A Shipboard Hot Tube Reloading?

Answer 13

NO!

Question 14

LAU-68F/A Ashore Hot Tube Reloading?

Answer 14

Yep. Authorized.

Question 15

Rocket Motor Components

Answer 15

“I pimp sisters nightly for fun” igniter, propellant grain, stabilizing rod, nozzle, fin assembly, firing contact disk/band.

Question 16

How is it ignited?

Answer 16

28-Vdc distributed by launcher intervalometer to each tube firing contact

Question 17

How does the propellant burn and why?

Answer 17

Inside out, to minimize CG shifts

Question 18

WAFFAR

Answer 18

Wrap-around folding fin assembly (rocket)

Question 19

Mk66 Mod 2 WAFFAR

Answer 19

HERO susceptible, tubular stabilizing rod, Mk 125 Mod 5 igniter, and a 5-wire HERO filter strung internally through the rod.

Question 20

Mk 66 Mod 2 Avg Thrust

Answer 20

1,360 pounds for 1.1 secs

Question 21

Mk 66 Mod 2 approx. weight

Answer 21

13.65 lbs

Question 22

Mk 66 Mod 4

Answer 22

HERO safe, solid stabilizing rod, Mk311 igniter a set of filters in the igniter and a single filter under the nozzle contact band.

Question 23

M151

Answer 23

HE-FRAG, (2.3 lbs Comp B-4), 9.4 lbs, bursting radius=10 m, soft steel or cast iron

Question 24

M229

Answer 24

HE-FRAG, (4.8 lbs Comp B-4), 16.9 lbs,

Question 25

Mk 152 Mod 0

Answer 25

HE-FRAG, (2.1 lbs PBXN-110), 8.9 lbs, soft steel or cast iron

Question 26

WDU-4A/A

Answer 26

2,205 20 grain flechettes, armed at accel greater than 17.5 g's, (assuming avg accel = 33 g's, armed=1.2 secs), fires when decel below 11 g's. 3 grams of M9

Question 27

WDU-4A/A Optimum employment and why?

Answer 27

1,200 m to 1,600 m. Because downrange travel is approx. 400-600 m, for a beaten zone of 80 x 80 meters. Optimum mil settings are 0 mils at 60 kts and -5 mils at 120 kts.

Question 28

How many tracers does the WDU-4A/A have?

Answer 28

3 tracers

Question 29

Mk 149

Answer 29

1,179 60 grain flechettes, firing pin is released which strikes a 55 mg PA515 Stab detonator, 3 grams of M9, optimum flechette pattern develops 150-250 meters after expulsion

Question 30

HE-FRAG Warhead

Answer 30

M151, M229, Mk152 Mod 0