The Story Behind the Kampfpanzer 70 (MBT-70) Design

Origins and Ambitions of the Kampfpanzer 70

Nicholas Moran, a veteran armor officer, outlines the origins of the Kampfpanzer 70, designated as the MBT-70 in the United States. The tank was a joint development project initiated in the early 1960s between the United States and West Germany. The ambition behind the initiative was to create a next-generation main battle tank (MBT) capable of addressing the shared security challenges faced by NATO allies. By developing a shared platform, the two nations aimed to streamline logistics, reduce development costs, and simplify the production of spare parts and maintenance processes.

Moran emphasizes that despite the promising idea, the project struggled under the weight of international collaboration. Differing national priorities, engineering practices, and even language barriers posed significant challenges. In the end, the joint venture split, with the United States pursuing the development of the M1 Abrams and Germany focusing on the creation of the Leopard 2. Some prototypes of the MBT-70, also called the Kampfpanzer 70 (KPz 70) in Germany, still exist. Moran notes that the Deutsches Panzermuseum in Munster houses a well-preserved example of this ambitious, albeit ultimately unsuccessful, tank.

The MBT-70 was essentially a collaborative effort to synthesize American and German tank design philosophies. The result was a platform that aimed to combine revolutionary features, incorporating advanced technology for improved battlefield capabilities. Despite its ultimate failure, this project paved the way for other iconic tanks developed by the United States and Germany in the decades that followed.

Innovative Design Features

A defining aspect of the Kampfpanzer 70's development was its innovative and ambitious design, which sought to integrate groundbreaking features from both American and German engineering minds. According to Moran, one of the key design decisions was the placement of all crew members: driver, gunner, and commander, within the turret. This approach aimed to provide a single protected crew capsule, offering enhanced survivability through improved physical and radiological shielding in a potential nuclear battlefield scenario. The adoption of this unconventional configuration pushed design boundaries but also introduced several functional challenges.

One noteworthy innovation discussed by Moran is the tank's hydropneumatic suspension system, which allowed for variable ride height and pitch adjustments. The system was segmented into four independent groups, each controlling three road-wheel stations on either side of the tank. By adjusting pressure within the system, the tank could optimize its mobility across different terrains or lower its silhouette to improve survivability. This advanced feature necessitated an automatic tensioning system for the tracks to prevent them from detaching during maneuvers, a sophisticated mechanism that was unusual at the time.

The MBT-70 also featured German-manufactured Diehl rubber track blocks, which were mounted differently than their American counterparts. These tracks lacked grease points, and adjustments could be made from inside the vehicle. Moran notes that several other German design influences were evident on the tank, from the layout of the headlights to the aesthetic of the tail lights.

Efforts to integrate unique weaponry further exemplified the platform's innovative yet challenging design. For instance, the Americans pushed to include a 152 mm Shillelagh missile launcher, designed to fire both conventional rounds and guided anti-tank missiles. Although the turret's ballistic performance was effective in protecting the crew from direct hits, the turret capsule’s size constraints necessitated an automatic loading system. Moran observes that this choice eliminated the role of a fourth crew member, traditionally the loader, which introduced dependence on unproven technology.

Technical Challenges and Limitations

Despite its ambitious design, the MBT-70 faced numerous technical challenges that ultimately contributed to its downfall. Moran identifies the decision to house all crew members within the turret as a significant issue. While the unified crew capsule had theoretical advantages in terms of protection, it also resulted in space limitations and operational inefficiencies. The inclusion of an automatic loader added a layer of mechanical complexity and risk, as the elimination of the manual loader left no redundancy if the system failed.

Moran also highlights the intricacies of the hydropneumatic suspension system, which, while groundbreaking, introduced maintenance and reliability concerns. The need for automatic track tensioning to accommodate changing suspension settings was a novel solution at the time, but it further complicated an already intricate design.

Another bottleneck was the diverging national requirements for the tank. While the Americans prioritized firepower, pushing for the inclusion of the Shillelagh missile launcher, the Germans focused on the survivability of the crew. These conflicting priorities made it difficult to agree on a unified design. Even something as basic as language barriers and differing engineering traditions created difficulties when the teams finally began working together in 1966, after developing independently for three years in their respective countries.

Moran points out that these technical complications, combined with escalating costs, eroded confidence in the feasibility of the program. The MBT-70's reliance on unproven and experimental technologies added unnecessary risks and costs, which ultimately outweighed the potential operational benefits. These challenges, alongside disputes over design philosophies and strategic needs, ensured the program's ultimate cancellation.

What was said, and when

The points this article makes, and the moment in the recording where each was said. Everything below was said by Nicholas Moran. Every time opens the recording at that moment.

• The Kampfpanzer 70 was designated as the MBT-70 in the United States. 01:03.
• The Kampfpanzer 70 project was a joint initiative between the United States and West Germany that began in the early 1960s. 00:00.
• It aimed to create a next-generation main battle tank (MBT) for NATO allies to address shared security challenges. 00:00.
• The project sought to streamline logistics, reduce development costs, and simplify spare parts and maintenance processes. 00:00.
• The United States ultimately pursued the development of the M1 Abrams while Germany focused on the Leopard 2. 00:45.
• Prototypes of the MBT-70, also called Kampfpanzer 70, still exist. 01:03.
• A well-preserved example of the Kampfpanzer 70 is housed at the Deutsches Panzermuseum in Munster. 01:03.
• The Kampfpanzer 70's turret housed all crew members to enhance survivability, including shielding against nuclear threats. 02:27.
• The tank featured a hydropneumatic suspension system that allowed variable ride height and pitch adjustments. 07:22.
• The suspension system consisted of four groups controlling three road-wheel stations on each side. 07:22.
• The tank's tracks included an automatic tensioning system unique at the time to prevent their detachment during maneuvers. 08:06.
• The MBT-70 utilized German-manufactured Diehl rubber track blocks with an adjustable system inside the vehicle. 06:26.
• The Americans integrated a 152 mm Shillelagh missile launcher capable of firing both conventional ammunition and guided missiles. 01:44.
• The turret capsule's size led to the necessity of an automatic loader, removing the role of the manual loader. 03:01.
• The unified crew capsule introduced space limitations and operational inefficiencies. 03:01.
• Automatic track tensioning for the suspension added further complexity to the tank's design. 08:06.
• The Americans prioritized armament while the Germans focused on crew survivability, leading to diverging requirements. 01:44.
• Language barriers and differing engineering traditions were challenges for the US and German teams. 04:51.
• The collaborative effort failed but paved the way for future success of the M1 Abrams and Leopard 2 tanks. 00:45.