ASTRO Barcelona Racing Equipment
abre01@gmail.com
Semi-Sphere for museum 3d world map
The project consisted in building a GRP semi-sphere of Ø 6 Mts. for projecting motion images of the Earth.
The complete earth illusion was achieved by reflection in mirrors below. The semi-sphere should be
removable and transportable by road to its final location in the museum. The dimensions of the elements
of the semi-sphere should meet these requirements. The team worked on:
- Plaster model,
- GRP female mould of a section of 1/8 of the semi-sphere,
- 8 semi-sphere "slices" (sectors) in GRP.
The components were laminated in monolithic GRP with inner lip assembly.
One of the segments with hinged access for maintenance of the earth images projectors.
Semi-esphere model support structure
Support structure partially covered with foam
Reinforcement layer of plaster with esparto
First plaster layer with compass
Finished surface in absence of 2nd partage
Application of sealant (Shellac)
Mould Gel-Coat spray
Mould GPR layers applied
Support structure
Adding partage lips for assembly
Segment with hinged access laminate
Pre-assembly verification and coupling
Last slice missing..!
Complete semi-sphere
In its final location