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Masami Ōmachi: Paper-Based Solid Models
During the postwar period—when wooden solid models were the dominant form— Masami Ōmachi pioneered a unique approach using thick paper and celluloid to create fully movable, paper-based solid models. This page compiles his representative construction articles (February and March 1955), together with technical methods, references, and contextual background.
Ōmachi’s experiment was not merely paper craft as a substitute material, but rather
an experimental craft that balanced scale fidelity, structural strength,
range of motion, and geometric accuracy—a fundamentally different concept
from contemporary papercraft.
It should be noted that the expression “paper solid model” contains a
conceptual paradox, since *solid models* traditionally refer to aircraft carved
from *solid materials such as wood*.
However, Ōmachi transcended this limitation by realizing
a solid-modeling mindset through paper, establishing a field that was uniquely his own.
Published Articles
From the 1955 issues of *Sekai no Kōkūki*:
* February 1955: Paper Solid Model (1) — Main wing and engine section
* March 1955: Paper Solid Model (2) — Fuselage and tail unit
Overview & Characteristics
* A pioneering attempt at fully movable, all-paper construction in 1:50 scale * Internal mechanisms enabling retractable landing gear, ailerons, and flaps * Material-specific considerations—humidity, paper fiber direction, and paper selection * Not a simplified alternative to wood, but a distinct technical methodology
Although Ōmachi openly stated that he was not skilled with wood-carving tools, he did not position his work as a compromise. Instead, he proposed paper construction as a creative replacement, demonstrating a valuable form of diversity within postwar modeling culture.
Related Pages
Editorial Notes
* Original text has been preserved wherever possible, with minimal annotation for clarity. * Images are reproduced from Ōmachi’s personal album and organized for publication. * Bibliographic information and quotation ranges are properly managed; no unauthorized reproduction is made.
Planned Additions
* Reconstruction tests of the paper-based method (comparison with modern materials) * Redrawn high-resolution diagrams of movable mechanisms * Additional letters and historical materials from Ōmachi’s lifetime * A comparative study page between wooden and paper-based solid models