Rockets Flashcards
LAU-61
19 x 2.75 in rocket pod
LAU-61 C/A motor restriction
Mk 66 motors only
RIPPLE timing
40 millisecond interval
LAU-130
all metal, 19 x 2.75 in rocket pod
LAU-61 vs LAU-130
LAU-130 lacks thermal protective coating
LAU-68 D/A
7 x 2.75 in rocket pod
Rotary Stepper Switch
19 position due to taken from LAU-61
LAU-68 C/A and LAU-131/A
7 x 2.75 in rocket pod, lacks thermal protective coating
How may positions on LAU-131/A rotary stepper switch?
10
LAU-68F/A
all-metal extended length launcher (ELL), 7 x 2.75 in rkt pod
Is LAU-68F/A approved for shipboard use?
Yes, has the thermal protective coating.
Is the LAU-68F/A restricted by weight?
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.
LAU-68F/A Shipboard Hot Tube Reloading?
NO!
LAU-68F/A Ashore Hot Tube Reloading?
Yep. Authorized.
Rocket Motor Components
“I pimp sisters nightly for fun” igniter, propellant grain, stabilizing rod, nozzle, fin assembly, firing contact disk/band.
How is it ignited?
28-Vdc distributed by launcher intervalometer to each tube firing contact
How does the propellant burn and why?
Inside out, to minimize CG shifts
WAFFAR
Wrap-around folding fin assembly (rocket)
Mk66 Mod 2 WAFFAR
HERO susceptible, tubular stabilizing rod, Mk 125 Mod 5 igniter, and a 5-wire HERO filter strung internally through the rod.
Mk 66 Mod 2 Avg Thrust
1,360 pounds for 1.1 secs
Mk 66 Mod 2 approx. weight
13.65 lbs
Mk 66 Mod 4
HERO safe, solid stabilizing rod, Mk311 igniter a set of filters in the igniter and a single filter under the nozzle contact band.
M151
HE-FRAG, (2.3 lbs Comp B-4), 9.4 lbs, bursting radius=10 m, soft steel or cast iron
M229
HE-FRAG, (4.8 lbs Comp B-4), 16.9 lbs,
Mk 152 Mod 0
HE-FRAG, (2.1 lbs PBXN-110), 8.9 lbs, soft steel or cast iron
WDU-4A/A
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
WDU-4A/A Optimum employment and why?
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.
How many tracers does the WDU-4A/A have?
3 tracers
Mk 149
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
HE-FRAG Warhead
M151, M229, Mk152 Mod 0