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Thermoacoustic burner drum: one torch heats one or three vertical 2 in tubes
How do I heat the middle of a vertical tri-clamp tube with a propane torch? · Hardware · basis: Hole and tube positions from the engine layouts in tools/gen_ta_power.py; Ø66 holes pass over a 2 in ferrule (Ø64)
Long Earth Society build part. The drums that put one torch's heat into my generators. 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
- 2 in table
Notes
- A closed drum split across its height: the lower half carries a Ø40 flue straight down to a torch standing on the bench (the hot gas rises up it), the upper half the vents. The tubes pass through Ø66 holes, so each half slides over a 2 in ferrule; the halves join with three M4 × 20 through their tabs.
- Ring engine: one drum Ø256 round all three cores' hot zones, flue at the centre between them. Twin engine: a Ø130 drum with its flue in front of the core.
- Inside height 40: room for the optional fin sleeves. The annulus round each tube at the holes is a designed gap (3.6 mm).
- It runs at flame temperature; what it is made of is the builder's choice.
Sizes
| file | diameter_mm | flue_mm |
|---|---|---|
| drum-ring-lower | 256.0 | 480.1 |
| drum-single-lower | 130.0 | 403.8 |
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 |
|---|---|---|---|---|
| tube holes | Ø66 | 2 in tube Ø50.8 (7.6 annulus, passes a Ø64 ferrule) | designed | all |
| tab holes | Ø4.5 | M4 clearance (ISO 273 medium) | designed | all |
| flue | Ø40 / Ø35 | torch flame (no contact) | designed | drum-ring-lower* |
| flue | Ø40 / Ø35 | torch flame (no contact) | designed | drum-single-lower* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Xem Studio | tools/gen_ta_power.py: the network model and every dimension on this page | code | CC BY 4.0 |
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 4 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| drum-ring-lower | ring drum lower half: Ø256 × 22.5, walls 2.5, three Ø66 tube holes on r 80, Ø40 / Ø35 flue 480.1 down from the centre, 3 tabs | STEP · STL |
| drum-ring-upper | ring drum upper half: three Ø66 tube holes, 8 × Ø8 and Ø12 vents over the centre, 3 tabs | STEP · STL |
| drum-single-lower | single drum lower half: Ø130 centred 22 in front of the tube, Ø66 tube hole, flue 403.8 down at y 64 | STEP · STL |
| drum-single-upper | single drum upper half: tube hole, vents over the flue | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=thermoacoustic-burner-drum
How it fits
In these build lists
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Questions
Why a flue down to the bench?
The hot zones are half way up the cores, above the pistons; the flue brings the flame there while the torch stands safely on the bench.