Exploring the mechanics of the US howitzer: loading and firing massive rounds

Fluctus
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1 Video View·Nov 11, 2026
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Self-propelled howitzers became a core component
of US Army firepower during World War II.
Early artillery pieces were towed into battle,
limiting their mobility and exposing crews to
enemy fire. To solve this,
the US began mounting howitzers on tracked chassis,
creating mobile, armored artillery capable
of keeping pace with advancing forces.
After the war, the U.S. modernized its fleet,
introducing the M-52 and later the M-109 series in the 1960s.
The M-109 remains the backbone of U.S. mechanized artillery.
Its one 55-millimeter gun
and rotating turret deliver firepower with precision.
While decades of upgrades have kept it relevant on modern battlefields,
today's M109 Paladin
comes with advanced suspension, digital navigation,
and automated systems ensuring American artillery
stays mobile,
accurate,
and lethal.
The M109A7 Paladin
is the U.S. Army's premier 155mm self-propelled howitzer.
Delivering powerful,
rapid artillery support with modern digital precision.
Equipped with an automated fire control system, it can fire
GPS-guided Excalibur rounds out to 40 km with pinpoint accuracy.
Its upgraded chassis and suspension increase mobility,
allowing it to keep pace with armored units across rugged terrain.
The Paladin can unleash 4 rounds per minute in Burst Mode
and is protected by improved
armor against small arms,
shrapnel, and IED threats.
With advanced navigation, secure communications,
and faster shoot and scoot capability, it
remains a key asset
in modern mechanized warfare.
Loading and firing the M109A7 Paladin
is a coordinated process combining automation and crew skill
Your driver rev up the gun,
the number one man will pick up the round, put it on the
tray, it goes into the tube,
the number one man will ram it with a hydraulic rammer.
The gunner then will grab propellant,
go in the tube behind the round, and then will close
the breach.
Chief will then lay the gun, tell the number one man to prime.
Once they're primed, I'll tell him to hook up, he hooks up,
one last verification,
and he tells his number one man to stand by and fire.
After firing,
the vehicle rapidly displaces
to avoid counter battery fire.
Modernization has
kept the U.S. military at the forefront of technology
and lethality on the battlefield.
The U.S. Army's Armored Multipurpose Vehicle, or AMPV,
is designed to deliver modern battlefield mobility, protection,
and versatility for frontline troops, especially against roadside bombs
and underbody blasts, which were common threats in recent conflicts.
This increased survivability means soldiers can confidently maneuver
in dangerous areas with a higher degree of safety.
AMPV's design resembles a Bradley without its turret,
emphasizing its support rather than direct combat role.
It allows it to serve multiple roles,
from mortar carrier to mission command to medical treatment vehicle.
The biggest thing in this highlight
is this vehicle comes with five variants.
You have your Mission Command, your Motor Vehicle,
the General Purpose, and two types of medical
vehicles, your Medical Treatment and your Medical Evac Vehicle.
That's one of the advancements.
Also the armor protection, the speed,
and the survivability system, the upgrade and
enhancement of the survivability for our soldiers today.
The AMPV must operate alongside the M1 Abrams main battle tank
and the M2 Bradley infantry
fighting vehicle in the ABCT.
This vehicle shows an increased speed and mobility,
essential for maintaining pace with the M1 Abrams
and M2 Bradley in fast-moving combat scenarios.
Live-fire exercises are frequently conducted
to test how well the AMPV can support Abrams
in tight formations without slowing maneuvers
or impeding the overall pace of the ABCT,
as well as testing other strategies
with other vehicles and technologies.
This is the case of the 2024 Maneuver Warfighter
Conference and its HOT-X live-fire demonstration,
centered on maneuver warfare and innovations in armored combat.
Here, military leaders
and allied partners can assess how well these vehicles move across
complex terrain while responding to simulated enemy fire
and explosive threats.
There have been new introductions
in recent months, such as the AMPV CUAS,
which can accurately
detect, track, identify,
and defeat or disable stationary and moving aerial and ground targets.
This constant development of new technologies implemented
in military vehicles has been a
trend that is reflected in the appearance
of renewal programs such as the next generation
combat vehicle intended to implement a variety
of armored vehicles to add new capabilities to
army units and replace existing platforms
that are nearing the end of their useful life.
Given the emergence of sophisticated enemy systems,
including advanced ammunition, anti-tank missiles,
and cyber-electromagnetic warfare,
the initiative drives the rapid innovation for Army vehicles.
These advances are developed in specialized
centers such as the U.S. Army Combat Capabilities
Development Command Ground Vehicle Systems Center,
located at Detroit Arsenal in Michigan.
GVSC's mission spans the entire spectrum of vehicle development,
from research and initial design to engineering, prototyping,
testing, and integration, ensuring ground systems remain
at the forefront of technological capabilities.
Its mission aligns with the Army's modernization efforts
and initiatives such as the NGCV team, which focuses
on the rapid development and fielding of advanced combat platforms.
From these developments by the NGCV, interesting designs and prototypes
have been explored that seek to revolutionize combat methods.
One of these includes robotic combat vehicles to offload
the most dangerous missions from human soldiers to these autonomous
or remotely operated platforms.
Currently, the initiative has produced three variants,
including light, medium, and heavy,
that can engage specific mission roles,
like reconnaissance or direct combat.
RCVs can integrate weapon systems,
such as anti-tank guided missiles or medium-caliber
guns, and even deploy other payloads like electronic warfare systems
or counter-unmanned
aerial systems technologies.
These systems have been tested in several conditions,
and the military forces are familiarized
with them during events like
the RCV Soldier Operational Experiment 2.
These experiments provide the essential information
to integrate RCV into combat formations, refine
tactics, and gather direct feedback from soldiers.
Another development that is part of the NGCV portfolio
of initiatives is the Mobile Protected
Firepower Vehicle.
A light tank designed to provide infantry brigade combat teams
with a powerful mobile direct fire tool.
This is based on the multiple fire support vehicles
that have served the military forces,
such as the M1128 mobile gun system with its capacity
to support dismounted infantry and engage
the enemy in close combat. This vehicle is part
of the Stryker armored fighting vehicle family.
It features a 105mm tank gun and a Caterpillar C7 turbodiesel,
enabling the vehicle to keep pace
with a Stryker brigade combat team
and clear opposition quickly to permit rapid movement.
Thanks to vehicles of this style,
companies such as General Dynamics Land Systems
were inspired to design the M10 Booker,
an armored vehicle developed from the GDLS Griffin II
as the winner of its MPF program.
The development and introduction helped replace
the retired M551 Sheridan, a vehicle highly
valued for its airdrop capability
and support in airborne and light operations.
The M10 Booker is armed with a 105mm cannon based
on the M35 gun capable of firing two
primary munitions.
In addition to its main gun,
the M10 Booker includes a coaxial machine gun and a heavy
All of this is protected with modular armor panels
for additional protection and underbody
armor shields
the crew
from improvised
explosive devices.
In addition to the M10,
General Dynamics has invested in developing advanced platforms
that take advantage of current technological advances
to improve the effectiveness of ground
forces.
A clear example is the Stryker X and Abrams X vehicles,
which implement hybrid powertrains
for mobility.
The Striker X is built
on the Striker Infantry Carrier Vehicle platform, with an integrated
series hybrid electric power system that provides
an extended range for long-distance maneuvers
with silent watch
and silent movement capabilities for covert operations.
On the other hand, the Abrams X is an evolution
of the Abrams main battle tank with modifications
Similar to those applied to the Stryker.
However, this vehicle uses a parallel hybrid electric power system
that combines the transmission
of the advanced combat engine
by Cummins and Sapa.
The evolution of the military industry,
as seen with the development of these new armored
vehicles, has demonstrated the change occurring
with current combat methods and opened a window
to the countless possibilities
that this technological innovation will cause for the military forces.
That's the end of this video. I hope you enjoyed it.
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