A hush kit is an aerodynamic device used to help reduce the noise produced by older aircraft jet engines. The most common form of hush kit is a multi-lobe exhaust mixer. This device is fitted to the rear of the engine and mixes the jet core's exhaust gases with the surrounding air and a small amount of available bypass air. Modern high-bypass turbofan engines build on this principle by utilizing available bypass air to envelop the jet-core exhaust at the rear of the engine, reducing noise.

• Model code: 251U2 Update kit 727-100 Stage 3 Hush kit*
• Version: magnetic mounting**
• Revision: original (2025-09-22)
• Scale: 1/100
• Engines: JT8D series
• Parts quantity: 14 (+ 6 magnets 2x2 if need)
• 3D print complexity: 3/5

• Assembly complexity: 3/5

• *251U2 Update kit 727-100 Stage 3 Hush kit is compatible with 1/100 scale model kits 727-100 down/up: 25101 and 25102

**allow you to assemble/disassemble the models for easy transportation and storage. However, you can assemble this model without using magnets, for this you need to glue the appropriate parts

The model requires gluing. 3D Printing Guidelines and Assembly Instructions are included.

Importantly! The model is divided into parts that are oriented for easy printing. Solid model not included in this kit.

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3D printing settings

The model is optimized for a 0.4 mm nozzle and 0.15 mm layers. Approximate ⌀1.75 mm filament length for one set - 5 meters. Parts were tested on Qidi Q1 Pro. The manual includes information about supports and printing recommendations.

Files format: .stl Providing files in other formats must be discussed separately.