Fires are burning in the cannon furnace

furnaceQuick update:

Turns out that we do not have the connectivity to set up a webcam out at the furnace, but we will try to post pictures as they are available.

In the meantime, we began preheating the furnace on Monday and have been heating it slowly since with a fire at ground level in the furnace ash pit. This morning the interior reached about 1000⁰ F. The folks from Newport News Shipbuilding have been monitoring the temperature with a “point and shoot” pyrometer and have been providing us with some other high-tech assistance. We’ll fill everyone in on details later.

At this point, we want to hold a temperature somewhat below the melting point to heat up the entire mass of the furnace, and, as we get closer to pouring, we will build a fire in the archway under the melting floor to ensure it is heated and the bronze doesn’t freeze to it. We also are playing with chimney dampers and an iron door covering the upper ash pit opening. When it is decided to start ramping up the temperature for the melt, we will move the fire up to the fire grating higher in the furnace. Don’t know yet exactly when it all will take place. We’ll wait until it is ready, whenever that is.

Comments

  1. says

    Well on the bright side you can use it as a mortar:) All joking aside it is a very interesting project. I am amazed at how much skill and knowledge is required to make something that seems simple but obviously is not. Good luck and good job to all involved! Cant wait to see the final project.

  2. Jim W says

    Morning,

    You are you using a point and shoot pyrometer. How would 18th century cannon makers determine the correct temprature?
    Trial and error?

  3. Christine Hansley says

    To the Cannon Crew,

    Sad that we can’t see what is going on by webcam. Pictures will do when you have the time. The pour is more important.

    Again, THANKS to NNS for their help.

    Have a great and safe holiday. Wish we could be there.

    Chris

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