stores carriage and release 7305 Flashcards
lable the EMAU how does the EMAU prevent back EMF what load will cause arming wire to pull out?
fed by a 28v Dc supply
the EMAU has a diode between the + & - terminals prevents back emf to dissipate power quickly
when de-energised it will take a load of 8-16lbs to pull out the arming wire
lable the emru
what load can it carry and how does it differ from other systems
carries upto 1000lbs
uses a cruchless (MACE) system operated electronicaly or manually
12 specs: swiss firs &djs
state the specificiations an armament system must conform to
- no single fault or failure shall adversley the safe operation of the system
- dual redundency of power supplies
- armamant electrical power indicated to crew
- emergency or selective jettison
- emergency jettison needs to operate during complete power failure
- protection against inadvertant firing or release of weapons
- all cable need to be red
- armament wiring should not run through non armament junction boxes or be assembled with non armament cables
- different shell orientation must be used
- indication of failed stores release to aircrew
- a fixed wing undercarriage switch must be provided for arming jettison and release
- cable splices must not be used to repair or join armament cables
what function does the ground lock safety pin perform?
the GLSP helps to enforce the correct locking position of the geometric lock and ensures the geometric lock doesn’t inadvertantly open
what does the common carrier provide
they provide a
- strong and secure housing for the release units
- and supply services for the different weapons and devices
7 services
what services does the common carrier provide?
- access to the release unit for cocking, release and insertion or removal of safety devices
- electrical services to the release unit
- electrical services to the weapon
- a platform or facility for AGSE
- weapon lanyard strongpoint
- housing for nose and tailarming units
- cable for weapons data transfer
explain and describe the master armament switch
- isolates all armament circuits from AC and DC supplies
- has two positions live and safe when not used with auxilary armament supplies
- if used with auxilary supplies has 3 positions live, safe and standby. power supplies isolated for release and firing circuits in safe and standby, auxilary supplies isolated in safe
- with two or three position switches the live must be gated to prevent inadvertent release
- must be able to see that the mass is not live from the ground. SAFE (green), STBY (amber)
Define jettison?
in an emergency the pilot must be able to release stores in a safe condition.
either singularly (by selection) or totally (clear wing)
what are the key specs of a HUW
can lift 550kg (1212lbs)
25: 1 ratio of knurled side 1:1 on flat side
1: 1 side is for realing in only
25: 1 side is for loading unloading
if lifted load exceeds 120% of SWL the clutch will slip
knurled ring is for pulling out by hand only
what is a safety break?
- a means of isolating the stores from the aircraft circuit when on the ground,
- connected immediatly prior to tak eoff
- and has a connection for carrying out ‘NO-VAULTS’ test, release and jettison checks
what are the checks for a HUW?
broken wires
internal/external wear
rusting
bird-cageing
cable should be lubed with omd 90
maintenance signed for in the 755E
describe how we check a no-vaults test BIT
continuity check the cable and pins
connect the cable and test BIT test up/down direction of the circuit
check the 755B for serviceability every 6 month ashore 28 days at sea
check kit twice
arrow moves between green and yellow
once connected there should be no movement of the arrow
describe the operation of a no-volts test
- test both selections of kit ensure arrow moves from green to yellow
- connect to test point in circuit use appropriate lead
- when connected should be no movement of pointer, indicating zero volts in circuit
- disconnect from circuit and do a BIT on no-volts kit
- if it failes new kit is needed
freight lifting precautions
- use an earthing pole
- use rubber gloves
- wea protective head gear
- obey all commands from commander
- ensure that the jettison controls have been reset correctly
describe electric release
when rotary solenoid is energised, the solenoid lever is rotated and the link raises the internal lever, breaking the geometric lock between the internal lever and toggle link.
the latch hook is then rotated and releases the load beam provided a load in excess of 8lbs is on the load beam, the beam will open.
when the internal lever is raised, it operates a microswitch breaking the release circuit and making the indicator circuit to the release light in the cockpit
