On the last video there was a loud knocking noise coming from somewhere!
On this video hot pistons are modified and test run conducted to see if changes have improved things!
To see other videos of the Mk2 stirling engine:
• Stirling Engine Mk2
If you need to contact me:
shanepomeroy@hotmail.co.uk
Recent mods / changes
- Removed hot pistons and cut off skirt of metal at bottom to try and stop it knocking
-Top of one of the hot pistons chopped off to stop it colliding with the rocker!
Hopes / dreams of test run
- Engine will stop making such a loud metallic noise when running!
Conclusion
- Knocking noise was mostly removed to a more tolerable level!
Next steps
- Install a battery charge analyser so Amps and Volts can be monitored
- Make alternator pulley bigger
- Re-test engine with mods
Thanks for watching
Specification
Power output 472W (0.63 HP) at 600 RPM
Piston to tube clearance cold side 3.5mm
Piston to tube clearance hot side 3.5mm
Hot bulb clearance from inner tube 3.5mm
Cold cylinder outside tube clearance from piston 3.5mm
Hot Cylinder length from bottom of regenerator to bottom of inner tube 274mm
Cold Cylinder length from bottom of regenerator to bottom of inner tube 565mm
Pistons OD 139.7mm OD
Hot bulb heat area inside (measured from bottom of regen housing) 1640 cm2
Cold jacket cold area internal (measured from bottom of regen housing) 2830 cm2
Stroke cold piston 186mm
Stroke hot piston 204.5mm
Fire grate to bottom of hot bulb 198mm
Leather seal (bottom) from bottom of regenerator 275mm
Regenerator height (flow area) 55mm
Regenerator length 216mm
Regenerator width 100mm
Displacement 11.4 litres
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