Elica cilindrica

r = 2.5 (slider from 0 to 5)
h = 0.3 (slider from 0 to 5)
θ = 24.8 (slider from 0 to (8 * π))
a = CurveCartesian((r * cos(t)), (r * sin(t)), (h * t), t, 0, θ)