Navedtra 14313A, AO, chapter 2,9 Flashcards
A misfire that later fires from delayed ignition
Hang fire
Initiating device that ignites the propellant grain.
Igniter
The result when a rocket does not fire when the firing circuit is energized
Misfire
The propulsive component of a rocket . It consists of the propellant , the igniter and the nozzle
Motor
The solid fuel used in a rocket motor , which upon burning , generates a volume of hot gases , that stream from the nozzle and propel the rocket
Propellant grain
A weapon propelled by the sustained reaction of a discharging jet of gas against the container of gas
Rocket
The term applied when internal parts react to the acceleration of the rocket
Setback
The force exerted by the gases produced by the burning of the rocket motor propellant
Thrust
The Venturi-type nozzle does what
Decrease the turbulence of escaping gases and increases the thrust
Gas pressure provides about ____ percent of the force , and the escaping gases provide about ____ percent of the force necessary to move the container forward
Gas pressure (70%) and escaping gas (30%)
What are the three major components of a rocket
The motor , warhead , fuze
What rocket motor is used with the 2.75” and 5.0” rockets
2.75” -MK 66 and 5.0” -MK 71
What is an internal burning , star perforation , double base solid propellant
The propellant grain
What restricts or controls burning of the propellant surface
Inhibitor
What component is salt coated to prevent unstable burning of the propellant
Stabilizing rod
What hears the propellant grain to ignition temperature
Igniter (contains black powder and magnesium)
What is ALWAYS required to cover the ignition contact band until the rocket is actually loaded into the launcher
Metal shielding band
What prevents fins from closing on rockets
The cross head
What causes the rocket to spin during free flight
Flutes
What permits rockets from being launched from high speed aircraft
Flutes that cause the rocket to spin
When not installed in the launcher , what holds the fins in place
Fin retainer band (not interchangeable with shielding band)
For specific component information on rockets , you should refer to what publication
Aircraft Rocket System 2.75” and 5.0” , NAVAIR 11-75A-92
High explosive warheads contain what high explosive material
Comp-B
Base fuzes are installed at the factory and should be removed when
NEVER
What type of warhead is used against personnel and light material targets such as trucks and parked aircraft
High explosive fragmentation (HE-FRAG) warheads
What warhead combines the effectiveness of the HE-FRAG and high explosive antitank (HEAT) warhead
Antitank/antitank warhead
What warhead is a compromise between the armor piercing and the fragmentation designs
General purpose(GP) warhead (max penetration is obtained by using solid nose plug)
What is the only GP warhead currently in use
The MK 24 Mods 0 and 1
What warhead contains a large number of small arrow shaped projectiles
Flechette warhead , WDU-4A/A
Rocket fuzes are classified
There location in the warhead . (They are further classified by mode of operation , such as impact-firing; mechanical-time; acceleration and deceleration; or proximity
What is the only Mechanical time rocket fuze in use
MK 193 Mod 0
What is the only acceleration -deceleration fuze currently in use by the navy p
The Model 113A
Some rocket fuzes designed for use with the 2.75” warheads can be used with the 5.0” warhead what adapter
BDU-15/B adapter booster
The Wrap-Around Folding Fin Aircraft Rocket(WAFFAR) is fired in large numbers to produce a shotgun pattern and are carried and launched from what launch packages
7 or 19 round tube launcher packages
How many shots does the 2.75@ LAU 68 fire
7 shot
How many shots does the 2.75” LAU 61 fire
19 shots
How many shots does the 5.0” LAU 10 fire
4 shot
What is the suspension of the 2.74” and 5.0” rocket launchers
2.75”=14” suspension only / 5.0”=14-30” suspension
What is a multipurpose arrangement that consists of a shockpan assembly , a shockpan cover assembly and or locking ring assembly
Shipping ends
What are the rocket launchers made of and are they reusable
Made of aluminum and they are resusable
What save arm device prevents loaded rockets from firing
The breaker switch
If the mode selector switch is in the RIPPLE fire position , the intervalometer converts the firing pulse into a ripple purse and successively fire all rockets at what intervals
95-milliseconds interval
The intervalometer should NOT be manually rotated through the numbered positions except when
When checking empty pod
What is the weight of the LAU-19 rocket launcher
500-550 lbs
What adapter is used to test rockets
W2 adapter
The rockets are retained in the 5’0” launcher tubes during shipping , handling and flight by engagement of what
Spring loaded detent pawl in the rocket detent groove
What rocket launcher tester is currently in use
MK III rocket launcher tester
Rockets produce what type of hazard
Fire hazard
Rocket motors should be stowed in the same manner as what
Smokeless powder
If rocket motor is dropped at any distance what must be done
It should not be used , notify EOD if needed
What can happen if the rocket motor is dropped
Cracks or breaks in the grain increase the carefully calculated burning are and will cause excessive internal pressure buildup , which can cause the motor to blow up after ignition
Smoking is not permitted in the loading area within how many feet of rockets
200 feet
Fuzes and warheads dropped more than how many feet must not be used
If dropped more than 5 feet don’t use
To prevent possible explosion , airborne rockets or loaded launchers should NOT be exposed to the exhaust from jet engine started pods or gas turbine compressors within how many feet
10 feet
