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XR71 Greenburd Rocksim Design File

• Manufacturer: Scratch

Comments: Actual measured CG is at 14.6 from nose. Although the current RS9 model is unstable with that CG, the real-world has confirmed that this model is stable. So, I armitrarily moved the CG.

Designer: Dick Stafford

Download scratch_greenburd.rkt

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

Kit Name: Scratch - XR-71 Green Burd {Scratch}

CG: 12.6000 inches from front
CP: 15.9618 inches from front
Margin: 3.44 Overstable

Parts Breakdown

• XR71 Greenburd 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]
• XR71 Greenburd Freeform Fin Set Freeform Fin Set
• External Pod
• F-104 project Conical 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: 3.50 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: 1.00 in]
• Apogee 13029 Ring
• XR71 Greenburd Trapezoid Fin Set Trapezoid Fin Set
• XR71 Greenburd Freeform Fin Set Freeform Fin Set
• External Pod
• F-104 project Conical 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: 3.50 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: 1.00 in]
• Apogee 13029 Ring
• XR71 Greenburd 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: 3.00 in]
• Estes 30162-2 Ring
• Apogee 13031 Ring
• Apogee 13031 Ring
• Estes ESTES 2321 Launch Lug
• Estes ESTES 2321 Launch Lug
• Estes Polyethylene LDPE Parachute (12.00 in)
• XR71 Greenburd Freeform Fin Set Freeform Fin Set

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