Very small device, 3.5 mm ID, 50 mm long. Nozzleless, core burning with 40 mm deep cavity, 2 mm diameter.
The driver was taped to a cardboard scrap, which was folded up on one end to make a counter-balance. The pivot was drilled at the centre of mass. Composition was the Iron wheel driver composition.
Nice effect, short burn.
The device contained only 285 cubic mm of composition, in core-burning configuration it is no suprise it was consumed in about 2 seconds.
The burning surface area started at 319 square mm, which suggests a 20 mm ID tube in end-burning mode with a similar nozzle diameter could be tried for a longer burning driver. That seems intutitively far too large, so I'll try an intermediate device first.
As you can see from the pictures, the case was largely consumed in the post-burn smoldering. It stood up to the burn quite well, but a thicker case will be needed for a choked device.
| title | type | size |
|---|---|---|
| Burn Video | video/x-msvideo | 539.700 kbytes |
| Pre-Test Picture | image/jpeg | 32.383 kbytes |
| Post-Mortem Picture | image/jpeg | 65.615 kbytes |