[modeleng] Re: Juliet boiler question

I wouldnt be happy with 1/4" change (Ok, 0.222" but thats close enough!)
1/8" wouldnt concern me, so why not slightly reduce the tube-to-tube spacing 
so that you only alter the crown height be !/8" or less.
That boiler steams well, so the difference shouldnt affect it.

All the other items you mention can be fitted in, and as long as the bottom 
nut on the guage glass is well over the crown sheet, there should be no 
problem.

Alan


----- Original Message ----- 
From: "Phill Smith" <steam@xxxxxxxxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, May 23, 2009 4:10 PM
Subject: [modeleng] Re: Juliet boiler question


G'Day Gents,

Sorry to bother you all with my questions. Again.....

I have just been going through the boiler design as per the book, and
redrawing it to meet our boiler code. To fit the tubes into the boiler with
the correct size ligaments between the tubes, (and keeping the same number
and sizes of tubes) I found that the crown plate will rise 222 thou'. Can
anyone see any problems with this happening?

The problems I can see are as follows;

Bottom cock on water gauge lifting same amount and hence reducing gauge
glass length.
Less safety margin for beginners to play with in the water level.
Distance between longitudal stays and firetubes reduced. (though they can be
moved a bit as well, maybe)

Anyone else see any other problems? (Especially you Alan, as you have built
one!!!!)

Cheers,

Phill.

MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to,
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject 
line. 

MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to, 
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.

Other related posts: