Please use this product at your own risk and always wear eye and ear protection!
Do not pressurise this engine without carrying out safe pressure tests. 3D print qualities vary and will not guarantee that the bottle cap/cylinder head can cope with high pressures.

Build video:
https://www.youtube.com/watch?v=YLPY8CY5Fm4

As I mention in the video, I am working on the lid mount cylinder head for this engine, so stay tuned for that!

Print settings:
Nozzle diameter - 0.2mm
Print width - 0.25mm
Layer height - 0.1mm
Top/Bottom layers - 6
Outer walls - 6
Infill - 50%
Infill type - Rectilinear
Material - PLA
Print speed - 50mm/s
Nozzle Temperature - 220c
Bed temperature - 40c

*These settings are required for this print. The other settings can be changed depending on your printer/filament.

All parts are oriented in the correct print direction and the following parts require support:

• Crankcase
• Cylinder
• Piston

Hardware required:

• 6pcs M2x10 Bolt
• 1pc M2x20 Bolt
• 1pc M3x25 Bolt
• 1pc 608 ceramic hybrid bearing
• 1pc Plastic bottle
• 1pc Presta valve (for tubeless tyres)
• 2pcs Pneumatic fittings (https://goo.gl/5mCG8a)
• 1pc Propeller (at least 8 inch in diameter)
• 1pc Rubber O-ring OD 8mm Cross section 2mm
• 1pc 6mm BB pellet
• Brass tube ID 2mm OD 3mm (only need 6mm length)
• PVC clear tube ID 4mm OD 6mm
• 0.5mm thick rubber sheet
• 2.5mm thick rubber sheet
• Bike pump or compressor

Tools/other building equipment:

• CA glue (superglue)
• Silicone spray lubricant (WD40 sell some with a yellow cap)
• 1200 grit wet/dry sand paper
• Scissors
• Vice or clamp
• 1.5mm Hex driver
• 2mm Hex driver
• Drill & 6mm drill bit