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6 Cards in this Set
- Front
- Back
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what is the function
its location modes of operation and control supporting input signals that are required |
Armament system [ref. b, p. VIII-18-1] A
a. Cartridge Actuated Devices (CADS)/pyrotechnic: 1. Hoist (M514) [ref. a, p. 2-116] A B C E - Hoist (M514) - Is used to actuate a helicopter hoist cable cutter (on the rescue hoist) to release the steel hoist cable and its load during an emergency. 2. Cargo hook (MS20/MJ21) squib [ref. b, p. I-2-102] A B C E - Cargo Hook (MS20/MJ21) squib - Releases the hook and holds it in the open position when fired to release the load during emergency. Installed on the cargo hook assembly. 3. Fire bottle (MH92) [ref. a, p. 2-337] A B C D E - Fire Bottle (MH92) - Is used to release fire-extinguishing agent into the area surrounding an aircraft engine in the event of a fire. Installed on each fire bottle assembly. Safeties are supplied by; circuit breakers, weight-on-wheels (WOW) circuitry, and operator caution. In-flight failure of the above CADs to fire could result in death of aircrew and loss of aircraft due to hung load or aircraft fire mishap. |
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what is the function
its location modes of operation and control supporting input signals that are required |
b. M240D machine gun [ref. b, p. VIII-18-1] A B C D - To provide airborne defensive weapons capability, to the aircrew, in a low level overland or over water operating environment.
Two are carried by the MH-605. One positioned in each gunner's window. They are free-pointing, but limited in traverse, elevation, and depression fields of fire (prevents accidental damage to aircraft components). Fires the standard 7.62 mm NATO cartridge from the open bolt position at firing rates up to 950 rounds/minute depending operator selection. The weapon is configured with a safety. Numerous indications of weapons failure include: jammed chamber or barrel and broken internal components preventing firing. |
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Describe the basic operation of the M240D machine gun
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By squeezing the weapon trigger, the function cycle is initiated. This sequence includes: ammo feeding, chambering, locking, firing, unlocking, extracting, ejecting, and cocking. The cycle is maintained by both the force of springs and the gas pressures built up during the firing of each round.
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M240D machine gun
What is the weight? What is the length? What is the firing rate? |
Weight: 25.6 pounds (barrel approx. 6.6 lbs)
Length: 49 inches Rate of fire: Cyclic, 650-950 rounds/minute -change barrel every minute Sustained, 100 rounds/minute -(4-5 seconds between bursts) -change barrel every ten minutes Rapid, 200 rounds/minute -(2-3 seconds between bursts) -change barrel every two minutes |
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what safety precautions apply to hoist, cargo hook, and fire bottle
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CADs are to be handled only by qualified/certified personnel. Handle as live ammunition. Installation and removal must be accomplished on a non-energized and properly grounded aircraft. When not installed, CADs must be stored in a CAD container (temporary), or at an RSL (Ready Service Locker).
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what safety precautions must be observed when operating the M240D machine gun
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The M240D machine gun is to be handled only by those ordnance qualified/certified, and/or by qualified operators. Ensure weapon is clear and safe. The function check shall not be done with live ammunition. Keep barrel of weapon pointed away from personnel at all times to avoid death or injury.
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