Spiral Baffle in a CylinderDate: 6/24/96 at 21:32:5 From: Anonymous Subject: Formula for Spiral Baffle I work for a sheet metal shop. We have a project a customer would like done, but we are unsure of how to figure it. We have a cylinder, 48 in. dia. We would like to put a spiral baffle inside. What it needs to be is starting from the top dropping 30 in. and making only one complete spiral. What would the radius be for the piece to accomplish this? Any help you could give would be welcome. Date: 6/25/96 at 15:22:10 From: Doctor Anthony Subject: Re: Formula for Spiral Baffle You can calculate the length of the spiral by considering a right- angled triangle, with base equal to the circumference of the cylinder (= pi*48) and height equal to the pitch (= 30 ins). The hypotenuse of the triangle will be the length of the spiral path (= L). Using Pythagoras we have: L^2 = (pi*48)^2 + 30^2 = 23639.568 L = 153.75 inches. I hope this is the dimension you were wanting. -Doctor Anthony, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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