Gunnery and Ordnance Calibration C017 / 3476
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Gunnery and Ordnance Calibration C017 / 3476
Plate from 18th century encyclopedia showing illustrations of a cannon boring machine together with a bomb caliber compass. The compass was used to calculate the size, weights and trajectories of different munitions. In machining, boring is the process of enlarging a hole that has already been drilled (or cast), by means of a single-point cutting tool (or of a boring head containing several such tools), for example as in boring a gun barrel or an engine cylinder. Boring is used to achieve greater accuracy of the diameter of a hole, and can be used to cut a tapered hole
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9232955
© DAVID PARKER/SCIENCE PHOTO LIBRARY
Bomb Boring Compass Encyclopedia Machining Trajectory Weight Gun Barrel Gunnery Munitions
EDITORS COMMENTS
This print from the 18th-century encyclopedia showcases the intricate world of gunnery and ordnance calibration. The plate exhibits two essential tools of that era - a cannon boring machine and a bomb caliber compass, both instrumental in determining the size, weights, and trajectories of various munitions. The bomb caliber compass steals attention with its remarkable ability to calculate precise measurements for different types of bombs. This ingenious device played a crucial role in ensuring accuracy when launching projectiles, allowing military strategists to gauge their trajectory with utmost precision. Meanwhile, the cannon boring machine stands as a testament to advanced machining techniques employed during that time. By utilizing single-point cutting tools or multiple tools within a boring head, this apparatus enlarged pre-drilled holes such as those found in gun barrels or engine cylinders. The process not only achieved greater diameter accuracy but also enabled craftsmen to create tapered holes if desired. David Parker's stunning capture immortalizes these historical artifacts while shedding light on their significance within the field of weaponry development. As we gaze upon this image from Science Photo Library, we are transported back centuries ago when innovation in gunnery and ordnance calibration paved the way for more accurate warfare tactics.
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