Design Concept This intricately detailed scale model of the Trent 900 Turbofan engine captures the essence of a marvel in aviation engineering. Designed to highlight the internal mechanisms, it's both an artistic and educational representation intended for aviation enthusiasts. ## Purpose Ideal for educational purposes or as a decorative piece for those passionate about aviation and engineering. It illustrates both the functionality and beauty of modern jet engines. ## Printing Suggestions When printing, ensure high resolution and precision to capture the intricate details of the engine components. It's recommended to print with high-quality PLA or ABS to achieve a sturdy and detailed outcome. ## Assembly Instructions The model is composed of multiple interconnected components, requiring careful attention during assembly. Follow the detailed numbered instructions provided to accurately piece together the engine parts.

This is an advanced build consisting of over 100 individually printed parts. All components, except for bearings and screws, can be 3D printed. Expect around 1-2 weeks of printing followed by ~8-12 hours of assembly.

This model is not For beginners! but worth giving a shot!

1. Accurately represents the Trent 900’s 3-spool architecture:1-stage Fan (LPC)
6-stage Intermediate-Pressure Compressor (IPC)
8-stage High-Pressure Compressor (HPC)
Single-stage High-Pressure Turbine (HPT)
Single-stage Intermediate-Pressure Turbine (IPT)
6-stage Low-Pressure Turbine (LPT)
Fully motorised rotating shafts and gearsLimitation: unrealistic rotation of spools. (Only HP section rotates counter-clockwise)
TPU Nose coneSimulates the flexible rubber nose cone found on real Rolls-Royce engines to prevent ice formation can be printed with pla also!

2. Blades – Rotating components
Vanes – Stationary components
Casing – The outer shell of the engine
3-Spool Jet Engine Sequence (Front to Back): Fan / LPC → IPC → HPC → Combustor → HPT → IPT → LPT

Parts have been grouped by assembly order and function/color for intuitive building.

Component
Material (Recommended)
Fan Blades
PLA Silk+ Titan Grey
Fan Blade Body
PLA Metal Iron Grey
Vanes
PLA Grey
Casing
PLA Silk+ Silver
High-Temp Region
PLA Silk+ Rose Gold
Nozzle
PLA Metal Iridium Gold
Spinner
PLA Black & White
Nose Cone
TPU Black
Stand
PLA Silk+ Blue
Inner Gears & Shaft
PETG Black

Gears and shafts have increased wall count for strength.
Colored and gear components are consolidated for faster batch printing

4. Use 3MF file settings to retain all print optimizations (do not export to STL)

XY Hole and Contour Compensation have been pre-applied.
Titan Grey Silk+: Prints look similar at 30mm/s and 50mm/s. Prefer faster speeds where possible.
Fan Blades: Slowed print speed to reduce wobble.
Spinner: Print with finer layer height for better finish.
All Other Parts: Standard 0.15 mm layer height (0.2 mm works fine as well).

5. Assembly requires time, patience, and proper tools. Refer to the PDF guide by Nejc Terbuc, which is included in the files (modified slightly by myself).
Tools Recommended:
Screwdrivers, super glue, needle-nose pliers, pliers (support removal), blowtorch (for loose stringing), 0.8 mm drill bit (for hole cleaning), Hairdryer (for spinner fitting)
Refer closely to the following images to build the following five parts individually, before final assembly:
Fan / LPC
IPC
HPC + Combustor + HPT
Turbine (IPT + LPT)
Stand

6. Warping – The Fan casing and blades can experience warping that will affect tolerances. Print with mouse-ears or full brim (pre-applied), increase if necessary.
Assembly with M1 screws – Assemble the components in a way that allows the screwdriver to sit perpendicular to the screw axis. Do not use excessive force, as this may strip the screw.
IPC and HPC sections can be joined with blue-tac — strong enough for torque transfer, while allowing disassembly.

Spinner – Fit heated stripe using hairdryer, then glue into place (similar to 2-spool jet engine model by Chris Shakal)
Lubricants – Apply silicon grease to surfaces in contact with moving parts.
Power – Use 45W laptop chargers / fast chargers to power the model to greater effect.
Bearings – Some bearings (marked in the PDF) can be excluded to save cost, especially for static display models.
Bill of Materials – External materials can be purchased via Aliexpress or Amazon . Keep in mind not all bearings are absolutely necessary, and screws can always be replaced with glue (although I highly recommend using M2.5x10 wood screws).

Working Turbo Fan Jet Engine Scale model! Not For Beginners!

0.15mm layer, 3 walls, 15% infill