Light Science for Leisure Hours: A series of familiar essays on scientific subjects, natural phenomena, &c.Proctor, Richard A. (Richard Anthony)
Science
Light Science for Leisure Hours: A series of familiar essays on scientific subjects, natural phenomena, &c.
Proctor, Richard A. (Richard Anthony)
Science
reached an upright position, the arms have already reached the chest,
and the stroke is finished. Thus the Oxford stroke takes a perceptibly
shorter time than the Cambridge stroke; it is also, necessarily,
somewhat shorter in the water. One would, therefore, say it must be
less effective. Especially would an unpractised observer form this
opinion, because the Oxford stroke seems to be much shorter in range
than it is in reality. _There_ we have the secret of its efficiency.
It is actually as long as the Cambridge stroke, but is taken in a
perceptibly shorter time. What does this mean but that the oar is taken
more sharply, and, therefore, much more effectively, through the water?
Much more effectively so far as the actual conditions of the contest
are concerned. The modern racing outrigger requires a sharp impulse,
because it will take almost any speed we can apply to it. It will
also retain that speed between the strokes, a consideration of great
importance. The old-fashioned racing-eights required to be continually
under propulsion. The lightning-feather was a necessity in their
case, for between every stroke the boat would lag terribly with a
slow-feathering crew. I do not say, of course, that the speed of a
light outrigged craft does not diminish between the strokes. Anyone who
has watched a closely contested bumping-race, and noticed the way in
which the sharply cut bow of the pursuing boat draws up to the rudder
of the other as by a succession of impulses, although either boat seen
alone would seem to sweep on with almost uniform speed, will know that
the motion of the lightest boat is not strictly uniform. But there is
an immense difference between the almost imperceptible loss of way of a
modern eight and the dead ‘lag’ in the old-fashioned craft. And hence
we get the following important consideration. Whereas with the old
boats it was useless for a crew to attempt to give a very quick motion
to their boat by a sharp, sudden ‘lift,’ this plan is calculated to be,
of all others, the most effective with the modern racing-eight.
Public-domain text, read in full here on John Shaqi.
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