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Parameter

Value (in)

Calculation Notes

Nominal Diameter (Dp)

54

 

Nominal Area (S)

2290.22

pi*(Dp/2)^2

Geometric Porosity

12%

 

Vent Diameter (Dv)

3.28

pi*(Dv/2)^2 = 0.0037*S

Disk Diameter (Dc)

38.88

Dc/Dp = 0.72 *from Phoenix

Gap Height (h2)

2.25

0.12*S/Band Length

Band Height (h3)

6.56

0.35*S/Band Length

Band Length (l=8*e)

122.145

pi*Dc

Suspension Line Length (lr)

91.890

12.73*DpDc

 

Sustainer Drogue:

-8 gores

 

Parameter

Value

Calculation Notes

Nominal Diameter (Dp)

36

 

Nominal Area

1017.88

pi*(Dp/2)^2

Geometric Porosity

12%

 

Vent Diameter (Dv)

2.190

pi*(Dv/2)^2 = 0.0037*S

Disk Diameter (Dc)

25.92

Dc/Dp = 0.72 *from Phoenix

Gap Height (h2)

1.500

0.12*S/Band Length

Band Height (h3)

4.375

0.35*S/Band Length

Band Length (8*e)

81.430

pi*Dc

Suspension Line Length (lr)

60

61.21.73*DpDc


Materials:


Manufacturing Steps: 

  1. Cut out octagon (disk) and rectangle (band) pieces with extra seam allowance on all sides out of nylon ripstop (seam allowance of 1 inch, to be double-folded)

  2. Fold ½ inch hems (double-folded) of the disk and band pieces and sew using double stitch with nylon thread

  3. Cut out the radial Kevlar reinforcements and mark where the loops for the lines should end and fold

  4. Sew ends of the band together

  5. Sew on radial Kevlar reinforcements from center through each vertex of the disk and the bad, leaving sufficient gap between the pieces and leaving the loops on either end for the lines

  6. Thread vent line through loops in the radial Kevlar reinforcements and finger trap in place; sew to secure

  7. Cut out 39in of thin Technora for lines → lines should be 30.6in

  8. Tie one end of line in bowline knot to chute through the created loops of the radial Kevlar reinforcements

  9. Mark 30.6in on all lines

  10. Tie bowline loop on end of thin Technora lines and check for length of 30.6

  11. Run around and make sure chute works

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