Gents,

The top of the fuselage is finished.
The frame is strong and the shape is good.
Looking to the topside of the fuse I think there is no difference with a massive top.
I could not buy a massive block so I did make a surrogate.
I can make this top still a lot lighter when I remove parts of the frame before gluing is together with the bottom side of the fuselage. I have to do this for example near the tank and servo compartment.

The frame have to be strong because of the forces to bent the plywood in the last phase of gluing it on its frame in the past.

For who is trying the same for a fuse some technical bla bla for what is possible:

Balsa plywood 3 mm , 1/8 inch sheet material.
After bending the first time , I removed the inner sheet. Two sheets left.

Process of bending see one of the old posts.

Length of the top 80 cm, 32 inch
Wide 80 mm,( 3 5/32 ”) near the engine room 78 mm (3 1/16 ”) near the TE of the wing.
Distance over the surface measured near the engine room, 102 mm (4 “)
Distance over the surface at the highest point of the fuse, 120 mm (4 3/4”)
Distance over the surface near the TE of the wing 116 mm (4 9/16”)
I think the surface on highest part of the top is 15 % enlarged, c.q. less near the engine room.

The tail cone is nearly straight so no problem.

Bending near the LE of the stab, is end of the top, 40 mm wide, so radius is 20 mm (25/32)
Overall bending 180 degrees in every cross section so in the furure the vertical outsides are parallel with the side of the fuse .

For who has a question, let me know.
Cees

BTW, That's no coffee Ustik.