BOT's Power Pod

Here's the Power Pod Design from Sig that I use on both my 2 and 3 meter B.O.T.'s. As is, it's designed for 1/2A.

For my Medallion .15, I enlarged it enough to give good prop clearance, doubled the balsa core thickness, and notched the core as needed to receive two hardwood engine bearers. (Cabinet Shops usually have a bunch of free scraps that are perfect for the bearers)

I also used two pieces of ply for the base, so that it could match the wing-root's dihedral break at the center. Before adding the pylon and using 30 minute epoxy, I covered the center section with wax paper, butted the two halves together and with epoxy on their edges, and let the epoxy cure.

Once it was solid, I smoothed any bumps at the seam, troweled on a thin layer of epoxy, followed by a strip of fiberglass cloth (leave enough at to loop around the bottom later), and added the pylon with it's triangle stock. Once this cured up, I removed the mount from the wing, troweled on some more epoxy on the seam's underside, wrapped the fiberglass tape under it, then replaced it on the wing's wax paper to let it cure again.

I finished the pod with a thin layer of 5 minute epoxy, troweled on with a piece of balsa sheet. 1/16th works well, and you can cut it with scissors to give a straight edge.