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Start with the tip concept and then add a sweep to move the fin CP effect back more in hopes that height can decrease and therefore thickness can decrease.
Analyzed without changing the weight and appeared to be the best option however upon doing a weight study found roughly 2.3in^2 increase in area and plate stock is 0.277lbs/in^2 for 3/16 thick meaning adding 0.637lbs in plate stock. Because of our own added material rounded up to 1.25lbs. dropped apogee for 1a case to 28557 which is significantly worse but still better than all other shapes. However lowered stability to 2.3 roughly meaning a size increase which would reduce flutter meaning a thickness increase and even more weight. This will for sure reduce apogee down to similar levels as KOTS 2.0 design. therefore shape was determined against.
If extra time:
Shape “Playing with Fire“:
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Other OR sim inputs
Fin shape with flutter considered
Think we should increase the fin tip chord slightly probs like 1 inch after weather thing is done.
Increasing fin thickness vs area for flutter resistance
It appears that changing fin area does not affect flutter FOS nearly as much as changing fin thickness so thickness changes will be used for weather studies.
Launch rail being shorter if want
Surface roughness improvement
Ran study on file with cycle 2 masses not quite fully done and apogee went from 29413ft to 31347ft changing from regular paint (2.36mil) to smooth paint (0.787mil). No noticeable impact on stability
Weight increase due to larger fin area on tip swept back shape
Analyzed and found roughly 2.3in^2 increase in area and plate stock is 0.277lbs/in^2 for 3/16 thick meaning adding 0.637lbs in plate stock. Because of our own added material rounded up to 1.25lbs. dropped apogee for 1a case to 28557 which is significantly worse but still better than all other shapes