Download Download Hi-Res version
903 x 478

MK 66 rocket motors

MK 66 rocket motors Hydra 70 is the name associated with the family of 2.75-inch (70 millimeter) rockets. Hydra 70 refers to the Mark 66 rocket motor with any warhead/fuze combination. The MK 66 rocket motor was designed to provide a common 2.75-inch rocket for helicopters and high-performance aircraft. Compared to the MK 40 motor, it has a longer tube, an improved double base solid propellant, and a different nozzle and fin assembly. Increased velocity and spin provide improved trajectory stability for better accuracy. The launch signature and smoke trail have been significantly reduced. The MK 66 Mod 1 is not hazards of electromagnetic radiation to ordnance safe. It can be inadvertently ignited by electromagnetic radiation, especially by radio frequencies found aboard Navy ships. Both the Mod 2 and Mod 3 have HERO filters, and the Mod 2 filter may prevent the AH-1 rocket management system from inventorying. The Mod 1 is the standard motor for Army use as will be the Mod 3 when it is fielded.
Source: FM-140: Field Manual: Helicopter Gunnery. United States Army (1996)
All of these images are completely free and may be used for any purpose, in whole or in part, royalty-free, without the need to give credit to their authors, under the laws of the United States. They come from old books whose copyright has expired in the U.S. (like the 1911 Encyclopedia Britannica) and from U.S. Government web sites.

No copyright. No rights reserved. All images and text are believed to be public domain under the laws of the United States. No warranty nor guarantee is given as to the accuracy of any of this information or imagery, nor for it's suitability for any purpose. Use at your own risk. For more information about copyrights, see our Terms of Use.

(Script last modified Saturday, the 7th of December, 2013 at 3:18pm)