Introduction By inducing a projectile to spin around its own axis its flight is stabilised and accuracy and range are vastly improved. Rifling a barrel by cutting spiral grooves in a variety of forms and [more…]
Introduction Every month my gun club holds a guest day when members can bring along friends and family to ‘have a go’ with their firearms. Maybe it’s because we were raised on a diet of [more…]
Introduction Although the flintlock ignition system was technically advanced for its time, it wasn’t without its shortcomings. Flintlocks require careful setting-up and constant maintenance and adjustment to be reliable. They also have a relatively slow [more…]
In my introductory article we saw that by the beginning of the 19th century the flintlock was firmly established as the state-of-the-art means of ignition in military and sporting firearms. In this article, we will [more…]
One sometimes gets very interesting results when one turns divergent sums upside down. The Basel problem was asked by Pietro Mengoli in . He asked what is the exact summation of the reciprocals of the [more…]
Some weeks ago, and quite by chance, a friend offered to sell me a rare mid-19th century rifle, the design of which I had long found to be of interest. Although I was not at [more…]
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The Möbius function is denoted by , where is the Greek letter mu. Depending on the factorisation of , the function takes the values . The last says that if is even, then and if [more…]
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