FT Arrow Blunt Nose Pod
Description
Since there's zero room to add electronics/batteries in the original design, I decided to make a blunt nose pod. This pod will easily accommodate 3-4s 2200mah packs and add quite a bit of strength to the plane. I scratch built the plane and allotted for the extra width of the pod. You'll need to add roughly 25mm to each wing half on the bottom section. Leave the mounting slots where they are as the skid uses those slots for mounting. Please double check before you cut the foam out. I used tiled plans and they tend to be a little off if you don't tape them together perfectly. If anything you could cut the bottom section a little bigger and trim down to fit. I recommend using PETG or ABS for printing the pod. I've had bad luck with PLA melting where the motor bolts on with any firewall I've made. Unless you're using the appropriate prop and your motors run cool, you can use PLA. I printed the pod with 10 percent infill, 1 perimeter, and only 3 top/bottom layers to keep weight down. You can experiment with the settings how you see fit. Lid doesn't matter as much, I did mine with 5 percent infill and used the same other settings for the rest. Lid attaches with 3mm screws. Should be a snug fit into the pod. I don't have a fancy way to keep the lid down. I'm just using body clips used on rc car bodies to keep the lid down. I have the holes slotted into the posts for this. The lid can be difficult to open, I just drilled a small hole and attached a screw to use as a handle to open it. If you think of a better way, message me! Skid plate, I did 4 bottom layers, and 10 percent infill. CG should be 48mm from the firewall. ***Update**** -Maiden flight went great! I recommend setting CG at 48mm from the front of the firewall. Plane flies well, I dialed my dual rates down to about 60 percent on elevator and aileron. Running 30% expo as well. -I will design some winglets soon for this. The ones I'm using currently are ok, just need to be a little taller for better yaw stability. I might make some extra fins that glue onto the sides of the center pod. -I moved the holes back for the camera mount since my camera was sticking out of the front. Now it should be well protected inside the pod. -Final thoughts, I think I might extend the firewall outwards a bit and try to make it channel air directly to the motor. Right now the motor doesn't get any cooling and the prop is loud. If I move the motor back it will help with sound and cooling. It's fine for now, just thinking ahead a little.
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