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Frame for the rolling-diaphragm tri-clamp engines: base, wall, hanger and torch-stand mount
What frame holds a 2 in tri-clamp engine over a torch? · Hardware · basis: Design values; hanger bar hole spacing (78.8) and height from the spool hanger collars on this site; torch-stand hole pattern from the torch stand on this site
Long Earth Society build part. The stand under my rolling-diaphragm engines. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 5 in table
Notes
- One frame for all three rolling-diaphragm engines: the 2 in cup hangs from a spool hanger bolted to the wall, its closed end 40 mm over the torch stand's ring.
- The wall has a window behind the hot end and the optional finned cooler, so the fins clear it and the flame has air.
- The base reaches 300 mm toward +X, under the power head and flywheel on the tee's branch.
Sizes
| feature | value_mm |
|---|---|
| base | 370 × 150 × 8 |
| wall | 124 × 10, top z 234.85 |
| hanger holes | x ±39.4, z 226.85 |
| torch stand holes | (±25, 28), M4 |
| cup bottom | 93.0 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| hanger-bar holes | 2 × Ø5.5 | M5 screws | designed | all |
| torch-stand holes | 2 × Ø3.3 | M4 tap drill | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| rd-frame-2in | frame: base 370 × 150 × 8 (x −70..300, y −95..55), wall x ±62, y -49.4..-39.4 to z 234.85 with a window x ±30 from z 93 to 217.85, 2 × Ø5.5 at x ±39.4, z 226.85 for the hanger bar, two gussets, 2 × M4 tapped (Ø3.3) at (±25, 28) for the torch stand | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-rd-engine-frame
How it fits
In these build lists
Tri-clamp rolling-diaphragm beta, 2 inA torch-heated beta in two pieces of pressure vessel: a 2 in × 150 cup with the …Tri-clamp rolling-diaphragm Ringbom, 2 inThe simplest mechanism I could draw: one crank, one con-rod, and a free displace…Tri-clamp rolling-diaphragm gamma, 2 inThe Ringbom's cup, tee and power head with the displacer on the crank: a pushrod…You might also need
Questions
Which engines use it?
The rolling-diaphragm beta, Ringbom and gamma: they share the cup, the hanger height and the torch position.