Edited by Smulder NL - 7/5/14 at 8:37am
Is there a smoker calculator on the internet that calculates in cm's? I only found Feldon's.
My tank diameter is around 25 inch, and lenght 50 inch. Feldon's calculator says
Anyhow, this is my tank:
Is it a 100 gallon tank?? I see!
there was a rubber membrane inside ....i think that thing holds 80 gallons...(http://www.deltaline.nl/deltaline/pompen--ketels--onderdelen/drukketels-wellmate-en-gegalvaniseerd/hydrofoorketel-horizontaal-varem/c-24/c-1380)
i was planning on making a firebox out of thick steel, Just a simple design with a simple door and a ashtray underneath it, behind the door.
But now i'm looking here, checking out what everyone is building....and i see some insulated fireboxes.
Can i do without?
Here is a very handy program for converting metric to other units. I have used it for years and keep it on my desktop computer and also available for smart phones in the applications store, it has volume, distance, speed and a large variety of engineering unit conversions. It will help you when you read the forum and wish to get a feel for what is being discussed in terms of units you are used to seeing.
Good luck with your build and keep us posted on your progress!
Thank you LenDecaturAL, very useful!
I did some measuring today... i messed up at the start.
The correct length is 42 inch and 24 inch diameter (so how many gallons is it???)
The fabricators measurements where measured including the water outlet.
a buddy of mine will bend a box for me.
this is what i get on feldons calculator....
Is my box going to be too big? I am going to use an ash pan and a coal basket.
It is approximately 75 gallons according to those measurements. You will want your RF plate mounted inside the smoker 5 1/2 inches from the bottom of the cylinder. This will work out well since the tank cut when measured up 5 1/2" will result in a cord width of approximately 20 inches which will match up well with the width of your firebox. That plate height will extend across the cook chamber and stop approximately 4" from where the tank dome begins. This will result in over 75 square inches for the critical areas required for good air flow in the smoker. Feldon's calculator needs 1.5 times the recommended area for a reverse flow smoker to assure good air flow, the numbers are correct for a standard offset configuration smoker. Since it gets cold in the winter in your area, it may be good to insulate your firebox if you plan on cooking much in the winter, it is something to consider.
Here is Feldon's calculator with your numbers.
The firebox will not be too big; however, you must use a false firebox size that equals close to 100% to obtain the correct numbers for the openings into the cook chamber, you can always build a firebox of any size you wish once the openings are calculated based on the cook chamber volume.
Thanks for your reply, I will take a good hard look at it again. Because i don't understand the whole story (language & math issue)
Dutch winters are not all that cold, and i'm not planning on using it on very cold days.
I think i understand, you are calculating with a small FB so you get the measurements for the opening in the CC.
If i make that horizontal cut in the tank, at 5 1/2 inch, how "deep" should i go then? Is that something important?
The idea for how "deep" to make the cut is to cut through the dome area and into the cylindrical section of the tank. There is an area where the pieces are doubled at the weld that is much more difficult to cut so it is best to cut on the other side (deeper) of the double thickness, it will be easier.
With your edit, you are correct and understand the reason a "fake" firebox size is used for CC opening, air intakes, and exhaust pipe sizes. Do not worry about your language skills, they are vastly better at a second language than mine! When I was in the Netherlands, I met several people that spoke 4 to 5 languages. I can speak English but butcher Spanish!
Alright then, back again.
Did not do anything on my smoker for a couple of months.
This weekend i decided that i should take a look, and do some quick measurements, to see howmuch steel i need.
My tank is not thick it is a few mm's....i can lift it on my own.
The firebox and rf plate i'm building will be thicker.
All and all This will not be a thick smoker, i'm hoping this will not be such a big problem on how the thing will work
It is only welded in the middle, no caps are welded on, so no
I did the cut for the fb in the cc.
came out not straight....
I need my dads laser, and need to put the tank level on the ground so i can make some straight cuts.
will do that next week.
For the door i'm thinking to do the horizontal cuts first.
And the vertical cuts not al the way.
That way, i can weld on the horizontal flanges, and weld on hinges. Flanges will be blind welded, and i will use those bullet style weld-on hinges at first.
When that is done, i can cut the vertical lines and the thing will come loose.
I am hoping that i reduce the warping of the door like that.
The horizontal flanges will be welded on with the door off.
I really like the endcap on this thing, gives it a nice touch with the bolts and all.
I'm going to weld it shut on the inside....and cut the pipe of.
Will do something with it for the look...not sure what.
Next thing to do is making the firebox and order some steel.