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Old 03-14-2009, 10:09 PM
James Pierson James Pierson is offline
Master Modeler
 
Join Date: Dec 2005
Location: Washington State
Posts: 654
Question 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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Attached Thumbnails
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Name:  Double Duty 2D Image.jpg
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Name:  Double Duty 3D Image #1.jpg
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Size:  19.4 KB  Click image for larger version

Name:  Double Duty 3D Image #2.jpg
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Size:  15.1 KB  
Attached Files
File Type: rkt Double Duty 2 Stage.rkt (83.9 KB, 99 views)
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