Si Chuan Fei Shi (四川飛石)

Drawing of a Si Chuan Fei Shi, from 'Zhan Shou Quan Shu (《戰守全書》)'.

Si Chuan Fei Shi (四川飛石, lit. 'Sichuanese flying stone') was a type of lightweight, two-man operated traction trebuchet. True to its namesake, the trebuchet was commonly found in Sichuan, although it was also manufactured in Beijing during the twilight years of the Ming Dynasty.

Unlike other Chinese trebuchets, Si Chuan Fei Shi had a A-shaped arm mounted on a single pole, which allowed it to be propped on narrow places and pivot easily. This was presumably an adaptation to the mountainous, narrow and uneven terrain of western Sichuan, where many Tusi mountain fortresses stand.

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Tai Ping Che (太平車)

Drawing of a Tai Ping Che (above) and its various componnets (below), from 'Zhan Shou Quan Shu (《戰守全書》)'.

Tai Ping Che (太平車, lit. 'Peaceful cart') was a unique siege defence weapon used by the Ming army. Despite the name, it was not actually a war cart, and anything but peaceful.

Tai Ping Che was actually a semi-cylindrical mobile gun turret armed with five small cannons. Equipped with two wheels, it could be easily raised or lowered down the wall with the help of a wall-mounted crane, which allowed the turret to fend off besieging troops, particularly sappers, hiding in the hard-to-reach "dead zone" of the fortress. Since it would be nearly suicidal to man the turret with gunners and send them outside the wall, Tai Ping Che was also equipped with a Gang Lun Fa Huo (鋼輪發火) so that its five guns could be fired remotely.

The gun turret can be considered a successor of Warring States period Mohist Xian Pi (縣脾, lit. 'Hanging spleen').

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Ye Meng Xiong's Qing Che (輕車)

Drawing of Ye Meng Xiong's Qing Che, from 'Deng Tan Bi Jiu (《登壇必究》)'.

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