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Re: Reversing clam shell rudder

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  • Frank McNeill
    How about durability? Toy boats with no moving parts to replace or repair could regain the pop-popularity they had before WW2 when I was a kid with a few
    Message 1 of 18 , Jun 23, 2011
      How about durability? Toy boats with no moving parts to replace or repair could regain the pop-popularity they had before WW2 when I was a kid with a few updated features that would make it possible for kids to control them with their cell phones. My daughter is a teacher, so I asked her how many of her kids have cell phones. Her answer was that all of them do-

      --- In pop-pop-steamboats@yahoogroups.com, Jean-Yves Renaud <boite.de.j-y@...> wrote:
      > Donald,
      > I accept and share all your comments...but I don't wish to go in that
      > direction. The pop-pop boats are so simple and so cheap (20 cents in
      > India without bargaining). Why would you like to develop a electrically
      > heated and remote controlled pop-pop boat. Due to the pop-pop principle
      > the efficiency will be pathetic as on every pop-pop engine. It is easier
      > to use electric propulsion by classic propeller or waterjet with a quite
      > better efficiency; which means for the same battery a faster speed,
      > better maneuvrability and a quite quite longer autonomy.
      > Le 22/06/2011 22:53, Donald Qualls a écrit :
      > >
      > > Jean-Yves Renaud wrote:
      > > >
      > > > Note: After five years the battery of my PC is dead. As both battery
      > > > packs of my few year old screw driver are dead, the other day I
      > > > recharged the battery of my first screw driver (approx 30 years old) and
      > > > to my surprise it worked. Heavy and not powerful, but still
      > > > working...with lead battery. Just for info. I cannot judge on so few
      > > > examples.
      > > >
      > >
      > > The lithium primary (non-rechargeable) cells used for CMOS backup in
      > > many computers have a useful life of about five years, same as a lithium
      > > watch battery. A lithium rechargeable (aka lithium-ion or lithium
      > > polymer) has a useful life of 2000 to 5000 charge cycles, apparently
      > > within up to around ten years, if it's prevented from discharging too
      > > deeply and isn't overcharged. I'm amazed your old lead-acid gel cells
      > > were still good; normally, they're history if they sit fully discharged
      > > for as little as a couple months (though they can last up to around ten
      > > years if kept on a maintenance charge, as with emergency lighting in
      > > warehouses and such). I've seen thirty year old nickel-cadmium cells
      > > accept a charge and run the device they were in, but their capacity is
      > > greatly reduced after such a long rest -- yet they handle that better
      > > than any other battery type I know.
      > >
      > > All the electronics for a lithium pop-pop boat could be integrated --
      > > yes, it's more complex, but in the same way that an Airhogs R/C airplane
      > > is more complex than the Sleek Streek model airplanes I used to fly when
      > > I was a kid. More complex, more expensive -- but more interesting to
      > > modern kids attuned to video games and action movies; plug the boat into
      > > the controller (to charge the on-board battery) until the light turns
      > > green, use the dropper (it's on a lanyard, so as not to get lost) to
      > > fill the motor, plop it in the pond or pool, and wait a minute or two to
      > > raise steam (that wait will be the hard part -- it might be avoidable,
      > > or at least greatly reduced, if you're willing to give up the loud
      > > "clack" of a diaphragm), and drive around the pond until the "low
      > > battery" warning comes on, giving time to motor back to the shore where
      > > you can reach the boat to pull it out of the water. Complex under the
      > > hood, but so very simple to use -- that's the way of modern toys, isn't
      > > it? The onboard electronics would handle temperature control as a
      > > trivial addition to the basics of managing the lithium battery and
      > > rudder, so there'd be no need to worry about overheating the heavily
      > > insulated motor. The thing ought to sell for between $30 and $50, if
      > > you can mass produce enough of them. That's the same range as the
      > > cheapest indoor R/C fliers...
      > >
      > > --
      > > If, through hard work and perseverance, you finally get what you want,
      > > it's probably a sign you weren't dreaming big enough.
      > >
      > > Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com
      > >
      > > Opinions expressed are my own -- take them for what they're worth
      > > and don't expect them to be perfect.
      > >
      > >
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