[SEL] old engines on Propane question

[Steve Gray]

  Yep, that be the one. I got the plans from a different source, but 
it's the same thing. I made mine out of brass to go along with the rest 
of the plumbing on the engine. My question would be would this valve be 
big enough to work on a full size engine? I would guess not.

   As seen in the front view picture 
(http://www.oldengineshed.com/graphics/mery114net.jpg ),  I use the 
small Coleman type propane tank run through a regulator used on propane 
gas grills. This steps the pressure down to about 11" of water column, 
which if I remember right, is just a few ounces of pressure. I then pipe 
that to the demand valve (not shown in this early picture) which is 
plumbed fairly close to the engine. From there, I changed the kit plans 
of using a pair of adjustable needle valves to control fuel and air flow 
into a mixer, to a setup more resembling the mixer valves used on the 
original engine. Most of the guys running oil field engines are familiar 
with the air and fuel valves dumping into a simple pipe Tee as a mixer. 
The little 5/16"  miniature ball valves I use are a little tricky to set 
right but work fine once there. This is my first use of propane and at 
first, I wasn't too sold on it until I had the demand valve in the 
system. I can post some pictures of the valve if anyone wants a gander 
at it.

- Steve

-- 
Steve Gray
Member EDGE & TA, Br. 49 & 13
Sonora, California USA
e-mail:   segray at mlode.com
Home page:   http://www.oldengineshed.com



F86SABRE wrote:

> There is a plan for building a propane demand regulator on the website 
> of the Florida Association of Model Engineers.  Just go the website, 
> Tips and Info, and Assorted Model Engine building tips.  It is the 
> third one from the top.
> Dan Bousman
> ----- Original Message ----- From: "Alan Bowen" <alanb2 at webtv.net>
> To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
> Sent: Friday, November 19, 2004 8:25 PM
> Subject: Re: [SEL] old engines on Propane question
>
>
>> Steve & Larry,
>>
>> Yes Steve,
>> Please do tell and keep it on-list.
>> I am also very interested.
>>
>> Thanks,
>> Alan Bowen
>>
>> ~~~~~Larry Anger wrote~~~~~
>>
>> Steve - I'm very interested in propane also. Could you give me some
>> insight as to how you constructed the "demand valve". I would appreciate
>> your hwlp so I could make one also.
>>
>> Thanks, Larry Anger, Tillsonburg, Ontario, Canada.
>>
>>
>> Steve Gray <segray at mlode.com> wrote:
>> Hi Harry -
>> I also recently entered the world of propane, this being on a newly
>> completed model. At first, I tried the simple approach of just piping
>> the gas to the mixer (two ball valves, one air, one gas), but didn't
>> like the idea of the unchecked gas flow if the engine stalled, and the
>> results weren't that good as far as operation. I ended up fabricating a
>> 'demand valve' which made all the difference in the world. The thing
>> runs so good now I hate to tear it down to paint it! The engine is a
>> Mery like those 2 that Reg recently finished. Pictures, sound and a
>> video are located at the top of my main web page.
>> - Steve
>> -- 
>> Steve Gray
>> Member EDGE & TA, Br. 49 & 13
>> Sonora, California USA
>> e-mail: segray at mlode.com
>> Home page: http://www.oldengineshed.com
>>
>> Alan Bowen  alanb2 at webtv.net
>> Williamsburg, Michigan
>>
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