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 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.

A sweet and sparkling chapter book series about finding your place and believing in yourself! It’s Marnie Blue’s first day at Lady Sealia Foam’s Mermaid School, and she’s terrified. What if she can’t make friends? What if she has to ride a seahorse? And what if the teachers assume she’s just like her Aunt Christabel, a famous singer who was a troublemaker growing up. Even though Marnie is sweet and tries her best to fit in, a mermaid named Orla seems intent on getting her in trouble. But when Orla finds herself in danger, Marnie has to swim to the rescue! Filled with fabulous, fishy fun, Mermaid School is the start of a sparkly new chapter-book series that’s sure to enchant young readers.

Equations for estimating the motion, forces, and couples applicable to the design of clamshell systems utilizing a new roll-out ejection concept are presented. Both the deployment and the free flight phases of the clamshell ejection are considered. No attempt is made to answer the thermal, vibratory, and structural detail problems of these clamsheils.

Marnie competes against her friend Orla and Gilly, a new student at Lady Sealia Foam's Mermaid School, for the lead role of Queen Maretta in the annual Clamshell Show.