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Jun 26, 2011, 08:48 AM
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earlwb's Avatar
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Flash Steam Engine powered tether boats

I recently ran across the flash steam engine powered tether boats and it is amazing how much speed they can get out of them too.
They had some information on them here
a 120mph steam engine powered hydroplane

The first video I ran across with one running fast:
British A/S class tethered hydroplane (1 min 51 sec)

Flash steam tethered hydroplane (0 min 32 sec)
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Jun 26, 2011, 09:56 AM
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Amazing ! never heard of them, great video, thanks
Jun 26, 2011, 10:12 AM
Grumpa Tom
Kmot's Avatar
Hi Earl, you into steam power too?
Jun 26, 2011, 10:09 PM
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earlwb's Avatar
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Yes I have built several steam engines over the years. I find them to be fascinating watching them run at low RPMs with all the parts moving about.

The big one in the back is one I built many years ago in the school shop class. It is self contained with its own boiler.
The other two were built years ago but more recently though. They still work too. I have some more, but I need to post pics on them when I get around to it.
Jun 27, 2011, 06:03 PM
Time for me to Fly...
Mr. Wiz's Avatar
If anyone runs across more information on these flash steam power engines I would really appreciate it if you would pass it along here in this thread.


Jun 27, 2011, 06:53 PM
Time for me to Fly...
Mr. Wiz's Avatar
Hey Earl!

That's the best antique engine website ever. Thanks for finding and posting it here.
Jun 27, 2011, 11:18 PM
Grumpa Tom
Kmot's Avatar
Very nice collection Earl!
Jun 27, 2011, 11:23 PM
Just call me "Mo"
mogogear's Avatar
I concur Earl--I love steam - and know little to nothing about flash steam and it's history--Great site!!

Thanks for posting
Jun 28, 2011, 04:25 PM
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ooyah's Avatar
Here are some pics of my Flash Steamer OOYAH.
The engine is designed around R Kirtley's 120 mph Tethered Hydro, he is the chap with the blue skip cap on the Vid.

My engine is 1.25" bore x .75" stroke Uniflow Poppet valve engine.
Boiler is 32 ft of 316 St/St x .25" dia all encased in St/St casing and powered by 3- burners paraffin ( Kerosene ) each jet with .025" dia hole.
The boat is radio controlled by steering and stopping, very much light the blue touch paper and stand back.

Here are some pics of the engine and coil build,I hope you like them, the boat is named OOYAH after the shout one gives on touching very hot steam pipes , along with other expletives.
Jun 28, 2011, 07:27 PM
Registered User


Fantastic plant - thanks for the pix!

Jun 29, 2011, 12:53 AM
Taking care of the pond.
Great build.
Jun 29, 2011, 01:45 PM
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earlwb's Avatar
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Congratulations on your success, that was a great build and I loved your pics too.
I found it interesting in the last pic where the heat of the steam caused the metal on the engine head to get discolored a little too.
Thanks for sharing.
Jun 30, 2011, 08:26 AM
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ooyah's Avatar
Hi Earl,
That pic of the cylinder head showing the burn marks is only after 2- runs of about 5mins, it will eventually be burned black.
The pipe coming from the boiler casing actually glows red in a diffused light and when you look down the flame tubes when the engine is running the St/St tube is nearly white hot and at the tail end of the coil ( the cold end ) it's bright red.
Here is a pic of my first engine which was 3/4" bore x 3/4" stroke with 22 ft of tube and this was good for 25mph. it is completely burned black compared to the new engine just installed and after a few runs is beginning to go black.

Jul 01, 2011, 10:00 AM
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earlwb's Avatar
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That is amazing what one can get a steam engine to do.
For years I just assumed the steam engines were all low rpm high torque engines (albeit we had steam turbines of course). Anyway discovering that guys were getting steam engines to turn super fast RPMs was a big surprise discovery for me.
So way to go, and thanks for sharing, we all appreciate it.
Jul 01, 2011, 11:15 PM
Klaatu barada nikto
coriolan's Avatar
The Stanley "steamer" car(1902-1924)were also flash steam power and could be ready to go in a few minutes from cold!

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