Bring an essential piece of early U.S. air-to-ground rocket history into your collection with this inert restored 2.75" / 70mm Mark 4 Mod 10 Folding-Fin Aerial Rocket (FFAR) motor. Restored from an original U.S. military rocket motor body, this piece has been preserved for display, retaining the motor, nozzle section, and tail-fin arrangement that made the 2.75-inch FFAR one of the most recognizable aircraft rockets of the Cold War era.
The Mark 4 Mod 10 motor represents the earlier generation of 2.75-inch FFAR propulsion, the direct predecessor to the later Mark 40 series and, eventually, the Hydra 70 Mark 66 family. For collectors, restorers, and museums, it is the correct foundation for early “Mighty Mouse” and Vietnam-era 2.75-inch rocket displays.
The Mark 4 FFAR Rocket Motor
The U.S. 2.75-inch Folding-Fin Aerial Rocket family was developed in the late 1940s and 1950s as a compact, high-volume rocket system for fighter aircraft. Over time, the 2.75-inch rocket evolved from an air-to-air “Mighty Mouse” weapon into a highly flexible air-to-ground system used with HE, HEAT, smoke, flechette, illumination, and practice warheads. By around 1960, the Mark 4 rocket motor had become the standard motor family for 2.75-inch rocket heads, before being superseded by the Mark 40 universal motor.
Historically, the Mark 4 motor was used with early 2.75-inch warheads such as the Mark 5 HEAT head and other first-generation FFAR loads. Its folding-fin tail assembly gave the rocket compact dimensions inside launchers and then deployed in flight for stabilization after launch. This made the 2.75-inch FFAR practical in multi-tube pods and launcher packs on fixed-wing aircraft and, later, armed helicopters.
Historical Role in U.S. Aviation Ordnance
The Mark 4 motor belongs to the first major generation of 2.75-inch aircraft rockets that armed U.S. Navy, Marine Corps, and Air Force aircraft during the Cold War. These rockets were carried in launchers and pods that allowed aircraft to deliver large salvos against aircraft, vehicles, field fortifications, and area targets. As U.S. doctrine shifted toward close air support and helicopter gunship operations, the 2.75-inch FFAR family remained important, but the motor design eventually evolved into the Mark 40 series for low-speed rotary-wing and other aircraft applications.
That history makes the Mark 4 Mod 10 especially desirable because it represents the earlier, classic FFAR stage of development before the later low-spin Mark 40 and wrap-around-fin Mark 66 Hydra motors took over. In a collection, it bridges the gap between the original “Mighty Mouse” era and the modern Hydra 70 system.
About This Restored Mark 4 Mod 10 Rocket Motor
Authentic U.S. Military Rocket Motor Body
- Restored from a genuine 2.75" / 70mm Mark 4 Mod 10 rocket motor body.
- An excellent companion for early HEAT, HE, smoke, or practice warhead displays where a correct Mark 4-series motor is required.
Classic Folding-Fin FFAR Configuration
- Retains the defining folding-fin aircraft rocket profile that gave the FFAR family its name.
- Correct visual style for early 2.75-inch aircraft rocket displays, launcher pods, and pylon loadouts.
- Ideal for collectors building out displays focused on early FFAR / “Mighty Mouse” development.
Professionally Demilitarized and Restored
- Motor body is completely inert.
- No propellant grain, igniter, or live energetic components remain.
- Refinished for long-term display
Completely Inert Assembly
This restored Mark 4 Mod 10 motor is sold strictly as an inert display and educational component.
- No propellant
- No igniter
- No live rocket motor components
- Not functional and not intended for firing use
It is suitable for private collections, museum exhibits, classroom demonstrations, and aircraft weapons displays.
Historical Reference
Open technical references clearly document the Mark 4 as the early standard 2.75-inch FFAR motor family, with multiple Mods in service before the Mark 40 replaced it as the universal motor for later low-speed aircraft applications. Public sources I checked did not surface a clean, authoritative standalone NSN/NIIN listing specifically for Mark 4 Mod 10 motor only, so I would avoid stating one unless you have it from original paperwork or markings on the motor itself. That is more accurate than attaching a questionable stock number to the listing.
Ideal For
- Early 2.75-inch FFAR / “Mighty Mouse” aircraft rocket displays
- Vietnam and Cold War aviation ordnance collections
- Museum exhibits tracing the evolution from Mark 4 FFAR motors to Mark 40 and later Hydra 70 motors.
- Completing restored 2.75-inch rockets with historically correct early motor assemblies
Approx length 39", Approx width 2.75", Approx height 2.75", Approx weight 7lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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