Thread: Mylar vacuum mirror
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Old 27-03-2015, 03:30 AM
jossupp
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jossupp is offline 		 
Join Date: Dec 2004
Location: quebec canada
Posts: 15
the formula compared
the catenaway and parabola have this math formula

generates a parabola
y=a x2 +bx+c
catenaway
y = a + bx + cx^2. parabole
y = a/2 * (e^(x/a) + e^(-x/a) chainette catenaway



jack 47'n 71'W
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