Z-37 Čmelák – 3D Printable RC Aircraft with functional crop dusting system

A lightweight 3D printable RC model of the legendary Czech agricultural aircraft Z-37 Čmelák.

This model was designed with emphasis on:

• realistic flying characteristics

• easy transport and assembly

• low weight construction

• compatibility with common hobby electronics and 3D printers

The aircraft has been personally designed, printed, assembled and flight-tested before release.

The project combines classic utility aircraft aesthetics with modern lightweight 3D printing techniques. Most parts are optimized for standard FDM printers and require minimal additional hardware.

Features

• Lightweight printable airframe

• Functional hopper with payload release system

• Large stable wing for relaxed flying

• Easy access to electronics

• Optimized for PLA / LW-PLA combinations

Detailed step-by-step assembly manual included

Recommended setup

Wingspan: approx. 1510 mm
Motor: 3548 outrunner class
Battery: 3-4S LiPo
Servos: standard 9g class
Printing material: PLA / LW-PLA
Printing material: PLA / LW-PLA

The model was primarily developed using Bambu Lab printers, but should be compatible with most modern FDM machines with adequate build volume of around 250x250x250mm.

Important

This is not a beginner RC aircraft. Basic experience with RC flying, model assembly and 3D printing is recommended.

If you build one, feel free to share your makes and modifications.

Happy flying! ✈

3D printing settings

Recommended nozzle: 0.4 mm
Layer height: 0.2- 0.22 mm
Wall count: 1–3 depending on the part
Infill: 0–5%

Recommended materials:

PLA for structural/high-load parts
LW-PLA for lightweight fuselage and tail sections
Supports: only where indicated
Brim recommended for larger thin-wall parts