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Radio controllable pop-pop engines and boats — of course!

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  • Frank McNeill
    Hi All, From the top down, the new image on the home page shows a cut-away view of a radio controllable pop-pop or gurgle-gurgle engine with two boilers and
    Message 1 of 1 , Aug 8, 2006
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      Hi All,

      From the top down, the new image on the home page
      shows a cut-away view of a radio controllable pop-pop
      or gurgle-gurgle engine with two boilers and two
      damper plates that could be pivoted to direct heat
      from a burner to either or both of the boilers. The
      damper plates would be attached to shafts extending
      through the far side of the engine's housing. The
      shafts would be equipped with bell cranks linked
      together by a connecting rod to make them move in
      unison under the control of a radio control receiver
      with a servo control mechanism.
      The boilers would probably be the square tube type
      boiler Richard Jenkins used in his "Popflea, or the
      folded and twisted tube type used in Phantom Boats
      shown and described in the Pop-pop Pages, because
      these types are more compact than diaphragm boilers,
      and perhaps more efficient as well. The propulsion
      tubes of an engine with two boilers could be located
      to provide steering to points ranging from dead ahead
      to full port or starboard, or for forward and reverse
      propulsion without any steering function.
      An engine with four boilers could be controlled by a
      two channel R/C system with two servos, one for the
      side shown, and one for a similar side that would
      block the view of the side that is shown. For models
      that don't have paddle wheels, the tubes of a boiler
      would extend through the hull below the water-line at
      the port or starboard side of the stern or the bow.
      There are four locations of this kind, so an engine
      with four boilers could provide different degrees of
      propulsion at four locations that would be controlled
      by moving the two sticks of a two-channel radio
      control transmitter. For models that do have paddle
      wheels, the wheels could either be tendency driven by
      moving through the water, or by tubes that would
      direct water against their paddles to make it look
      like they were being driven by engines. Anybody who
      has built a rubber band powered paddle wheel boat will
      remember that small paddle wheels don't work very
      well. They splash a lot of water, look more like
      beetles trying to get out of toilet bowls, and unwind
      before the little boat has moved more than a few
      I realize that any member who still reads these posts
      probably does not visit the home page, so go to:
      http://tinyurl.com/mfuh9 to see what's on the home
      page— or to: http://tinyurl.com/lsshv see what we have
      in files— or to: http://tinyurl.com/qpxvb to see what
      we have in photos— or to : http://tinyurl.com/mm2kr
      for a lot of links— or to: http://tinyurl.com/hh85e as
      an alternative to all of the above.

      Best wishes, old Frank

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