2.25-Inch SCAR
The 2.25-Inch SCAR (Sub-Caliber Aircraft Rocket) was a family of air-to-ground training rockets used for air-to-ground rocket firing practice by fighter-bomber pilots in the 2nd World War. The SCAR was developed by the National Defense Research Committee (NDRC) and the U.S. Navy's Bureau of Ordnance.
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| Photo: Phil Callihan |
| 2.25-Inch SCAR |
The rockets were similar to the 3.5-Inch and 5-Inch FFARs (Forward Firing Aircraft Rockets), but used a solid-propellant rocket motor of only 2.25-inch diameter (hence the "sub-caliber" name). By varying the amount of propellant, the flight characteristics of different FFAR types could be approximated. The following table lists the 2.25" Rocket MARK/MOD designations for complete SCAR rounds. All rocket heads were inert.
| Designation | Type | 2.25" Motor | 2.25" Head |
|---|---|---|---|
| MK 1 MOD 0 | Practice | MK 10 MOD 0/1 MK 11 MOD 0/1 | MK 1 MOD 0 MK 3 MOD 2/3 |
| MK 2 MOD 0 | Practice | MK 10 MOD 0/1 MK 10 MOD 0/1 | MK 2 MOD 0 MK 4 MOD 0 |
| MK 2 MOD 1 | Practice | MK 12 MOD 0 MK 13 MOD 0/1 | MK 1 MOD 0 MK 3 MOD 2/3 |
| MK 3 MOD 0 | Dummy | MK 11 (inert) | MK 3 |
| MK 4 MOD 0 | Practice | MK 15 MOD 0/2 | MK 3 MOD 0/2/3 |
| MK 5 MOD 0 | Dummy | MK 15 MOD 0/2 (inert) | MK 3 MOD 0/2/3 |
| MK 6 MOD 0 | Practice | MK 16 MOD 4/5/6 | MK 3 MOD 0/2/3 |
The MK 1 was used for 3.5-Inch FFAR practice, the MK 2 for 5-Inch FFAR practice, and the MK 3 through MK 6 for 5-Inch HVAR practice.
Specifications
Note: Data given by several sources show slight variations. Figures given below may therefore be inaccurate!
Data for 2.25-Inch SCAR:
| Length | ? |
| Diameter | 5.7 cm (2.25 in) |
| Weight | 36 kg (80 lb) |
| Propulsion | Solid-fueled rocket |
Main Sources
[1] Norman J. Bowman: "The Handbook of Rockets and Guided Missiles", Perastadion Press, 1963
[2] Frederick I. Ordway III, Ronald C. Wakeford: "International Missile and Spacecraft Guide", McGraw-Hill, 1960
[3] Department of the Navy: "OP 1415: Rocket Assemblies, Complete Rounds and Components Data", 11 May 1955
Back to Directory of U.S. Military Rockets and Missiles, Appendix 4
Last Updated: 10 December 2025