2 replies to this topic

[Gary]

Hi,

H3, a mixture of potassium chlorate and charcoal, is sometimes used as a burst composition in star-shells.
Ordinary 75:15:10 blackpowder is also used as a burst composition, but it is supposedly less powerful than H3 or a potassium perchlorate composition.
Is it possible to make a 'hybrid' burst composition, consisting of H3 (potassium chlorate/charcoal) intimately mixed with SULPHURLESS blackpowder (potassium nitrate/charcoal, but without the sulphur)?
Of course, the ratios of potassium nitrate and charcoal would need to be adjusted to compensate for the absence of sulphur. Or, perhaps sugar or dextrin could be added to replace the sulphur?
I have no potassium perchlorate at the moment.

[paul]

Of course this is possible but I don´t see the use of it... Good black powder is powerful enough to break larger shells and H3 or KP is used for smaller shells.
You can always add a tiny bit of 7/3 flash to your shell as a booster of you don´t want to use H3 (which should be avoided anyway).

[spanner]

Quote

[Is it possible to make a 'hybrid' burst composition, consisting of H3 (potassium chlorate/charcoal) intimately mixed with SULPHURLESS blackpowder (potassium nitrate/charcoal, but without the sulphur)?

Try this:

KNO3- 8 parts/ 38%
KClO3- 7 parts/ 33.5%
C- 6 parts/ 28.5%

This combines the two comps about equally.