ManOntheMoon
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- Dec 29, 2014
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I'm currently building a 4" Madcow Frenzy after losing my previous one over the summer due to a Cesaroni motor failure. My previous Frenzy burnt up on the launch pad on an extremely hot day over the summer (over 100 degrees C on the field). The 54 mm casing separated from the end-enclosure, I believe due to thermal expansion of the end-enclosure. The grains from the motor burnt the lower stage of the rocket. I had many previously successful flights and want to bring back the Frenzy to my fleet. On the previous build, I didn't apply an epoxy bead to the fins and outer airframe. However, I did fill the cavity between the motor mount and the airframe with expanding foam which added to the structural integrity. The fins were obviously epoxied to the motor mount. I never had any damage to the fins, despite a few hard landings.
As I rebuild the Frenzy, I question if I need an epoxy bead on the fins. I pose the question to the forum community if there is any scientific reason or actual examples of why I would need an epoxy bead on the fins attached to the external airframe if I am using expanding foam between the motor mount and the airframe?
As I rebuild the Frenzy, I question if I need an epoxy bead on the fins. I pose the question to the forum community if there is any scientific reason or actual examples of why I would need an epoxy bead on the fins attached to the external airframe if I am using expanding foam between the motor mount and the airframe?
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