Library › Assembled engines ·

Tri-clamp horizontal gamma generator, 2 in, chargeable

The classic desk Stirling generator in tri-clamp, built for power: a horizontal closed hot spool over the burner, a bored and honed power spool beside it, both rods to one ball-bearing crank on a pair of posts with a Ø200 flywheel, and a gimbal-motor generator belted off the crank.

Displacer Ø40 × 30 (37.7 mL) · piston Ø48 × 36 (65.1 mL) · 90° · dead 84.5 mL (swept/dead 0.77) · hot wall 500 °C, water-cooled · model shaft power: air 1 atm 2–4 W at 600 rpm; charged 5 bar gauge: air 5–29 W at 600 rpm, helium 13–61 W at 1200 rpm · 2208 generator 6 : 1 by belt: 0.0–3.6 W at 26–28 V at 1 atm

Exact dimensions. Every part is drawn at true size with no printing tolerance; each part's page lists its mating features and the fit each joint needs, so open those by your process's clearance before making the parts.

Long Earth Society build part. Complete parts list. The engines

65 parts, every one a file here · all STL URLs · Markdown · tick lines as you go (saved in this browser)

Assembled engine

A horizontal two-cylinder gamma Stirling generator in 2 in tri-clamp: a closed hot spool over a torch in a shroud and a bored power spool beside it, joined by transfer caps and a short tube, both rods to one ball-bearing crank on two uprights with a Ø200 flywheel and a belt-driven gimbal-motor generator, on one base; about 800 × 250 × 238 mm.

Assembly STEP (9.9 MB) · STL (11.6 MB) · 135 parts

Build order

1. Frame on the bench; torch stand and shroud on the base.
2. Hot end: screen stack on the liner's neck; press the liner into the hot spool until its feet touch the floor. Fin sleeve over the closed end; jacket halves round the cold end.
3. Displacer: cap into the shell; rod into the cap with its M6 lock nut; slide it into the liner, rod out of the face.
4. Transfer cap (rod version) over the rod, gasket and clamp on the hot spool; bushings in its gland. Hot spool on its cradle.
5. Power side: gasket, blind transfer cap, gasket and clamp to the bored spool with the piston and rod in it; bounce spool, gland cap with its bushings, hangers on the pedestals. Join the two transfer bosses with the 1/2 NPT fittings and the tube.
6. Crank: pins and shafts pressed into the webs (90° apart), con-rods with their bearings on the pins, bearings into the uprights, collars, flywheel with its nuts, crank pulley. Yokes on the rods with their lock nuts, wrist pins, con-rods, collars.
7. Generator: pulley on the motor's rotor top (4 × M2), motor on the bracket (4 × M3 countersunk), belt on both pulleys.
8. Ports: water hoses to the jacket spigots; gauge, relief, fill and plug on the transfer caps; fill, gauge, relief on the bounce spool.

Agents: each row's object has /api/geometry?object=slug and the MCP tool get_free_files; the STL list above is every part.

JSON: /api/geometry?object=list-tri-clamp-horizontal-gamma