For projects Odyssey,Therion, and TherionRaziel, the team has iterated a removable fin can designed such that the outer tube can be slid on and off the fin can itself. For Therion, the fins themselves are removable. Specs and pictures are below.
(PICTURES OF FIN CAN)
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Therion:
Therion's fin can is much heavier and sturdier than that of an L1 or small L2. Materials included:
- Phenolic motor mount tube
- Aluminum centering rings, thick enough to screw into the airframe (archived designs available in the EPDM (Depreciated))
- Carbon fiber airframe
- Aluminum thrust plate
- Carbon fiber/foam sandwich panel fins
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Once the fin can has been assembled, it is stored in four parts - the airframe, the fins, the hardware, and the motor mount. To assemble these pieces, put screws through the fin supports, threaded inserts in fins, and place a nut on the other side of the fin support. Slide the airframe over the motor mount/fin assembly. Place screws through airframe into centering rings (15 screws in total for Therion, excluding any for the rail buttons)
Improvements for ???
#weldit (CAD designs to come, pending actually making those designs)
Raziel
Raziel's fin can structure is essentially the same as Therion's. The major differences are as follows:
- Aluminum parts (thrust plate, fin supports, and centering ring, all pictured below) are welded together. This is stronger, more professional, and easier to assemble. None of these parts are permanently attached to the tube; instead, they can be slid in and out of the airframe and attached with 14x 8-32 screws.
- We only have one centering ring, 10" above the thrust plate. A second centering ring is extraneous.
- Although a motor retention plate was in place with Therion, the one on Raziel serves as the second rail button mount, approxiately 3' above the thrust plate.
Raziel's lower fin can:
#supasonic