Here is a design with 4 nose cones that is called the Quad-Ceptor. Four ST-5 will
fit into an ST-13 tube. It is a snug fit and does slightly mis shape the ST-13 but,
I think it will work. Something funny-wierd may be happening with this file. I
change the aft fins to 4 in number and the margin drops to .06+ and with 5 in number
back up to 1.40+ with a C6-5 loaded. The drastic change is very strange indeed .

Enjoy and Thanks Again, JP

James Pierson
NAR#77907

Quad-Ceptor (18mm)
Launch guide length: 36.0000 In

MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
A8-3..................135.45702 Ft.............18.7212 ft/s
B4-4..................363.56955 Ft..............6.8692 ft/s
B6-4..................373.69751 Ft............. 3.4065 ft/s
C6-5..................891.07612 Ft.............10.3162 ft/s
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Attached Thumbnails

       

Attached Files

Quad-Ceptor.rkt (106.5 KB, 84 views)