I don't understand the formula? To calculate a rectangle with radiused corners you need the corner radius. What I remember, where "r" is the corner radius: A = H × W - (П × r^2) Example: If H = 2.00", W = 4.00", r = .125" A = 7.95"
You got me there. Less than 1% error... When your done calculating all the irregularities in this casting passage, Pull your head out, and get to work in the shop. I was asking to see if the flow area was closer to 7/16 dia or 12/16=3/4. Not 0.6%
