fun new engine

Well unless you want to use sea water, the steam system is a net loss
requring some continious amount of "makeup" water. The vessel will be
required to carry both fuel and water. Or, as I said, boil sea water I
suppose.

"Ed Edelenbos" <eded.TakeThisOut@speakeasy.net> wrote in message
news:3F20605F.2080005@speakeasy.net...
 > Looks very cool... I wonder what the price point is...
 >
 > malcolm wrote:
  > > you might find this interesting.
<font color=green>  > > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
  > > radical new form of water pulse Jet for Boats.
  > > regards malcolm
  > >
  > >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

they say it will use any water , and stainless boiler,
designed to be not fussy, time will tell
also any heat source can be used, solar collectors maybe for small boat
engine.
looks elegant and fun
regards malcolm


"Fred Williams" <nsf.williams.TakeThisOut@verizon.net> wrote in message
news:US1Ua.72545$kI5.65094@nwrddc02.gnilink.net...
 > Well unless you want to use sea water, the steam system is a net loss
 > requring some continious amount of "makeup" water. The vessel will be
 > required to carry both fuel and water. Or, as I said, boil sea water I
 > suppose.
 >
 > "Ed Edelenbos" <eded.TakeThisOut@speakeasy.net> wrote in message
 > news:3F20605F.2080005@speakeasy.net...
  > > Looks very cool... I wonder what the price point is...
  > >
  > > malcolm wrote:
   > > > you might find this interesting.
<font color=brown>   > > > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
   > > > radical new form of water pulse Jet for Boats.
   > > > regards malcolm
   > > >
   > > >
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

Injecting steam at "supersonic speeds" is going to require a really high
pressure boiler. Hot seawater is extremely corrosive and as the water
boils off and the salt concentrates it will get even more so.

Even in fresh water just think of the crud that will build up in the
boiler. Seems like a neat idea though.

Fred Williams wrote:
 > Well unless you want to use sea water, the steam system is a net loss
 > requring some continious amount of "makeup" water. The vessel will be
 > required to carry both fuel and water. Or, as I said, boil sea water I
 > suppose.
 >
 > "Ed Edelenbos" <eded RemoveThis @speakeasy.net> wrote in message
 > news:3F20605F.2080005@speakeasy.net...
 >
  >>Looks very cool... I wonder what the price point is...
  >>
  >>malcolm wrote:
  >>
   >>>you might find this interesting.
   >>>http://www.pursuitdynamics.com/default.asp
   >>>radical new form of water pulse Jet for Boats.
   >>>regards malcolm
   >>>
   >>>
  >>
 >
 >


--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: <a style='text-decoration: underline;' href="http://www.rutuonline.com" target="_blank">http://www.rutuonline.com</a>
Shameless Commercial Division: <a style='text-decoration: underline;' href="http://www.spade-anchor-us.com" target="_blank">http://www.spade-anchor-us.com</a><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

if this really works as promised it should be the propulsion of choice for
many crafts. simple, light and elegant.
but I still wonder if it really works?

price will be the main issue I guess. While the website says it is cheap to
build nobody mentions it will be cheap to buy. They have a patent on this
which may make this engine really expensive - at least the first couple of
years until it becomes mainstream.

Time will show..

#rb


"malcolm" <tamblyn RemoveThis @hickorytech.net> wrote in message
news:id6Ua.7135$Ly2.1147513@cletus.bright.net...
 > they say it will use any water , and stainless boiler,
 > designed to be not fussy, time will tell
 > also any heat source can be used, solar collectors maybe for small boat
 > engine.
 > looks elegant and fun
 > regards malcolm
 >
 >
 > "Fred Williams" <nsf.williams RemoveThis @verizon.net> wrote in message
 > news:US1Ua.72545$kI5.65094@nwrddc02.gnilink.net...
  > > Well unless you want to use sea water, the steam system is a net loss
  > > requring some continious amount of "makeup" water. The vessel will be
  > > required to carry both fuel and water. Or, as I said, boil sea water I
  > > suppose.
  > >
  > > "Ed Edelenbos" <eded RemoveThis @speakeasy.net> wrote in message
  > > news:3F20605F.2080005@speakeasy.net...
   > > > Looks very cool... I wonder what the price point is...
   > > >
   > > > malcolm wrote:
   > > > > you might find this interesting.
<font color=brown>   > > > > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
   > > > > radical new form of water pulse Jet for Boats.
   > > > > regards malcolm
   > > > >
   > > > >
   > > >
  > >
  > >
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

Sounds a wee bit like those little flash steam model boats we used to make
as kids.
A U shaped bit of copper tubing would project from the stern of the boat
just on the water line. And would run slightly down for about 3" to a meths
burner.
After heating up, the boat would be put into the pond or whatever, a little
water would enter the pipe and run down to the hot part where it would be
vapourised causing a jet of steam to come out of the pipe, propelling the
boat along with a series of Put Put Puts
Good fun, I think I might go and make one now for the Kids!
Patrick

----------
In article <U5ZTa.7114$Ly2.1143178@cletus.bright.net>, "malcolm"
<tamblyn DeleteThis @hickorytech.net> wrote:


 > you might find this interesting.
<font color=purple> > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
 > radical new form of water pulse Jet for Boats.
 > regards malcolm
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

the principle is similar to the WW2 V1 Pulse Jet Engine.
instead of flap valves they use pressure and cavity shape from what I can
gather.
and steam instead of burning kerosine, and of course water as the reaction
medium.
if the system is expensive when it comes out that will be a shame,
but should be easy (maybe) to DIY a system for a small boat.
I am sure somebody will do some plans and work it out.
regards malcolm

"Patrick" <lovering.TakeThisOut@waitrose.com> wrote in message
news:Ocednf5PCKdoy7yiXTWJkA@brightview.com...
 > Sounds a wee bit like those little flash steam model boats we used to make
 > as kids.
 > A U shaped bit of copper tubing would project from the stern of the boat
 > just on the water line. And would run slightly down for about 3" to a
meths
 > burner.
 > After heating up, the boat would be put into the pond or whatever, a
little
 > water would enter the pipe and run down to the hot part where it would be
 > vapourised causing a jet of steam to come out of the pipe, propelling the
 > boat along with a series of Put Put Puts
 > Good fun, I think I might go and make one now for the Kids!
 > Patrick
 >
 > ----------
 > In article <U5ZTa.7114$Ly2.1143178@cletus.bright.net>, "malcolm"
 > <tamblyn.TakeThisOut@hickorytech.net> wrote:
 >
 >
  > > you might find this interesting.
<font color=green>  > > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
  > > radical new form of water pulse Jet for Boats.
  > > regards malcolm
  > >
  > ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

Seems a bit like the old steam torpedos that use alcohol and water to make
steam. Kind of a flash system that turned a turbine.

If this thing requires a boiler, forget it. That's the major reason we don't
have steam engines in boats now. The boiler it more complex and heavy than
the engine.

Any boiler requires considerable attentions and maintainance... That's why
there is boiler redundancy in navy ships. Out of 4 boilers, you can figure
at least one is under repair or is due for repair.


--
My opinion and experience. FWIW

Steve
s/v Good Intentions
 >> Stay informed about: fun new engine 

"malcolm" <tamblyn.TakeThisOut@hickorytech.net> wrote in message
news:lUvUa.7211$Ly2.1160098@cletus.bright.net...
 > the principle is similar to the WW2 V1 Pulse Jet Engine.
 > instead of flap valves they use pressure and cavity shape from what I can
 > gather.
 > and steam instead of burning kerosine, and of course water as the reaction
 > medium.
 > if the system is expensive when it comes out that will be a shame,
 > but should be easy (maybe) to DIY a system for a small boat.
 > I am sure somebody will do some plans and work it out.
 > regards malcolm

If that system really works as proposed (including the mentioned efficiency
increase) and they are able to secure patents worldwide then they will be
able to give all makers of outboarders & marine engines a very hard time!
And of course they will ensure that no plans for their engine are publicly
available so that anybody cheating on their patents has to do his own
research. But if you get an original engine to examine it should be not too
hard to build your own.

The advantages are numerous:
Just think about having no heavy outboarder any more. It should be possible
to just have the lightweight jet part hanging of the transom and the heavy
boiler part may be located in the center of the boat.
Fuel and boiler may also be used for cabin & water heating as well, probably
also for a cooling system like the gas-powered camping fridges.
It should be possible to have boilers working with different fuel types
(just about everything that burns).
And it looks like the jet engine has very few moving parts and so
maintenance requirements should be very low. And that system should last
much longer than the average outboarder (if they get the corrosion problem
sorted out).

Without the outboarder you will need more solar power for the eGimmicks.

Time will show...

#rb<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

This unit appears to be some sort of ejector (jet) type pump, where the
momentum of high velocity steam is transferred to the water, raising the mass
of the entire stream so that the thrust is produced at lower exit velocity and
therefore lower energy flow.

Not only is the thermodynamics of heating and cooling questionable from an
energy conservation standpoint, ejector pump (NOT jets found currently in
marine use) efficiency is usually quite low, even when fluids for jet and
reaction are the same density. Do I see another "Magnetohydrodynamic drive"
scam in the works?

 >Subject: Re: fun new engine
 >From: "malcolm" tamblyn RemoveThis @hickorytech.net
 >Date: 7/26/03 7:05 AM Pacific Daylight Time
 >Message-id: <lUvUa.7211$Ly2.1160098@cletus.bright.net>
 >
 >the principle is similar to the WW2 V1 Pulse Jet Engine.
 >instead of flap valves they use pressure and cavity shape from what I can
 >gather.
 >and steam instead of burning kerosine, and of course water as the reaction
 >medium.
 >if the system is expensive when it comes out that will be a shame,
 >but should be easy (maybe) to DIY a system for a small boat.
 >I am sure somebody will do some plans and work it out.
 >regards malcolm
 >
 >"Patrick" <lovering RemoveThis @waitrose.com> wrote in message
 >news:Ocednf5PCKdoy7yiXTWJkA@brightview.com...
  >> Sounds a wee bit like those little flash steam model boats we used to make
  >> as kids.
  >> A U shaped bit of copper tubing would project from the stern of the boat
  >> just on the water line. And would run slightly down for about 3" to a
 >meths
  >> burner.
  >> After heating up, the boat would be put into the pond or whatever, a
 >little
  >> water would enter the pipe and run down to the hot part where it would be
  >> vapourised causing a jet of steam to come out of the pipe, propelling the
  >> boat along with a series of Put Put Puts
  >> Good fun, I think I might go and make one now for the Kids!
  >> Patrick
  >>
  >> ----------
  >> In article <U5ZTa.7114$Ly2.1143178@cletus.bright.net>, "malcolm"
  >> <tamblyn RemoveThis @hickorytech.net> wrote:
  >>
  >>
   >> > you might find this interesting.
<font color=brown>   >> > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
   >> > radical new form of water pulse Jet for Boats.
   >> > regards malcolm
   >> >
   >> >
 >
 >
 >


Barry Palmer, for HREF="http://members.aol.com/sevtec/sev/skmr.html">Sevtec<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

Reading through all this kind'a reminds me. Anybody remember "Cold Fussion"
in the news groups a few years back

"Barry Palmer" <sevtec RemoveThis @aol.com> wrote in message
news:20030726224502.07710.00000652@mb-m14.aol.com...
 > This unit appears to be some sort of ejector (jet) type pump, where the
 > momentum of high velocity steam is transferred to the water, raising the
mass
 > of the entire stream so that the thrust is produced at lower exit velocity
and
 > therefore lower energy flow.
 >
 > Not only is the thermodynamics of heating and cooling questionable from
an
 > energy conservation standpoint, ejector pump (NOT jets found currently in
 > marine use) efficiency is usually quite low, even when fluids for jet and
 > reaction are the same density. Do I see another "Magnetohydrodynamic
drive"
 > scam in the works?
 >
  > >Subject: Re: fun new engine
  > >From: "malcolm" tamblyn RemoveThis @hickorytech.net
  > >Date: 7/26/03 7:05 AM Pacific Daylight Time
  > >Message-id: <lUvUa.7211$Ly2.1160098@cletus.bright.net>
  > >
  > >the principle is similar to the WW2 V1 Pulse Jet Engine.
  > >instead of flap valves they use pressure and cavity shape from what I can
  > >gather.
  > >and steam instead of burning kerosine, and of course water as the
reaction
  > >medium.
  > >if the system is expensive when it comes out that will be a shame,
  > >but should be easy (maybe) to DIY a system for a small boat.
  > >I am sure somebody will do some plans and work it out.
  > >regards malcolm
  > >
  > >"Patrick" <lovering RemoveThis @waitrose.com> wrote in message
  > >news:Ocednf5PCKdoy7yiXTWJkA@brightview.com...
   > >> Sounds a wee bit like those little flash steam model boats we used to
make
   > >> as kids.
   > >> A U shaped bit of copper tubing would project from the stern of the
boat
   > >> just on the water line. And would run slightly down for about 3" to a
  > >meths
   > >> burner.
   > >> After heating up, the boat would be put into the pond or whatever, a
  > >little
   > >> water would enter the pipe and run down to the hot part where it would
be
   > >> vapourised causing a jet of steam to come out of the pipe, propelling
the
   > >> boat along with a series of Put Put Puts
   > >> Good fun, I think I might go and make one now for the Kids!
   > >> Patrick
   > >>
   > >> ----------
   > >> In article <U5ZTa.7114$Ly2.1143178@cletus.bright.net>, "malcolm"
   > >> <tamblyn RemoveThis @hickorytech.net> wrote:
   > >>
   > >>
   > >> > you might find this interesting.
<font color=brown>   > >> > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
   > >> > radical new form of water pulse Jet for Boats.
   > >> > regards malcolm
   > >> >
   > >> >
  > >
  > >
  > >
 >
 >
 > Barry Palmer, for <A
 > HREF="http://members.aol.com/sevtec/sev/skmr.html">Sevtec</A><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

Well Malcolm,
As a steam engineer of many years, let us just say I have serious doubts
that it will be a practical drive.

Brings up a memory.

When running a very old plant, we were forced by a bad situation to use
the emergency steam injector (venturi pump) to feed our boiler. The
amount of steam required actually took that boiler off-line (the real
and original meaning of the phase). The noise the the device generated
was astounding - it was louder than a surface blow for you other old
steamers.

I wish the inventors luck, and I would be very interested to see a fully
functional prototype.

Matt Colie
Lifelong Waterman, Licnsed Mariner and Perpetual Sailor

malcolm wrote:
 > you might find this interesting.
<font color=purple> > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
 > radical new form of water pulse Jet for Boats.
 > regards malcolm
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

and dont forget the "always having hot water to brew Tea with"

 >
 > If that system really works as proposed (including the mentioned
efficiency
 > increase) and they are able to secure patents worldwide then they will be
 > able to give all makers of outboarders & marine engines a very hard time!
 > And of course they will ensure that no plans for their engine are publicly
 > available so that anybody cheating on their patents has to do his own
 > research. But if you get an original engine to examine it should be not
too
 > hard to build your own.
 >
 > The advantages are numerous:
 > Just think about having no heavy outboarder any more. It should be
possible
 > to just have the lightweight jet part hanging of the transom and the heavy
 > boiler part may be located in the center of the boat.
 > Fuel and boiler may also be used for cabin & water heating as well,
probably
 > also for a cooling system like the gas-powered camping fridges.
 > It should be possible to have boilers working with different fuel types
 > (just about everything that burns).
 > And it looks like the jet engine has very few moving parts and so
 > maintenance requirements should be very low. And that system should last
 > much longer than the average outboarder (if they get the corrosion problem
 > sorted out).
 >
 > Without the outboarder you will need more solar power for the eGimmicks.
 >
 > Time will show...
 >
 > #rb
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine 

pulse jet engine

"Barry Palmer" <sevtec.DeleteThis@aol.com> wrote in message
news:20030726224502.07710.00000652@mb-m14.aol.com...
 > This unit appears to be some sort of ejector (jet) type pump, where the
 > momentum of high velocity steam is transferred to the water, raising the
mass
 > of the entire stream so that the thrust is produced at lower exit velocity
and
 > therefore lower energy flow.
 >
 > Not only is the thermodynamics of heating and cooling questionable from
an
 > energy conservation standpoint, ejector pump (NOT jets found currently in
 > marine use) efficiency is usually quite low, even when fluids for jet and
 > reaction are the same density. Do I see another "Magnetohydrodynamic
drive"
 > scam in the works?
 >
  > >Subject: Re: fun new engine
  > >From: "malcolm" tamblyn.DeleteThis@hickorytech.net
  > >Date: 7/26/03 7:05 AM Pacific Daylight Time
  > >Message-id: <lUvUa.7211$Ly2.1160098@cletus.bright.net>
  > >
  > >the principle is similar to the WW2 V1 Pulse Jet Engine.
  > >instead of flap valves they use pressure and cavity shape from what I can
  > >gather.
  > >and steam instead of burning kerosine, and of course water as the
reaction
  > >medium.
  > >if the system is expensive when it comes out that will be a shame,
  > >but should be easy (maybe) to DIY a system for a small boat.
  > >I am sure somebody will do some plans and work it out.
  > >regards malcolm
  > >
  > >"Patrick" <lovering.DeleteThis@waitrose.com> wrote in message
  > >news:Ocednf5PCKdoy7yiXTWJkA@brightview.com...
   > >> Sounds a wee bit like those little flash steam model boats we used to
make
   > >> as kids.
   > >> A U shaped bit of copper tubing would project from the stern of the
boat
   > >> just on the water line. And would run slightly down for about 3" to a
  > >meths
   > >> burner.
   > >> After heating up, the boat would be put into the pond or whatever, a
  > >little
   > >> water would enter the pipe and run down to the hot part where it would
be
   > >> vapourised causing a jet of steam to come out of the pipe, propelling
the
   > >> boat along with a series of Put Put Puts
   > >> Good fun, I think I might go and make one now for the Kids!
   > >> Patrick
   > >>
   > >> ----------
   > >> In article <U5ZTa.7114$Ly2.1143178@cletus.bright.net>, "malcolm"
   > >> <tamblyn.DeleteThis@hickorytech.net> wrote:
   > >>
   > >>
   > >> > you might find this interesting.
<font color=brown>   > >> > <a style='text-decoration: underline;' href="http://www.pursuitdynamics.com/default.asp</font" target="_blank">http://www.pursuitdynamics.com/default.asp</font</a>>
   > >> > radical new form of water pulse Jet for Boats.
   > >> > regards malcolm
   > >> >
   > >> >
  > >
  > >
  > >
 >
 >
 > Barry Palmer, for <A
 > HREF="http://members.aol.com/sevtec/sev/skmr.html">Sevtec</A><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: fun new engine