Inspiration, Documentation, Ideas, ...

[Pablo1965]

That looks pretty good to me.  The large fuselage mounted intakes for the rear engine are good, might avoid the problems with cooling that the Fokker D.XXIII had.  I like that bullet fairing on the tail.  The wing looks like it could do with a little more chord, the curved wingtips are a little modern & you could do to raise the tail so it's out of the prop wash, but they're minor points & I think you've got a good design there.

yes, I have doubt about the curved wingstips. Another doubt is over the landing gear.
Thanks for your help.

[Mossie]

You'd need a tricylce layout because of the rear prop.  The front wheel is pretty easily sorted, just slotting into the floor in the forward fuselage.  I can think off two ways you could do the main undercarriage.  Either folding inwards form the central wing panels (in the same manner of the D.XXIII), or create slightly larger booms so the the undercarriage can fold back into them, similar to the P-38.

[Pablo1965]

You'd need a tricylce layout because of the rear prop.  The front wheel is pretty easily sorted, just slotting into the floor in the forward fuselage.  I can think off two ways you could do the main undercarriage.  Either folding inwards form the central wing panels (in the same manner of the D.XXIII), or create slightly larger booms so the the undercarriage can fold back into them, similar to the P-38.

Thanks, I will do that but... I don't like the larger booms by other hand, is the way to do it.