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The B-52A was the first to be fitted with defensive armament - the A-3A Defensive Fire Control System (DFCS) was operated by a tail gunner, seated in the rear of the plane underneath a transparent canopy. The system utilized a battery of four .50 caliber M3 machine guns in a hydraulically controlled and gyroscopically stabilized gun turret in the extreme tail. Each gun had 600 rounds of ammunition. The system also employed separate search and track radars and provided automatic lead angle computation for the guns. As an alternative, the gunner also had an optical gun sight for manual operation of the guns.
Nine of the first ten RB-52Bs (52-004/008 and 52-010/013) used the A-3A DFCS. Gopanel 2 8 5 qt. RB-52B (52-0009) was fitted with the alternative MD-5 DFCS which incorporated a pair of M24A-1 20-mm cannons in place of the quad .50 calibers. This system was adopted as standard equipment on the remaining 17 RB-52Bs and 16 B-52Bs (52-8710/8716 and 53-0366/0391). The new system proved to offer no real improvement and the last seven B-52Bs reverted back to the original A-3A system of four machine guns with a supposedly improved A-3A DFCS. However, in reality, many of the problems remained.
The defensive armament of the B-52C comprised a battery of four .50 caliber machine guns, just as it had on most of the B-52Bs. All but one of the B-52Cs used the supposedly improved A-3A DFCS that had been used on the last seven B-52Bs. Unfortunately, the A-3A was itself less than fully reliable, and the last B-52C (54-2688) was fitted with an improved MD-9 DFCS which continued to utilize the quad .50 caliber gun turret. Filmconvert pro for adobe photoshop 1 07 crack.
The B-52D through F models all incorporated the MD-9 DFCS. Firefox twitch lag.
In the B-52G, the gunner was moved from the rear of the aircraft to a position beside the electronic warfare officer in the forward part of the fuselage. He was provided with a rearward-facing upward-firing ejector seat. Fresh 2 8 4 – file managing applications. A new Avco-Crosley AN/ASG-15 DFCS was fitted in the tail to support the now remotely-operated, rearward-firing gun turret. Like earlier versions of the DFCS, the AN/ASG-15 featured separate radar dishes for search and track, but it also carried a television camera. The gunner could operate the .50 caliber guns by using the AN/AGS-15 DFCS in an auto mode that used the radars to search and track targets and a computational system to aim the weapons, or manually where he monitored approaching threats either by radar or by closed-circuit television and aimed the weapons with hand controls.
The B-52H uses the AN/ASG-21 DFCS utilizing the GE M61A1 20mm cannon; a 20-mm six-barrel rotary cannon. Though both the AN/ASG-15 and AN/ASG-21 were designed to accomplish the same task, they were nonetheless very different in their design and operation. The ASG-15 had more than 20 modes of operation while the ASG-21 had just four. The AN/ASG-15's .50 caliber machine guns were also prone to jam while the AN/ASG-21 GE weapon rarely did. Similar to the DFCS employed on the B-58 Hustler, the B-52H's AN/ASG-21 featured two radars in its DFCS. In the mid-1980's, Emerson upgraded the ASG-21 to a totally digital system with the exception of three tubes. Yate client.
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What is the M2 .50 Cal machine gun used for?
Defendagainst low-flying hostile aircraft, support the infantryman in both attack anddefense, destroy lightly armored vehicles, provide protection for motormovements, vehicle parks and train bivouacs, and reconnaissance by fire onsuspected enemy positions
What is the weight of the M2 .50 Cal machine gun?
3
FM3-22.65
What is the importance of correct head space adjustment on the .50 Cal machine gun?
Incorrect head space adjustment can cause a malfunction of the gun and lead to sluggish operation or failure to function freely.
What is the length of the barrel of the .50 Cal?
6
6,764meters
What is the muzzle velocity of the .50 Cal?
8
What is the description of the .50 Cal, HB, M2 Machine Gun?
The Browning machine gun caliber .50 HB, M2 is a belt-fed, recoil-operated,air-cooled, crew-served machine gun. The gun is capable of single shot, as well as automatic fire, and operates on the short recoil principle.
What is the maximum effective range of the .50 Cal against point and area targets?
Point targets Single shot- 1,500 meters
Area shot- 1,830 meters
To control the rate of fire on the M2, the gunner may use what methods of fire?
11
Describe the Single Shot method of fire on the M2 .50 Cal.
Place the gun in the single-shot mode and engage the target with aimed shots. The machine gun is accurate out to 1,500 meters.
Describe the Slow method of fire on the M2 .50 Cal.
Slow fire consists of less than 40 rounds per minute, in bursts of five to seven rounds, fired at 10- to 15-second intervals.
Describe the Rapid method of fire on the M2 .50 Cal.
Rapid fire consists of more than 40 rounds per minute, fired in bursts of five to seven rounds, at 5- to 10-second intervals.
Describe the Cyclic method of fire on the M2 .50 Cal.
Cyclic fire is when the weapon fires 450 to 550 rounds per minute.
What is the length of the .50 Cal, overall?
16
What is the cyclic rate of fire of the M2 .50 Cal?
17
What type of front sight does the M2 .50 Cal have?
18
What type of rear sight does the M2 .50 Cal have?
A leaf type rear sight graduated in both yards and mils
What are the common malfunctions of the M2 .50 Cal?
Photoline 21 50 Cal Machine Gun
Failure to function freely
Uncontrolled automatic fire
What are the common stoppages of the M2 .50 Cal?
Failure to feed
Chamber
Lock
Fire
Unlock
Extract
Eject
Cock
What are the ten major components and assemblies of the M2 .50 Cal?
Barrel Group
Carrier Assembly
Back plate Group
Receiver Group
Bolt Stud
Cover Group
Barrel Buffer Body
Barrel extension group
Bolt Group
Driving Spring Rod Assembly
What are the proper procedures for performing immediate action on the M2 .50 Cal?
Photoline 21 50 Caliber
If machine gun fails to fire, take the following action:
Photoline 21 50 Cal Ammo
Wait 5 seconds; a hang fire may be causing the misfire. In the next 5 seconds, pull the bolt to the rear (check for ejection and feeding of belt), release it, re-lay on the target, and attempt to fire. If the bolt-latch release and trigger are depressed at the same time, the bolt goes forward and the weapon should fire automatically.
If the gun again fails to fire, wait another 5 seconds, pull the bolt to the rear (engage with the bolt latch if applicable), and return the retract ing slide handle to its forward position. Open the cover and remove the belted ammunition. Inspect the gun to determine the cause of stoppage.
A hang fire or cook off can cause injury to personnel or damage to the weapon. To avoid these, the gunner must take the following precautions:
Photoline 21 50 Cal Ammo Cans
Always keep the round locked in the chamber the first 5 seconds after a misfire occurs. This prevents an explosion outside of the gun in event of a hang fire.
If the barrel is hot, the round must be extracted within the next 5 seconds to prevent a cook off. When more than 150 rounds have been fired in a 2-minute period, the barrel is hot enough to produce a cook off.
If the barrel is hot and the round cannot be extracted within the 10 seconds, it must remain locked in the chamber for at least 5 minutes, to guard against a cook off.
Keep the gun cover closed during the waiting periods.