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Dome Calculator - Forno Bravo Forum: The Wood-Fired Oven Community

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I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

Ask Me Anything New Forum Feature

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Dome Installation Video - Casa / Premio / Modena

Hello,

For many of you who bought a modular oven, you may have asked how we put the domes together when we build them. For those of you considering one of our ovens, we shot a video to make your install easier.

Check it out on our You Tube Channel.

https://www.youtube.com/watch?v=-7q7...jSniYogfUra06Q

If the link doesn't work, simply go to You Tube and type Forno Bravo Channel. The video title is How to Set your Forno Bravo Oven Dome Pieces.

Thanks for participating in our Forum. We will have more video content available soon.
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Dome Calculator

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  • Dome Calculator

    I was hunting the web for some dome info and found this website Dome Calculators

    Its got some useful bits for those that want to work out the finer points of their designs ! It does a lot of the math for you without the effort. What is good is the 'Level' field, which gives you the dome radius at whatever interval you request.

    It is unit independent, so you can put your calcs in as millimetres, inches, cables or whatever you desire.

    Cheers

    Peter

  • #2
    Re: Dome Calculator

    That's a good find. I once tried to find a way to locate the focii of an ellipse, to lay out a flower garden, and lacking a tool like this, I had to estimate by trial and error.
    My geodesic oven project: part 1, part 2

    Comment


    • #3
      Re: Dome Calculator

      dmun,
      There's a formula for the foci of an eclipse somewhere. I think I did that in physics a hundred years ago. I found this here:

      Foci of an ellipse - Math Open Reference

      An ellipse is defined in part by the location of the foci. However if you have an ellipse with known major and minor axis lengths, you can find the location of the foci using the formula below where
      F is the distance from each focus to the center (see figure above)
      j is the semi-major axis (major radius)
      n is the semi-minor axis (minor radius)


      Calculator
      In the figure above, drag any of the four orange dots. This will change the length of the major and minor axes. You will see how the foci move and the calculation will change to reflect their new location.

      Almost completely useless information in everyday life, unless your doing a project like yours.
      GJBingham
      -----------------------------------
      Everyone makes mistakes. The trick is to make mistakes when nobody is looking.

      -

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      • #4
        Re: Dome Calculator

        There you guys go again....

        confusing poor dave!
        My thread:
        http://www.fornobravo.com/forum/f8/d...ress-2476.html
        My costs:
        http://spreadsheets.google.com/pub?k...Xr0fvgxuh4s7Hw
        My pics:
        http://picasaweb.google.com/dawatsonator

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        • #5
          Re: Dome Calculator

          At any point on an ellipse, the sum of the distances to the two foci will always be the same. You can exploit this to draw one pretty neatly--put stakes at the foci, and attach the two ends of a string to the stakes. The string should have just enough slack that, when pulled tight, the point you're pulling reaches the edge. (i.e. longer string = bigger ellipse) Move the foci farther apart to make it longer and skinnier.

          Then by pulling the string taut in different directions, you can find your outline. Just be careful not to get it wound around the stakes.

          Of course, when the foci move to the same point, the ellipse becomes a circle.

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