|Drawing of a Che Lun Pao, from 'Wu Bei Zhi (《武備志》)'.|
As with many rapid-firing weapons of this period, Che Lun Pao isn't terribly practical on the battlefield. It is simply too unreliable to justify the high cost of producing so many iron barrels.
Incidentally, similar designs were attempted in Europe in the early sixteenth century, with predictable results.
|A rotating gun platform, from 'Vier Bücher der Rytterschafft' by Vegetius Renatus Flavius.|