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Double-D Rocksim Design File

• Manufacturer: Scratch

Comments: External design only to find CP. Construction details should not be inferred.

Designer: Matt Stum

Download scratch_double_d.rkt

To use the design file above, you need a copy of Rocksim, a rocket design and simulation program.

Kit Name: Scratch - Double-D {Scratch}

CG: 26.5593 inches from front
CP: 37.3454 inches from front
Margin: 8.01 Overstable

Parts Breakdown

• Double-D Ogive Nose Cone
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 18.00 in]
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 1.75 in]
• Custom Ring
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 18.00 in]
• Double-D Trapezoid Fin Set Trapezoid Fin Set
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 5.25 in]
• Custom Mass Object
• Estes Polyethylene LDPE Parachute (18.00 in)
• Custom Ring
• Custom Ring
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 8.87 in]
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 8.12 in]
• Custom Mass Object
• Custom Ring
• Custom Ring
• Custom Ring
• Double-D Trapezoid Fin Set Trapezoid Fin Set
• Custom Estes BT 1090 1.0173 inches 25.84 mm 0.7250 inches 18.42 mm 0.7250 inches 18.42 mm 0.9500 inches 24.13 mm 0.9500 inches 24.13 mm 0.2400 inches 6.10 mm 0.0000 inches 0.00 mm 1.5950 inches 40.51 mm 2.5550 inches 64.90 mm 1.8000 inches 45.72 mm 1.5200 Body Tube [Length: 1.75 in]

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