This rocket is actually 78 mm in diameter. Two features distinguish it from other German rockets: the use of tail fins to secure stability in flight without rotation, and the employment of a novel fuze arming device.
The complete round weighs 15.19 pounds and is nearly 28 inches long. Its two principal components are the nose fuzed high explosive war head and the rocket motor tube. The shell is attached by means of an adaptor ring and the motor tube is closed by a cone-shaped assembly carrying the fins and containing the venturi and propellant supporting grid. Six tubular sticks of cordite form the propellant ignited by a circular gun powder igniter set off by a wire ignition bridge. The launcher used is the Mantelrohr.
The nose fuze consists of a steel nose piece housing a light alloy striker held by a light spring, a percussion detonator, a magazine containing four pressed pellets, and a thermal arming device. When the rocket is fired, the heat of the propellant gases melts a ring of fusable metal, permitting the detonator and magazine to approach the striker. The main filling of the high explosive head is pressed flake TNT.
SPECIFICATIONS
| Weight of complete round | 15 lbs., 3 oz. | |
| Weight of motor unit with central adaptor | 10 lbs. | |
| Weight of high explosive head with central adaptor | 6 lbs., 5 oz. | |
| Weight of high explosive filling | 1 lb., 5 1/2 oz. | |
| Weight of fuze (approx.) | 4 oz. | |
| Weight of propellant sticks | 2 lbs., 3 oz. | |
| Length of rocket | 27.7 ins. | |
| Ground range (estimated) | 6,300 yds. |
German: p. 359 (May 1, 1945)