Better known as Bolt Circle Diameter, the formula is d / sin (1/n x 180) where d is the distance between the centers of two adjacent bolts and n is the total number of bolts.
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propeller pitch= 2 pi r tan a
Length of helical stirrups = 3.14*d*n + p*n d= diameter n= no. Of turne ( = height/ pithh) p = pitch of helical stirrups
Yes, it can have any pitch, the pitch is the ratio of the number of units (usually inches) run (horizontal) to the number of units rise (vertical). The units of run is always 12 therefor if you measure over 12 inches then measure up at 90° that number represents the pitch. If you measure over 12 inches and measure up 8 you have an 8/12 pitch roof.
All roofs have a "pitch" even flat roofs have a pitch required to allow water to drain from the roof.
what is the pitch point