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XR-71 Geen Burd Rocksim Design File

Contributed by Dick Stafford, simulation help by Bruce Levison

Comments: kinda inspired by the SR-71; Updated RS7 sim using Bruce Levison's article on fins-on-fins from Apogee Newsletter 113

Designer: Dick Stafford, simulation help by Bruce Levison

Download scratch_greenburd_rev5.rkt

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

CG: 14.6000 inches from front
CP: 17.6357 inches from front
Margin: 3.11 Overstable

Parts Breakdown

• Chunga's Revenge 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 Conical Transition
• 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: 3.75 in]
• XR-71 Geen Burd Freeform Fin Set Freeform 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: 3.75 in]
• XR-71 Geen Burd Trapezoid Fin Se Trapezoid Fin Set
• Estes Polyethylene LDPE Parachute (12.00 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: 3.00 in]
• XR-71 Geen Burd Freeform Fin Set Freeform Fin Set
• XR-71 Geen Burd Freeform Fin Set Freeform Fin Set
• XR-71 Geen Burd Freeform Fin Set Freeform Fin Set
• Custom Conical Transition
• Apogee 13029 Ring
• Estes Engine hook Standard size Mass Object
• 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: 3.75 in]
• XR-71 Geen Burd Freeform Fin Set Freeform 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: 3.75 in]
• XR-71 Geen Burd Trapezoid Fin Se Trapezoid Fin Set
• Apogee 13029 Ring

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