This study investigated why the design of ancient throwing machines evolved from eutitonon (arms outside the mainframe) to palintonon (arms inside the mainframe) from the end of the first century B.C. to the first century A.D. and evaluated the mechanical advantages of the new design. Palintonon was first used for big machines; in the following centuries, it was also used for much smaller machines. Essentially, the palintonon design has several advantages: more elastic energy can be stored in the hair bundles representing the motors of these machines, heavier projectiles can be thrown with the same charging effort, projectiles are stressed by lower acceleration in the machine with the same muzzle velocity, and the throwing machines have higher efficiency. Results are also presented regarding the “internal ballistics” of these ancient throwing machines by using simulation software.
Improvement in Ballistae Design From Eutitonon to Palintonon: A Study on the Mechanical Advantages
Department of Mechanical Engineering for Energetics,
Contributed by the Mechanisms and Robotics Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received October 11, 2012; final manuscript received April 23, 2013; published online June 10, 2013. Assoc. Editor: Hong-Sen Yan.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Rossi, C., and Pagano, S. (June 10, 2013). "Improvement in Ballistae Design From Eutitonon to Palintonon: A Study on the Mechanical Advantages." ASME. J. Mech. Des. August 2013; 135(8): 081006. https://doi.org/10.1115/1.4024371
Download citation file:
- Ris (Zotero)
- Reference Manager