03-14-2009, 09:09 PM
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Master Modeler
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Join Date: Dec 2005
Location: Washington State
Posts: 654
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New Design: Double Duty
Here is my first attempt at messing with an 2 stage design. I have always to see the first
stage use a parachute rather than thumping to the ground so here is my idea. The 2nd stage has an extended motor mount that creates an hollow area between the ST-16 and the MM ST-7 tubes where one could tuck a chute in to be pulled out at seperation in theory. Just wonder if the chute will get too burnt?? Might work, might not.
Rocksimmers please give this file a good look over to see if this 2 stage assembly will work
or if I am in error. Also, can someone tell me what altitude the first stage seperates as I
can't seem to make much sence of the Data??
Enjoy and Thanks Again, JP
Double Duty 2 Stage (18mm)
Launch guide length: 36.0000 In
MOTOR.................MAX. ALTITUDE...........DEP. VELOCITY
B6-6, B6-0............ 679.78303 Ft............26.1619 ft/s
B6-6, C6-0.............1042.83916 F............18.5072 ft/s
C6-7, C6-0.............1319.49777 Ft...........29.5820 ft/s
James Pierson
NAR# 77907
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