We do our NON removable Don't want that door accidentally coming off
Been a while since my last update. Christmas and New Years out of the way and back at it. Just a few pics of my progress.
Start of the RF plate and drain.
Got the RF plates tacked in place.
Started work on the slides for the racks. Notice I have yet to hard weld the RF plates. I decided it may be best and possibly help avoid warp-age if I got weld the slides in first. We'll see how that works out.
Got my racks framed up and my expanded metal cut. Rainy weather here is keeping me from finishing the racks.
Thinking of getting started on my trailer before I cut the hole and install my chimney pipe, that way I still have the two pickup points attached.
Well after taking a good hard look at the trailer I purchased I've come to the conclusion that its way way too big. The frame width (spring center to spring center) is 67". If I put the smoker in the center to maintain the CG, I would not be able to reach the smoker standing on the ground to the side. I'm rethinking it for now and figure I need a 48" spring center axle.
So I'm back to the smoker and thinking about the exhaust stack. I have a few questions. Which is preferred, stack going straight down into tank top or building a plenum of sorts and putting the stack off to the end of the tank? How about dampers? Is there any reason (is it necessary) to add any type of dampers to the top of the stack or incorporate one into a plenum?
After going back and forth on the option of using the boat trailer I had purchased or building a smaller trailer, I purchased 3 sticks of 11ga x 2 x 3 tubing and started my frame. I got a pretty good start on it yesterday.
Glad I looked at the calculator. I noticed it got revised right after I posted my numbers. Therefore my
Volume in cubic inches X 0.017 = Exhaust Stack Volume in cubic inches, above the CC.... (ESV) 952.79
has changed to
Volume in cubic inches X 0.022 = Exhaust Stack Volume in cubic inches, above the CC.... (ESV) 1233.02
which means my stack that was
ESV in cubic inches_____________________________ ... = Stack Length in inches (36" +/-) 6"ID = 33.70
0.7854 X Stack Diameter X Stack Diameter
and has now changed to
ESV in cubic inches_____________________________ ... = Stack Length in inches (36" +/-) 6"ID = 43.61
0.7854 X Stack Diameter X Stack Diameter
almost 10" taller. I already have my 6" ID pipe so there's no turning back on the ID size. Luckily I had it cut at 48".
Now I'm wandering about the "Stack Length in inches (36" +/-)". I'm not gonna be close to 36". What do you guys think?
Dave, Is there a way, instead of just editing the thread in the future, that you can make a comment on the last page of the thread so it automatically goes to the top the list? I was not aware that the calculator had change until today's post by Brad.
Quick questions Dave, is the 43.61 stack length above the smoker or does it include the amount I drop down into the smoker? Also, whats a good depth in from the top or height above top rack to end stack? I intend to cut an angle on the section inside the CC.
Not Dave, but yes above the smoker. One thought, you have spent a lot of time and money and as far as I can see have a great looking smoker. You said you already had the 6" But.....
think about going with 8", if you don't want as long a stack, you are looking at almost a 4 foot long stack an 8" would be 25,28 " think about what look you want, if you are OK with the long stack go for it. Get someone to hold your stack at both lengths step back and see what you think. Both will work
So I set the 6" ID stack in place and yes it looks too tall to me.
I have acquired a piece of pipe that is 8.625 ID and 9.125 OD and run the numbers per the calculator here on SMF and come up with 21.10". I think I like the shorter stack better, but maybe not that short. I figure a little longer can't hurt but that's a big a$$ hole in the top and on the end cap at that.
So what would be the worst case scenario if I went back to my original #'s on post 23, or maybe halfway between the #'s in post 29?
Well, don't get wrapped around the axle on the stack; a 6"ID stack at 36" will be fine.
The worst case scenario is wanting to change the stack later for the possibility of more even temps in the CC.
Bear in mind that is only a possibility. A larger ID stack does not guarantee more even temps.
As worst case scenarios go, that is a minor one; changing the stack is one of the easiest mods you can do on a smoker.
That's what my frame is made of, 1/8 (11ga) x 2 x 3 tube.