ORIGINAL: dieFluggeister
With a 6 lb load and a 5 lb plane you are still only 20oz/ft^2 wing loading.
Make it a biplane and cut that in half - now youre talking glider material!
What engine would you use ?
Where do you place the engine and stab ? What do you think is the chord length of the bipe ?
What prop would use ? Can you fit both the wings with landing gear in 1ft High box ?