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Posted by Morris Dovey on March 27, 2010, 11:41 pm
On 3/27/2010 5:41 PM, Bruce Richmond wrote:

I've run West-style U-tube engines at frequencies between 1 and 1.6 Hz
and was disappointed with their behavior.

I'm pretty sure we can build an air tube engine that'll operate in audio
frequency ranges (since that's already been done :) ), but I'm trying to
build a pump and finding check valves that can open, close, and _seal_
in that frequency range might be iffy.

Note that West documented U-tube engines that push/pulled a water
pendulum on each cycle. AFAICT, that pendulum was a lossy method of
storing enough energy to sustain oscillation in a low-power engine that
performed poorly - and I want to shed those losses and proceed to
multi-horsepower engines.

Please forgive me if I don't seem very enthusiastic about pushing kW's
of power into an audio frequency oscillator... :)

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by Morris Dovey on April 3, 2010, 1:48 pm
On 3/20/2010 7:34 PM, Morris Dovey wrote:

After input from folks here, and some e-mail correspondence, I've
decided to go ahead and test this design. The only modification will be
to omit the right angle bend at the bottom, so that I can use a long
drill to increase the regenerator bore for successive tests.

Everything I've built so far has been constructed of materials that
could be worked in the context of a woodworking shop, but last week I
ordered some new tools for building these things:


As a woodworker, I feel a bit as if I'm going over to the dark side. :)

There will be a short pause while I learn to use these things, followed
by (I hope) a short video of a 1"/25mm bore engine running...

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by BobG on April 5, 2010, 4:01 pm
Those items are Durable Goods, and you will be able to use them to
repair your farm tractor and other survival tools after the guns are
confiscated and the constitution suspended.

Posted by Morris Dovey on April 5, 2010, 5:23 pm
 On 4/5/2010 11:01 AM, BobG wrote:

The guns won't be confiscated, no matter what the legislators dream up -
so I don't have worries in that department. There are just too many vets
who took/take their oaths to "preserve, protect, and defend the
Constitution" too seriously to permit it to be brushed aside - and many
times that many other stakeholders with similar feelings and motivations.

The litle mini-lathe is just a tad short on capacity for most work on
farm machinery - but I think it'll be adequate to help me find ways for
a billion and a half people around the world become more independent.

I would be proud to be a farmer, but I'm just your run-of-the-mill
computer geek, struggling to solve a couple of non-computer problems.
The good news is that 90% of the job seems to be simply a matter of
showing up for work, and that there are good folks around who're willing
to lend a hand with the other 10% when help is needed.

The fringe on the left and the fringe on the right keep forgetting that
there would /be/ no right _or_ left without some solid center. :)

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by Morris Dovey on May 4, 2010, 5:37 am
 On 4/5/2010 12:23 PM, Morris Dovey wrote:

I guess I might need to retract that - it might work for some small
parts like sprayer nozzles.

This weekend I finally put it to work turning a regenerator for the
inline engine. I added an early photo to


but I think it'll be a while before I'll be ready to take on anything
very complicated.

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

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