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Gliding propulsion on winged sub...

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  • Gliding propulsion on winged sub...

    Hello. Out of curiosity, has this contraption ever been modeled ?

    A sub containing a hermetic bellows containing air, housed in a wet chamber.
    The bellows compresses/expands by a motor shaft screw (linear servo)...
    The model made neutrally buoyant at half-compressed bellows.

    The bellows placed slightly front,
    Any small reduction in air volume by compressing the bellows will make it sink with nose down.

    Fixed wings will make it glide to depth in forward advance motion at a mild angle.

    * When a preset depth sensor reaches a depth -say 30m-, motor energizes CCW a few seconds to expand the bellows.

    Sub heads nose up to surface at a mild angle also advancing forward.
    At surface, recharges its battery by solar panels on wings/body if needed.

    Or, a surface sensor starts the motor CW a few seconds to again compress air in bellows.
    Sub sinks nose down at a mild angle gliding forward.

    Go to *

    Adding a compass steered rudder, the navigation is kept straight as a preset heading.
    -Of course, no propeller needed-
    Motor controlled also by angle sensing in both ascent/descent modes to compensate for depth compressing the bellows, to maintain mild vertical angles.

    Let it loose and cross the ocean to the other continent. No radio control.

    Pardon my poor terminology.
    Last edited by Externet; 11-20-2017, 02:12 PM.

  • #2
    Your terminology is just fine.

    The up-down glide advance was tested in 'drone' size a few decades ago. Worked. But as far as I know not pursued for larger craft. No hobby model efforts with this form of propulsion I know of. But, as a side note, the technique was described in some detail in the fiction book, "cold is the sea", By Edward Beach.



    David
    Last edited by He Who Shall Not Be Named; 11-20-2017, 09:14 PM.
    "... well, that takes care of Jorgenson's theory!"

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