Balcony Shoot #24 - Reversing Saxon
Date: 2003-11-03
Description
Simple reversing saxon, each driver 100 mm long, 8 mm ID, 18 mm OD, PVA pasted cereal box cardboard with an overwrap of A4 80 gsm to hold it while drying.
Conical rammed clay end plug to produce the nozzle, each drilled out with a 2.5 mm drill. The ends of each driver were sealed with a little paper wadding and hot-melt glue used to both seal and connect the drivers to the pivot dowel.
A passfire hole was drilled at end of the first driver, and quickmatch connected it to the second driver; A piece of thin blackmatch was glued into each hole with some meal-NC paste, the quickmatch placed and the kraft nosing used to secure it in place.
The first driver was charged with Chrysanthemum #6, the second with my Rocket Propellant. The nozzle holes were placed so as to create a reversing effect, with the dimmer C6 composition burning first, followed by the the might brighter Aluminium effects of the RP composition.
Comments
Nice Effect.
Worked great until the RP driver exploded off the pivot stick. It left paper and glue still stuck to the end, so the case must have delaminated. I haven't found the RP driver case to examine it.
The ends are probably the worst pasted part in the hand-rolled tubes so this kind of failure should probably have been predicted. This device was made from one 200 mm long tube cut in half, cut ends outward, reversing them would probably have prevented it.
Ramming clay end plugs or using a longer glued dowel/plug in the end may have also prevented the failure.
Other than that, the passfire system worked great. No pre-ignition, or failure to ignite. Speedy reversal, looked great transitioning to Aluminium effects. It is a shame the driver over-pressured and ruined it.
Attachments
| title | type | size |
|---|---|---|
| Test Video | video/x-msvideo | 2.511 Mbytes |
| Pre-Test Picture | image/jpeg | 65.336 kbytes |
| Post-Mortem Picture #1 | image/jpeg | 63.021 kbytes |
| Post-Mortem Picture #2 | image/jpeg | 57.940 kbytes |