This broaching action scored the wall of the hole and left its diameter slightly oversize so the bush was not an interference fit anywhere except at its flared end.
12.
Tunnels are especially expensive because they must be drilled large and with flared ends, like a trumpet, to dissipate shock waves produced by a train traveling at such high speeds.
13.
The length and weight of " thunchen " make it extremely unwieldy; so the flared end is rested on the ground or a special stand, or is supported on the shoulders of another monk.
14.
In fact, the flared end of a brass instrument is not to make the instrument sound louder, but to correct for tube length end effects that would otherwise make the overtones significantly different from integer harmonics.
