Measured geometry of real objects.
1,568 free STEP/STL files across 165 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











































































































Nothing matches. Ask for it; requests set the scan order.
Build list: Beta Stirling, rhombic drive, 2 in tri-clamp20 lineslistBuild list: Free-piston Stirling, 2 in tri-clamp (flexure-suspended)19 lineslistBuild list: Gamma Stirling, 2 in tri-clamp28 lineslistBuild list: LTD coffee-cup engine10 lineslistBuild list: Soda-can gamma19 lineslistBuild list: Thermoacoustic standing-wave engine, 2 in spools11 lineslistNASA and Sunpower free-piston Stirling references (public domain) and design numbers5 lineslistStirling engine configurations: which type needs which parts on this shelf14 lineslist