Debut: February 2017

 




   

.: Pat McCumiskey's U.S. Marines LVTP7

Brand:

Academy

Scale:

1/35

Modelling Time:

~ hrs

PE/Resin Detail:

none

Comments:

"Legend & various stowage"

Assault Amphibious Vehicle

From Wikipedia, the free encyclopedia
AAVP7A1 RAM/RS
USMarines AAV Iraq apr 2004 116 hires.jpg
US Marine Corps AAV in Fallujah, Iraq
Type Armoured personnel carrier
Place of origin United States
Service history
In service 1972–present
Used by See Operators
Wars Falklands WarPersian Gulf WarSomali Civil WarIraq War
Production history
Designer FMC Corporation
Manufacturer United Defense
Produced 1972
Specifications
Weight 29.1 tons
Length 7.94 m (321.3")
Width 3.27 m (128.72")
Height 3.26 m (130.5")
Crew 3+21

Armor 45 mm
Main
armament
Mk 19 40 mm automatic grenade launcher (rounds: 96 ready; 768 stowed)
Secondary
armament
M2HB .50-caliber (12.7 mm) machine gun (rounds: 200 ready; 1,000 stowed)
Engine Detroit Diesel 8V-53T (P-7), Cummins VTA-525 /903 cubic inches(P-7A1)
400 hp (300 kW)
VTAC 525 903 525 hp(AAV-7RAM-RS)
Power/weight 18 hp/tonne
Suspension torsion-bar-in-tube (AAV-7A1); torsion bar (AAV-7RAM-RS)
Operational
range
480 km (300 miles); 20 NM in water, including survival in Sea State 5
Speed 24–32 km/h (15–20 mph) off-road, 72 km/h (45 mph) surfaced road, 13.2 km/h (8.2 mph) water[1]

The Assault Amphibious Vehicle[2] (AAV)—official designation AAV-P7/A1 (formerly known as Landing Vehicle, Tracked, Personnel-7 abbr. LVTP-7)—is a fully tracked amphibious landing vehicle manufactured by U.S. Combat Systems (previously by United Defense, a former division of FMC Corporation) and FNSS Defence Systems.[3][4]

The AAV-P7/A1 is the current amphibious troop transport of the United States Marine Corps. It is used by U.S. Marine Corps Assault Amphibian Battalions to land the surface assault elements of the landing force and their equipment in a single lift from assault shipping during amphibious operations to inland objectives and to conduct mechanized operations and related combat support in subsequent mechanized operations ashore. It is also operated by other forces. Marines call them "amtracks," a shortening of their original designation, "amphibious tractor."

Development

Two U.S. Marine Corps Assault Amphibious Vehicles emerge from the surf onto the sand of Freshwater Beach, Australia
U.S. Marines exit from an Assault Amphibious Vehicle during a live fire exercise in Djibouti, Africa, in 2010

The LVTP-7 was first introduced in 1972 as a replacement for the LVTP-5. In 1982, FMC was contracted to conduct the LVTP-7 Service Life Extension Program, which converted the LVT-7 vehicles to the improved AAV-7A1 vehicle by adding an improved engine, transmission, and weapons system and improving the overall maintainability of the vehicle. The Cummins VT400 diesel engine replaced the GM 8V53T, and this was driven through FMC's HS-400-3A1 transmission. The hydraulic traverse and elevation of the weapon station was replaced by electric motors, which eliminated the danger from hydraulic fluid fires. The suspension and shock absorbers were strengthened as well. The fuel tank was made safer, and a fuel-burning smoke generator system was added. Eight smoke grenade launchers were also placed around the armament station. The headlight clusters were housed in a square recess instead of the earlier round type. The driver was provided with an improved instrument panel and a night vision device, and a new ventilation system was installed. These upgraded vehicles were originally called LVT-7A1, but the Marine Corps renamed the LVTP-7A1 to AAV-7A1 in 1984.

Another improvement was added starting in 1987 in the form of a Cadillac Gage weapon station or Up-Gunned Weapon Station (UGWS) which was armed with both a .50 cal (12.7 mm) M2HB machine gun and a Mk-19 40 mm grenade launcher.

Enhanced Applique Armor Kits (EAAK) were developed for the AAV-7A1 in 1989 and fitted by 1993, and the added weight of the new armor necessitated the addition of a bow plane kit when operating afloat.

The Assault Amphibian Vehicle Reliability, Availability, Maintainability/Rebuild to Standard (AAV RAM/RS) Program has provided for a replacement of both the engine and suspension with US Army M2 Bradley Fighting Vehicle (BFV) components modified for the AAV. The ground clearance has returned to 16 inches (40.6 cm) and the horsepower to ton ratio has changed from 13 to 1 back to 17 to 1. The AAV RAM/RS rebuild encompassed all AAV systems and components in order to return the AAV back to the original vehicle's performance specifications and ensure acceptable Fleet Marine Force (FMF) AAV readiness ratings until the EFV is operational. Introduction of the BFV components and the rebuild to standard effort is expected to reduce maintenance costs for the remaining life of the AAV through the year 2013. Though due to the cancellation of the EFV the AAV will remain in service much longer.

Limited reset

In July 2013, the Marine Corps began seeking industry assistance for a "limited reset" of the service's AAVs to enhance reliability. The limited reset was planned to begin in 2016, with roughly 40 percent of the 1,064-vehicle fleet to go through a survivability upgrade. The AAV's service life is to end in 2030.[5] The Marines released a request for proposals for the AAV Survivability Upgrade Program on 29 October 2013. 396 AAVs are planned to go through the survivability upgrade, with numbers varying each year ranging from 22 to 96 vehicles. Survivability upgrades will be applied to a fraction of the fleet to improve force protection until the fielding of the Amphibious Combat Vehicle.[6] SAIC was awarded the contract to perform AAV upgrades in March 2015.[7] The Naval Research Laboratory is experimenting with a specific type of rubber called polyurea that stretches with the armor without cracking, which can better absorb the kinetic energy of bullets and blast fragments.[8]

On 28 January 2016, Marine and SAIC officials unveiled the AAV survivability upgrade (SU). Survivability enhancements include replacing the angled Enhanced Applique Armor Kit with 49 buoyant, flat-sided ceramic panels (adding 10,000 lb (4,500 kg) of weight), a 2.25 in (5.7 cm)-thick aluminum armor underbelly providing MRAP-equivalent blast protection, a bonded spall liner, armor-protected external fuel tanks, and 18 blast mitigating seats in an alternating high and low pattern with elevated foot stands. To handle the extra weight and increase land speed, it has a VT903 engine that boosts power from 525 hp to 675 hp, as well as a new power take-off unit and transmission. Shocks have been replaced by a new suspension system that uses rotary dampers and upgraded torsion bars, which raises the hull by 3 inches (7.6 cm) and gives a smoother ride. The troop compartment of provisions for the crew and embarked Marines is also revamped, increasing supplies to operate from one day to three. Speed on water is expected to increase due to new axial flow water jets, and reserve buoyancy is increased from 18 to 22 percent. The upgrade costs $1.65 million per vehicle, and will be applied to enough AAV personnel variants to lift four infantry battalions. Testing will be conducted throughout 2016, with low-rate initial production expected in 2017, initial operational capability in 2019, and full operational capability in 2023.[9][10][11]

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