| |
Shells and Barges
M.I.T., having started its rowing tradition
almost a century after the sport had become
well established in England, was spared some
of the ordeals that accompanied the development
of the early craft though it has played an
important roll in the continuing development
in the past half century. While every class
of water craft of whatever purpose has gone
through its own particular transitions for
specific reasons ever since man ventured away
from dry land.
It was not until the watermen of the English
harbors made changes with speed strictly in
mind, in order to improve the profit from
their labors, that competition became the
proving ground for those changes. Whatever
the first craft in this category may have
been, the first racing shell as such was the
lapstrake boats used by preparatory school
and college crews in England in the very early
1800's. Narrower than work boats but not yet
narrow enough to require outriggers to provide
leverage, thwarts for the seating of rowers
and long enough for the desired number of
oars. In the narrow and winding streams of
England, which became the rowing waters of
the sporting element, it was soon found advisable
to have a man in the bow to give directions
but soon this duty was given to the man in
the stern whose duty it was to steer. Eventually
a true racing craft came into being, suitable
for its day but far from the current sophistication.
The reduction of width and depth ratios brought
about outriggers. The short chop of a work
boat changed to keeping the oars in the water
longer and more space between rowers was required.
Moving the weight of a heavy hull slowed the
craft so materials were lightened and unneeded
parts eliminated. To permit a longer stroke
with the oar in the water under pressure longer
the fixed thwart was changed to a longitudinal
concaved board on which an oarsman sat with
a copious application of grease to permit
easy sliding of his leather-seated britches
(sliding seat was a later American invention).
Despite the British penchant for holding on
to whatever has become traditional, the influence
of competition brought continuing refinements
which will never come to an end.
Whether before after the slenderizing of
boats that required the use of outriggers,
the weight of wood and fastenings in the hull
became an obvious target for change. England
had long since lost its home source of suitable
soft woods before American materials and ingenuity
had appeared and the first truly light weight
shell was made of Papier-MachŽ, a composite
of layers of paper solidified by saturation
with a glue/varnish fluid which provided both
lightness and smoothness but which suffered
from lack of rigidity and weakening further
by moisture absorption. This led quickly to
use of thin pine and cedar as a skin fastened
over a framework of pine and oak, which was
the state of the art when Tech entered the
rowing world.
This provided improved lightness and smoothness
which, with a well applied light varnish and
rubbed down with pumice did greatly enhance
speed. An accompanying disadvantage of this
construction was its vulnerability to checks
or cracks brought about by hitting debris
in the water (all rowing waters were also
depositories for city garbage as well as construction
or destruction scrap), as well as strains
resulting from the forces applied to out riggers
to maintain lateral stability. Leakage could
prevented only by adding more varnish and
internal patches, with resulting increase
in weight and tendency for varnish and patches,
with resulting increase in weight and tendency
for varnish buildup to blister in warm sunlight.
The first improvement over varnish cedar
was the application of a very fine weave fiberglass
cloth impregnated with a hard resin which
greatly reduced the possibility of leakage
by blow or absorption though an increase in
weight had to be acceptable for this security.
After long years of living with the faithful
cedar and varnish shell, the application of
a layer of fiberglass whetted the appetite
for further changes to achieve improvements
in weight, rigidity, strength, fatigue, absorption,
fouling and any other factor that would actually
or theoretically afford greater speed. Proving
that capability is always difficult given
the ambiguous and indeterminate effects of
water conditions, adjustments, combinations
of oarsmen or even state of mind of individuals.
But the hopes and trends were of in all directions
and always will be as long as ingenuity is
a human trait.
Lightness and rigidity being natural targets,
along with any change in shape or alteration
in drag-producing accessories such as rudder
and outriggers, there were no shortages of
places for a start. What at first might appear
to be a good idea could quickly turn out to
be otherwise. M.I.T., as might be expected,
was perhaps a leader or instigator in this
direction. In 1927 Tech received, thanks to
an anonymous donor, its first brand new shell.
Built by Sims of England, to specifications
from Tech, it deviated from the conventional
hull design by having its greatest width at
#3 from where it narrowed all the way to the
rudder. This was intended to carry the greatest
weight and power forward and reduce drag from
there aft while utilizing a lighter stroke
to set the pace. But the "Avery H. Stanton"
(named for the 1924 Manager of Crew) did not
live up its expectations in speed and settled
at the stern regardless of the lightness of
the stroke or of the crew itself and became
an embarrassment as a beautiful new shell
in which no crew wanted to row.
Then about 1930 a group of oarsmen and naval
architecture personnel started a project of
developing plans for a shell using aluminum
alloy skin in place of cedar in combination
with redesign of structural components. This
did not get to the construction stage due
to personnel changes that left the project
in limbo. In the mid 1930's, perhaps with
no connection or stimulus from this adaptation
of metal for skin from the earlier attempt,
the Cambridge Boat Works operated by Cedric
Valentine, who became head crew coach in 1937,
constructed a shell of duralumin which was
reputed to be the lightest eight ever built.
It apparently was fast and compatible but
faded from view and comment and nothing further
regarding it has been discovered.
Again in the 1930's there was built an experimental
shell about which specific knowledge seems
lost and forgotten. That was the inverted
or convex hull, which might be considered
as some sort of cataman. With greater depth
and buoyancy on the sides and arched to the
center it was perhaps intended to be laterally
stable an ride on a cushion of air. As to
provisions for the foot clogs, which need
to be low in the center, and other details
no facts have been discovered, but the idea
proved to be a disaster.
More recent, and more successful than these
abortive attempts, have been the development
of synthetic fibers, plastics, epoxies and
cellular sheets that have brought new possibilities
for lightness and strength that undoubtedly
have been successful and have a long course
ahead before exhaustion. Reinforced plastics
using glass or carbon fibers and sandwich
construction using a honeycomb core have all
but replaced cedar hulls, sometime going beyond
the desired improvement. A limber hull that
can twist and weave can result in all the
boating working against each other trying
to maintain a stable condition for themselves.
And one that is too stiff can send a tremor
throughout the boat from a slight mistake
or deviation and reduce overall performance.
And while there can always be more reduction
in weight, with to without live loads in e
bodies of the oarsmen far above the shell,
a point could conceivably be reached where
some keel weight or ballast might be am improvement.
Situations of that sort have a way of becoming
very evident.
At all crew boathouse now, as at Pierce,
the racks are showing more white hulled Shoenbrods,
gray hulled Vespolis and varnished Pococks
which stand out like pieces of Chippendale
furniture among painted chairs in a kitchen.
It is probably inevitable that cedar shells
will be relegated to the upper racks as sentimental
conversation pieces like classic cars or carriages.
And as a further push in that direction, nature
is no longer allowed to produce cedar of shell
quality or spruce of oar quality. And the
woodworking craftsman is replaced by molded
synthetic technicians, neither of which understands
or masters the expertise of the other.
Those who have had their turn at rowing at
Tech may have particular recollections of
noteworthy shells that could be recorded that
they have more attributes of personality than
other things. Such as the "Cornell Boat"
purchased about 1920 by a Tech alumnus for
$50.00 from Harvard after it had been abandoned
there about 1902 by Cornell as unworthy of
return to Ithaca after a regatta. Or the shell
by the famous Harvard Henley champion of 1914,
acquired about 1922 with a batch of surplus
shells, which became the choice of the varsity
in 1927 after the debacle of the "Stanton".
A fast and comfortable shell though very limber
and needing a crew that worked well together,
it finished a race with Harvard and Pennsylvania
at the end of the 1 3/4 mile course snuggled
in the junction of the Union Boast Club dock,
esplanade wall and Longfellow Bridge pier
in a maelstrom of wind, wave and launch wakes
and splinters previous year by Oxford of Cambridge,
which came equipped with "Mary of Winton"
to provide inspiration for comment and song.
These shells were converted to swivels and
eventually observed in use in 1949 at the
Old Dominion Boat Club at Alexandria, Virginia.
Or the shell that impaled itself on a spear
of wood that acted like a bow rudder and caused
a collision. And the two shells lashed together
and re-rigged to provide a more sophisticated
training barge. |
|