Sedena-Henschel HWK-11

Sedena-Henschel HWK-11
Type - Infantry fighting vehicle (Second Version) armoured personnel carrier (First and Third Version)
Place of origin -  Mexico
 West Germany
Service history
In service - 1965-present
Used by - Mexico
Production history
Designer - Henschel / SEDENA
Designed - 1962
Manufacturer - Henschel Wehrtechnik GmbH / SEDENA
No. built - 52+
Specifications
Mass - 11 tonnes
Length - 5.05 m
Width - 2.53 m
Height - 1.59 m (without turret)
Crew - 2+10
Armor - Welded steel armour from 5 mm - 15 mm
Main armament - 7.62 mm machine gun on French CALF turret
Engine - Before 1993, 6V-53 Detroit Diesel developing 210 hp (current engine and power unknown)
Transmission - Allison TX-100 automatic transmission
Suspension - Torsion bar
Fuel capacity - 356 Liters
Operational range - 400 km
Maximum speed - Before 1993, 70 km/h (current top-speed unknown)

The Sedena Henschel HWK-11 was a joint project between the Mexican Secretariat of National Defense (SEDENA) and Henschel Wehrtechnik GmbH of West Germany.
Development
The HWK-11 came about at the request from the Mexican defense secretary for a new tracked armored troop carrying vehicle for the Mexican army. The HWK was mainly German designed although Mexico had some input in the design process in the form that Mexico set certain requirements and specifications for the vehicle and Mexico also designed the basic configuration of the hull.
Production
In 1964 the first 12 vehicles were manufactured in West Germany and delivered to the Mexican Army while facilities were set up in Mexico to manufacture the vehicle locally. Initially 350 HWK-11s in multiple variants were to be manufactured for the Mexican military but the entire order was not completed. At least 40 vehicles were produced but the exact total number of vehicles produced has not been disclosed by the Mexican military.

Specifications

First Version - 1965
The first versions of the HWK-11 were strictly troop transport vehicles with only a single turret mounted 7.62 MG3 machine gun that could be fired from within the vehicle. This initial version featured a 180 hp engine and a two image intensifiers, one for the driver and one for the machine gun operator.
Second Version - 1980
In 1980 one vehicle was used to test the use of a one-man Helio FVT900 turret with a 20 mm cannon and a coaxial 7.62 mm machine gun. The upgrade also included the upgrading of the vehicles engine to the 6V-53 Detroit Diesel which produced 210 hp and allowed the vehicle to reach up to 70 km/h.
Third Version - 1993
In 1993 the vehicle was upgraded one more time, given a more powerful engine (the type of which is unknown) and new German made M113 caterpillar road wheels. The most significant upgrade to this new version is the addition of a French design fully enclosed turret mounting a 7.62 mm machine gun. Finish 1993.
Medium tank
A medium tank variant was produced in small quantities to be utilized as an infantry fire support vehicle. It features French designed turret mounting a 90 mm gun borrowed from the Panhard ERC90 and a night vision system. The engine type fielded has not been publicly disclosed.
Comparable Vehicles
German Schützenpanzer Marder
Soviet BMP-1
United States M113 armored personnel carrier
British FV432