I'm currently constructing my first solid fuel forge. It's a side blast JABOD with a 6" x 6" by 5" deep fire bowl. I plan to use charcoal as my primary fuel, but may give coal a try at some point in the future. I think I've got a good design and construction plan. But I'm having trouble figuring out what kind and size blower to get.
My questions are:
How much air (cfm) do I need to get the most out of the forge with charcoal?
What if I decide to try coal? How many cfm would I need then?
Since I'll probably try to get something a little bigger than necesssry, what's my best option for properly controlling the excess air flow? Blower intake valve? Blower outlet valve? Dump valve?
Thanks for any help you can provide.