O Jornada nas Estrelas: O Manual Técnico da Próxima Geração , escrito por Rick Sternbach e Michael Okuda que eram designers visuais para o programa, bem como os principais "consultores técnicos" (sobre uma combinação de ciência real e ciência ficcional razoavelmente consistente do programa), sugerem que a forma da Enterprise-D foi determinada em grande parte pela física da urdidura, como bem como a nova exigência de que o disco seja capaz de se separar e da "Seção de Batalha" e de ficar deformado por algum tempo (veja a resposta de Tango a esta questão para mais sobre essa idéia do disco" coasting "apesar de não ter seus próprios motores de warp ). De p. 5:
Seen from a comfortable distance of two or three kilometers, the
starship takes on the graceful lines of a nonrepresentational organic
sculpture. Nature has determined the flow of the design, adhering
closely to mathematical formulae at work in the universe surrounding
the builders. Even in the desire to expand beyond the apparent limits
of the natural world, familiar forces create familiar shapes. As the
rapid aquatic and avian creatures of dozens of habitable worlds
independently developed the unmistakable attributes of streamlining,
so too did their interstellar cousin.
The combination of forces produced within the warp engine core and the
flow of space and subspace around the vessel created the particular
engineering solution to the problem of faster-than-light travel. The
initial Starfleet requirement that a single spacecraft be able to
perform as three distinct vehicles presented some rather
complex—though some engineers not normally afraid of numbers preferred
the word "daunting"—computational challenges.
The docked configuration presented the most efficient use of warp
flight forces, but the Battle Station was also required to perform the
specifications at warp velocities on its own, and the Saucer Module
would have to have the capability of high sublight speed and possibly
survive a separation at high warp. Scientists and engineers throughout
the Federation, with all the deportment of composers and conductors,
arranged sweeping curves, described vast volumes, and summoned up
fantastic energies to bring their creation into existence.
Também na p. 66 eles escrevem:
Third, the shape of the starship hull facilitates slippage into warp
and imparts a geometric correction vector. The Saucer Module, which
retains its characteristic shape from the original concept of an
emergency landing craft, helps shape the forward field component
through the use of a 55º elliptical hull planform, found to produce
superior peak transitional efficiency. The aft hull undercut allows
for varying degrees of field flow attachment, effectively preventing
pinwheeling, owing to the placement of the nacelles off the vehicle
Y-axis center of mass.
Além disso, no livro EUA. Enterprise: Owner's Workshop Manual , escrito por Ben Robinson e Marcus Riley com Michael Okuda como consultor técnico, há uma barra lateral na pág. 97 intitulado "Warp Development Theory":
The warp "bubble" in which a starship rides at faster-than-light
speeds is not a static structure. Rather, it is a flowing, pulsing,
ever-shifting field of energy that dictates the shape of a particular
starship. Even minor changes in starship design must undergo extensive
testing and optimization to ensure safety and propulsive efficiency.
Field geometry is particularly sensitive to variations in the position
of the warp engine nacelles. While in conventional (slower-than-light)
spacecraft design, the propulsive thrust vector must travel through
the vehicle's center of mass, warp propulsion is quite different. Warp
drive requires the nacelle axes to be offset from the vehicle's
centerline to create the propulsive imbalance. This technique usually
requires the forward field lobe (normally containing the saucer
section) also to be offset from the nacelle vector. In many older
ships the nacelles were located slightly above the forward lobe. The
NX and Constitution-class starships used this design, which yielded superior field stability, although it also resulted in reduced
propulsive efficiency.
During the 2260s, the Advanced Starship Design Bureau began to
experiment with field geometries that lowered the nacelle vector with
respect to the forward field lobe. This approach promised improved
engine performance but required several years of research into new
field-stability software. Among the first vehicles to employ the new
approach was the experimental Starship Excelsior, whose design
lowered the nacelle centerline so it was level with the saucer module.
This design was reflected in the Excelsior-class Enterprise-B.
Further advances in field control software allowed even more radical
designs for the Ambassador-class Enterprise-C, and the
Galaxy-class Enterprise-D, both of which saw the nacelles move even lower than the frontal lobe.
Strangely enough, recent advances in deflector field technology have
resulted in a reversal of this trend in nacelle position in some of
the latest ships. New ultra high frequency shield generators have
allowed the Sovereign-class Enterprise-E to employ higher nacelle
positions, while enjoying an additional 3 per cent in engine
performance.
The arcane engineering of warp field geometry continues to be a
subject of intense study at Starfleet's Advanced Starship Design
Bureau and will undoubtedly continue to be an area of ever-changing
research and innovation.