Measured geometry of real objects.
1,505 free STEP/STL files across 160 objects. Dimension sheets free (CC BY 4.0). Generated from the standards; public CAD indexed with its license. Measured scans of devices on the way. How it's made · MCP + API for agents · Pricing







































































































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Build list: Beta Stirling, rhombic drive, 2 in tri-clamp13 lineslistBuild list: Gamma Stirling, 2 in tri-clamp24 lineslistBuild list: LTD coffee-cup engine10 lineslistBuild list: Soda-can gamma17 lineslistBuild list: Thermoacoustic standing-wave engine, 2 in spools10 lineslistNASA and Sunpower free-piston Stirling references (public domain) and design numbers5 lineslistStirling engine configurations: which type needs which parts on this shelf14 lineslist