 Martlet 3E The Martlet 3E was a suborbital solid rocket designed to be fired from a smaller, 7-inch (180mm) cannon used in the HARP project.
<clarity>  Martlet 3E The Martlet 3E was a suborbital solid rocket designed to be fired from a smaller, 7-inch (180mm) cannon used in the HARP project.
 Martlet 3E The Martlet 3E was a solid suborbital rocket designed to be fired from a smaller, 7-inch (180mm) cannon used in the HARP project.