Owner's manual

104 — ITI SHEET METAL/HVAC PRO
With Offset = “y” and Length = “x,”
WrapperLength (aka StretchOut) = CenterlineRadius * ArcK * 4θ
HeelRadius = CenterlineRadius + (a ÷ 2)
ThroatRadius = CenterlineRadius – (a ÷ 2)
CenterlineRadius = =
SlantLength
4Sin(θ)
SlantLength
2
4*Offset
θ = ArcSin = ArcTan
Offset
SlantLength
()
= ArcTan
Offset
Length
()
y
x
()
APPENDIX C — OFFSET FORMULAS