The Clamshell Show
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The Clamshell Show (Mermaid School #2)
A sweet and sparkling chapter book series about finding your place and believing in yourself! Marnie Blue’s adventures continue at Lady Sealia Foam’s Mermaid School. Now that she’s saved the day and made some new friends, she’s ready to conquer the next challenge and continue to learn more about her underwater world.
The Clamshell Show
Marnie Blue's adventures continue at Lady Sealia Foam's Mermaid School. Now that she's saved the day and made some new friends, she's ready to conquer the next challenge and continue to learn more about her underwater world.
Investigation of a Clamshell Roll-out Ejection Concept
The equations for the motion, forces, and couples generated by clamshells released from spinning sounding rockets in accordance with a roll-out ejection concept are presented. The application of these equations to a study of a system for the Javelin (i.e., Honest John-Nike-Nike-X248) rocket vehicle is discussed. The roll-out ejection concept advocated requires that each deploying clamshell be pivoted about an axis at its trailing edge located in the system sectioning plane. Clamshell despinning is a consequence of this deployment since the pivotal, i.e., roll-out, rate is in opposition to the rocket vehicle spin. The energy required by the deployment is derived largely from the rotational energy of the clamshell. Thus, the rocket vehicle will not be significantly despun by this kind of clamshell deployment. This ejection concept also permits a system design which makes it possible to limit clamshell angular motion to rotation about that one of its centroidal principal axes which is brought into parallelism with the rocket vehicle longitudinal axis. Also, by equalizing the moments of inertia about the other centroidal principal axes, the rollout motion can be decoupled from any extraneous angular motion about these axes.