In his "Gun Book" British author Gough Thomas describes an imperical test he used to define the "balance" of a shotgun, by which he meant a traditional British side by side. He said that the measurements he made included weight, point of static balance, least transverse moment of inertia and radius of gyration.
The purpose of the test was to quantify the amount of effort required to swing the shotgun in question.
He included a photo of the device he used, which appears to be a cradle for holding a shotgun inverted while suspended from above by what appears to be a thin rod or wire.
He offered no explanation as to how this measuring device was used, although there is a stop watch included in the photo, so evidently accurately measuring time is part of the procedure.
Can anyone shed light on what the measurements consisted of, how they were arrived at, and how the figures obtained are to be used?
