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Armored Helicopter Flame-Licker Vacuum Engine Model is a single-cylinder flame-licker/vacuum engine arranged as an armored helicopter display whose to..

Armored Helicopter Vacuum Stirling Engine Model is a helicopter-form single-cylinder vacuum engine whose four-blade rotor turns as the externally heat..

Stirling Vacuum Tractor Engine Model is a metal tractor-shaped external-heat model combining a large flywheel, exposed linkage and rolling chassis for..

Vacuum Flame-Licker Engine Model with Wood Base is a compact atmospheric engine that admits flame-heated air and uses the resulting pressure differenc..