Putting the preliminary design pencil to the Flyin'King plans:

80" wingspan, 16" chord, two 50-60-size 2-strokes with 11" props. Weight will be up to 12 pounds and may carry up to a 5 pound payload.

The engines will be mounted on pylons below the wing and will draw fuel via pumps from a common center fuel tank in the 16-20 ounce size. The engines will be mounted 8" ahead of the CG at 10" from the fuselage centerline. The props of the twin engines will be 8" behind and 1" above the location of the prop of the design single engine.

Questions:

How much right thrust and down thrust should be incorporated into the engine mounts?

What sort of added reinforcement should be done to the wing at the engine mounting points? I see tying the engine pylons to the main spar, extending the center sheeting out past the pylons and possibly putting in a diagnonal brace from the pylons to the TE at the wing mounting bolts. What forces are involved with the engines?

--Bill