Author Topic: High speed boat engine recommendations  (Read 1436 times)

Offline Nicolas

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  • Hawkes Bay, New Zealand
High speed boat engine recommendations
« on: December 28, 2014, 01:04:06 PM »
I'm starting to think about building a boat......

Thinking along the lines of a not too big flash steam boat that can be used on smaller ponds, capable of reasonable speeds but not crazy like the ones attached to rope going around a pole at over 100mph, those scare the crap out of me :Lol:

So thought I'd start asking around about a suitable engine. Something along the lines of the Stuart sun possibly. Any plans around? Elmer did make a boat engine similar to the Stuart, not sure if it is ideal though......

Thanks :)

Nicolas

Offline lohring

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Re: High speed boat engine recommendations
« Reply #1 on: December 28, 2014, 06:34:02 PM »
An excellent topic on this subject is here:
http://www.modelenginemaker.com/index.php?topic=2760.0

The problem is that George only has an on-off engine control.  Full throttling a monotube boiler is a lot tougher problem.  I'm working on the issue.  There are a lot of mechanical solutions but none look easy.  This is an electronic system for a moderate performance controller. 

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CCgQFjAB&url=http%3A%2F%2Feddy.dawa.de%2FDUK-flashboiler%2Felektronisch_gesteuerter_Durchlaufkessel-engl.pdf&ei=AUygVPz-OYnvoASv2IKgCQ&usg=AFQjCNHuiDPrerIRCCNlfYByWxqbuQuYhg&sig2=jf3dsqx4xAB1a27UkhXegg&bvm=bv.82001339,d.cGU

I think an Arduino controller would be the current choice because of all the canned programming solutions.  The above system used the controller to maintain temperature while controlling speed with a variable water feed.  That probably leads to a variable pressure system similar to one tried a long time ago in cars.  See the NASA Report http://ntrs.nasa.gov/search.jsp?R=19750006062  I would be glad to share my research on the subject.  I've just started to build the hardware to try everything first on a test bench. It will all take a lot of time.

Lohring Miller

fcheslop

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Re: High speed boat engine recommendations
« Reply #2 on: December 28, 2014, 08:11:35 PM »
Hi Nicolas, for a first go at fast (ish) steam maybe High Speed Marine Steam by AA Raymon
A double ten running on flash steam ???
Cheers