Experimental Norse-Kiwi Hybrid Oven!

[Greenman]

Re: Experimental Norse-Kiwi Hybrid Oven!

A small electric fence might keep the little tackers off the dome for long enough for it to get the mortar up to the job!

Gotta love kids with spirit!

[cobblerdave]

Re: Experimental Norse-Kiwi Hybrid Oven!

Gday wildflower
Now that's a bit tricky , Welch arch. I had a bit of a head scratch Id heard of this one before. Goggle didn't help ( don't try flat arch unwise your in to the podiatric section!)



Is this what you mean? I'm pretty sure" brickie in Oz" brought this one a few years ago. So this doesn't mean I'm really that smart..... its just that I can remember things' yes yes I'm not that old: cool:

regards Dave

[Tscarborough]

Re: Experimental Norse-Kiwi Hybrid Oven!

You can take the form out anytime. Using that chunk of metal for a face will work, but it will be decorative only, that is, you will still need to build masonry inside of it to form the throat.

[david s]

Re: Experimental Norse-Kiwi Hybrid Oven!

My apologies Wildflower. I've come late to this thread and did not see your earlier pics which clearly show the end wall under your vault, so ignore my caution, you've done it right. This is an interesting build, it's nice to be able to transform something old into something new.

[Wildflower]

Re: Experimental Norse-Kiwi Hybrid Oven!

Hey there,
No worries Davids, it's only thanks to the advice I've got in this forum that I've managed to build the oven as it is, and all advice and comments are welcome.
CobblerDave, it was Brickie in OZ's recommendation to someone in this forum a while ago to put in a Welsh Arch...I found that whilst trawling for solutions to my flat arch issue (not feet). It seems to have worked for them, so I'm going to give it a whirl. I think I'll do a combination with a normal curved arch towards the exit. This should enable the smoke to be funnelled up the chimney pretty well.

I touched up the inside of the vault with mortar today and I must say it's looking pretty posh (to go with the posh oven front, eh Dave!).

Cheers,
Zoe.

[Tscarborough]

Re: Experimental Norse-Kiwi Hybrid Oven!

As drawn that is a weak arch. The amount of masonry above the arch needs to be at least equal to width of the opening for that to be used.

[Tscarborough]

Re: Experimental Norse-Kiwi Hybrid Oven!

Here is what I mean. In the first picture the red area is the amount of material the arch is sustaining. If there is not enough masonry above the arch to contain that triangle, then the second picture illustrates the area the arch is supporting.

[Wildflower]

Re: Experimental Norse-Kiwi Hybrid Oven!

Well, it might be back to the angle iron then, as I don't have enough space to cap the the welsh arch with masonry equaling the width of the space.
Thanks for the input, Tscarborough.

[Wildflower]

Re: Experimental Norse-Kiwi Hybrid Oven!

I've filled in the joins between the bricks in the vault ceiling, and am pretty happy with how the vault looks...just hope it doesn't crack and fall to bits when it gets hot!
So...I think it's time to get amongst it and go for a lowish curved arch, along the lines of the one indicated in the photo below, where I've just laid the side and first arch bricks...obviously there would be a complete closure against the main vault, with a largish gap in the middle to allow the air to flow up the flu.
If I'm going down the wrong track here, please let me know, otherwise I plan to charge ahead and start mortaring up the side bricks soon!

[cobblerdave]

Re: Experimental Norse-Kiwi Hybrid Oven!

G'day
I recon the flat arch should work, it's not like its got to support a large amount of weight
Regards dave

[Wildflower]

Re: Experimental Norse-Kiwi Hybrid Oven!

Well, I've discovered THE ANGLE GRINDER!
Wowza, what a scary piece of machinery! I had been putting off using it, but realised I had to make some cuts to angle out the main chamber to exit arch where the opening is offset. It was quite fun working out which angles to cut the bricks, a little stressful doing the cuts themselves.
I was five bricks short, so had to go and buy some from the hardware store. They are a lot tougher to cut than the white, second hand bricks I have. I wonder if they have different expansion rates? I wonder if I'm thinking too much about ovens? teehee.
Anyway, after what I would call relative success in the angle cuts I decided to take a leaf out of the experts such as Tscarborough's books and notch the outer arch bricks. This went fairly well, but I think the form is a bit asymmetrical, so the end result may be a little disappointing...will have to wait a few days before I take the form out to see. i'm also worried now that there is too much mortar exposed to the heat of the fire, I should've cut pies to fill the wedges, shouldn't I? Oh well, too late now.
I'm going to create a funnel-like opening in the for the air to draw out, a bit like Sharkey's NSW build (but on a much smaller scale)...hopefully all going well, will finish in a week or so, then I'll leave everything for a few weeks and then start a curing fire.
Am I right in thinking you should do lots of curing fires before putting on the insulation?
The last step is building a roof, I like Fornax hominus' roof with black iron. What do you think?
Thanks,
Zoe.

[cobblerdave]

Re: Experimental Norse-Kiwi Hybrid Oven!

G'day wildflower
Following Tzcar build with the offset door is great idea. Apart from the obvious,pizza, any fire in the oven cooking you best to have the fire to the side so you can cook and see if things are just cooking and not burning.
Again Tzcar idea of notching the brick so your front wall again is under your front arches, well you can't get stronger.
Be safe with that angle grinder. They built for 2 handed operation use 2 hands and you get to keep both for other ordinary tasks like... Cooking.
Love to watch you progress , I must find time to check out that roof
Regards dave

[cobblerdave]

Re: Experimental Norse-Kiwi Hybrid Oven!

G'day again
Found it! Didn't really take much time either as this site gets bigger it can take sometime



Very different from your standard oven. Are you thinking of doing the stone cladding as well

Regards dave

[SevenAcre]

Re: Experimental Norse-Kiwi Hybrid Oven!

Hello Wildflower (and dave ),

Looking at your entry arch transition to the oven vault, I think you might be setting yourself up for a future problem of creosote build up. Please see this thread by Boerwarrior and specifically the response by Sablespring on post #47. Here is the link: http://www.fornobravo.com/forum/8/32...tml#post152954

I don't know for sure that this will be an issue with your build, nor do I know how you would correct for it; however, I do know that I have seen it to a lesser extent in my oven, and am thankful I took steps to avoid hard edges and transitions after I read Sables response. We don't always fire our oven to clear, especially when cooking "normal food" other than pizzas. It's something to consider.

-J

[Wildflower]

Re: Experimental Norse-Kiwi Hybrid Oven!

Hey Dave,
Thanks for the encouragement. I treat the angle grinder with a lot of respect - two handed operation with gritted teeth every time...yikes.
I'm a little flummoxed by the news I might get creosote dropping down onto my pizzas...
I wonder if I should pull out the formwork and have a look inside, see if I can smooth out the transition from main vault to entrance arch. I wish I'd known about this earlier. However, I was following people like Tscar, and I think their transitions were 90 degrees, not smoothed at all.
Sigh.