TITLE:
Rotating Translating Cones
AUTHORS:
Kern E. Kenyon
KEYWORDS:
Rotating Cones, Translate in Fluids, Blunt End First
JOURNAL NAME:
Natural Science,
Vol.13 No.4,
April
13,
2021
ABSTRACT: A
first attempt has been made to confirm experimentally a theoretical concept,
recently published, involving a rigid cone rotating about its long axis under
still water: it should tend to translate along that axis blunt end leading and
apex trailing. Two identical hollow cones, neutrally buoyant, with equal
weights attached to the apexes, were released simultaneously at the surface of
a swimming pool. One cone had a thin light weight spiral vane vertically
attached to the cone’s outside surface in order to cause it to rotate as it
sank. Several trial runs were made in the shallow and deep ends of the pool,
and in every case, the non-rotating cone without a vane hit the bottom of the
pool first. These comparisons qualitatively and indirectly validate the
prediction.