Modular 3D Model File Packs for Serious Ship Modelers

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We design 3D model file packs as reusable engineering libraries rather than single-use kits. Our approach is based on modularity, mechanical believability, and long-term value: once added to your digital workshop, these packs can be reused across multiple projects, scales, and eras. Whether you are building a historic sailing ship, a Cold War submarine, or a modern offshore vessel, our file packs are designed to integrate naturally into your workflow and expand what you can create.

You can check them out at our Cults3D page. Or continue reading for more information, renderings and download links to specific accesory packs.

Modular Welin Davit & Ship’s Boats Set

This modular Welin davit and ship’s boats set is designed to add authentic, flexible deck detail to a wide range of ship models. The kit includes a fully modular Welin-style davit and four distinct dinghy types: a covered boat, an open-top boat, a steam-launch–style boat, a Zodiac, and a two-piece Zodiac for easier printing and assembly. To complete the scene, the pack also provides oars, ropes, pins, and dedicated dinghy-supporting wedges, all supplied as separate STL parts.

The standard davit measures approximately 65 mm long, 45 mm tall, and 23 mm wide, with all accompanying parts proportioned to match seamlessly. Thanks to its modular construction, the davit can be assembled in short or extended configurations, allowing builders to adapt it to different ship sizes, deck layouts, and historical contexts. All parts are optimized for clean, reliable printing with minimal supports, and can be scaled up or down easily. By mixing and matching boats and davit components, builders are encouraged to create unique deck arrangements rather than a single fixed configuration—making this set a long-term asset rather than a one-off accessory. <—- Click this link to get them.

Rudders & Dive Planes – Historic to Modern Control Surfaces Pack

This comprehensive STL pack brings together 157 rudders, dive planes, and control components, spanning more than two centuries of maritime and underwater design—from 19th-century historic ships to modern submarines and even Russian-style ekranoplans. The collection includes complete rudders and dive planes with or without control levers, standalone control arms, discs, linkages, and matching shafts and stocks.

Due to the functional nature of marine control surfaces and the evolutionary continuity of naval design, some parts may share similar geometries or proportions. This is intentional and reflects real-world practice. Supplied in multiple scales and easily scalable to any size, these components are ideal for upgrading scratch builds, enhancing existing models, restoring simplified kits, or adding believable mechanical detail to speculative, RC-inspired, or diorama projects. The parts are prepared for support-free printing wherever possible and scale equally well on FDM and resin printers, making this pack a permanent control-surface library for serious builders. <<— Click this link to get them.

Ship & Submarine Propeller Library

This expanded propeller set is a carefully curated collection of ship and submarine propellers designed specifically for 3D printing. The pack includes five modern ship propellers, five early / historic ship propellers with blade counts ranging from two to five, and a dedicated set of modern submarine propellers with blade counts from two to seven.

Each design balances authentic marine geometry with reinforced, print-friendly blade profiles, ensuring the propellers look correct at scale while remaining robust enough for functional or semi-functional use. Optimized for both FDM and resin printing, the set is suitable for static display models, RC conversions, dioramas, kitbashing projects, and engineering visualizations. Delivered as clean, ready-to-print STL files, this pack serves as a flexible propulsion component library across eras and vessel types.

Fully Modular Crane System

This fully modular 3D-printable crane system is designed for ship models, dioramas, and general engineering builds. All major structural components are provided both as full parts and as half-parts, allowing their flat-cut sides to be placed directly on the print bed for cleaner, support-free printing. A full-color 3MF file is included to simplify part identification and orientation during slicing and assembly.

The crane can be configured as a classic single-boom crane, a wide-stance A-Crane, or a rail-mounted deck crane using the included cylindrical pedestal base and printable rail section. Decorative unthreaded bolts are included as STL files, or builders may substitute real M3 or M4 hardware for additional durability. Most holes are sized at 4.25 mm, making scaling and adaptation straightforward. The width of the A-Crane can be adjusted using the supplied 130 mm connecting rods, multiple rods combined together, scaled in the slicer, or replaced with standard 4 mm metal rods or bolts. This open-ended modularity encourages experimentation and custom crane geometries rather than enforcing a single configuration.

Azimuth Propeller System (Experimental Development Pack)

This 3D-printable azimuth propeller system is a modular, experimental propulsion package for builders who want realistic, fully rotating thruster pods. The kit includes 22 separate STL files, along with reference STLs for the required DC motor and steering servo to ensure accurate sizing. At its core is a cylindrical azimuth cradle designed to be screwed and glued into the host hull.

Inside the pod, the propulsion motor is secured using a robust screw-tightened clamp system, while a steering servo rotates the entire pod inside the stationary cradle. The propeller and motor shafts are bearing-supported, and both gear-driven and pulley-driven transmission options are included, allowing propulsion and steering to be configured independently or in combination. Shaft holes in gears and pulleys are intentionally undersized so builders can drill or ream them precisely to match their chosen motors.

The system is fully CAD-simulated but not yet physically printed or water-tested and is therefore offered as an in-development platform at a temporary reduced price. When installed correctly—with the top of the cradle above the waterline—no waterproofing is required beyond sealing the hull penetration. A thin layer of grease between the rotating pod and stationary cradle ensures smooth operation. Builders are encouraged to adapt, reinforce, and experiment, and we actively welcome feedback to guide future improvements. <<– Click here to get the model

Stairs and Railings Pack

This comprehensive stairs and railings accessory pack brings together over 150 reusable deck-detail components collected and refined from our previous ship and submarine models. The set includes more than 100 distinct railing types and over 50 different stair designs, covering a wide range of maritime applications—from compact naval access ladders and enclosed safety rails to open deck stairs and industrial-style handrails. Designed as a universal parts library rather than a single-use kit, these components are ideal for upgrading existing models, supporting scratch builds, or adding believable access and safety details to ships, submarines, offshore structures, and speculative marine projects. Thanks to their modular nature, the parts can be freely mixed, mirrored, and scaled to suit different vessel sizes, eras, and design languages.

All parts are prepared for reliable, clean 3D printing with sensible wall thicknesses and print-friendly geometry. Most rails and stairs can be printed flat on the build plate with minimal or no supports, making the set suitable for standard FDM printers while also scaling well for resin users seeking finer detail. The files are easy to scale to match common ship modeling scales and can be combined, shortened, or extended as needed. This pack is intended as a long-term, reusable accessory library—allowing builders to quickly populate decks with consistent, realistic access details across multiple projects without redesigning or reprinting unique parts each time.

A Shared Philosophy

Across all our file packs, the philosophy is the same: modularity, reusability, and mechanical credibility. These are not disposable STL kits, but building blocks intended to grow with your skills and projects. Combined, they form a flexible digital toolbox for ship and submarine modelers who value realism, engineering logic, and creative freedom. Take a look at all our models at our Cults3d profile.

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