The Epic River Journey - Towing
a B-17 Down the Ashuanipi River
While raising the
aircraft was completed successfully, the
project was not yet finished as we still had to move the aircraft to
the site where
it could be remove from the water, disassembled and trucked to Labrador
City. A
host of factors require attention, evaluation and resolution in order
to plan
and accomplish the tow successfully.
The Tow
The tow is the fuselage
and wing structure of a B-17. The
length of the fuselage is approximately 34 feet while the wingspan is
over 90
feet without the wingtips. The weight of the aircraft in that
configuration is
about 19,000 pounds, but with an unknown amount of river silt inside
the
structure and some water remaining in the fuel tanks we were actually
working
with 26,000 to 30,000 pounds, or 15 tons. With the exact weight and
distribution unknown, the center of gravity and buoyancy on the lift
bags had to
be determined in the field. Final placement of the lift bags for
floatation
resulted in an asymmetrical configuration that produced unusual towing
and drag
characteristics. Securing of the
towline to the aircraft structure had to be carefully selected in order
not to
cause damage to the valuable structure of the wing spars.
The River
For many of us there is
a very subtle difference between
lakes and rivers in the waterways of Labrador. Our course starts in the
area of
the Ashuanipi River that has been named “Bomber Run” and then follows
the river
down into Birch Lake, back into the Ashuanipi River and then into the
Smallwood
Reservoir.
The
course looks like a large number of “Z”s and “W”s
strung together and there is limited information on the shoals and
currents. During
the time of the expedition the water level was unusually high that
resulted in
good depth of water at several points where our passage could possibly
be
blocked. The heighten water level also covered many familiar shorelines
and
created new dangerous shoals to be avoided. We
required a river guide with an expert knowledge of the
intricacies of
our passage and the affects of the currents and weather.
Weather
The weather window of
opportunity to recover the aircraft
is very small in this part of the country. Bob and Mark had originally
planned
to make reconnaissance dives on the aircraft in mid-July, but had to
forgo them
because the river was still covered with ice. Cold weather, storms that
would
bring ice and snow start early in September, leaving August as the only
month
the recovery could be possibly done. Strong winds build quickly and
wind waves
easily develop to three and four feet and even higher. While several of
the
guide boats are capable of navigating the passage in those kinds of
conditions,
attempting to tow the aircraft would be foolhardy and impossible.
Boats
A Seattle area
newspaper reporter wrote in one article
that once we had the plane recovered from the bottom we would use three
tugboats
to tow the aircraft. One normally considers tugboats to be large diesel
engines
with a hull wrapped around them ranging from 60 to 150 feet in length
and
capable of 1,000 to 10,000-horse power. There are no such craft
available in
Labrador and even if there were, they would require deeper water than
is
available in the Ashuanipi River. We had to be able to work with the
vessels
available, vessels of opportunity as they are often referred to.
The Silver Dolphin
would be our prime mover. It is a
custom guide boat, 28 feet in length, 8 feet in beam and powered by two
200 hp
outboard motors. It is not designed for towing and we had to improvise
towing
bitts by lashing two 2 x 8 planks to the after rail. This placed the
tow point
only inches in front of the pivot for the outboards, reducing our
ability to
steer almost nothing.
We would be relying on
the other two boats, small
fiberglass pleasure craft, 16 and 18 feet in length with
inboard/outboard
engines of 125 and 175 hp to help us maneuver the tow.
The boats were provided
by Northern Lights Lodge, the same
outfitter that provided our campsite and site support in the field.
Fuel would
be cached for us at Northern Lights Lodge, approximately midway between
“Bomber
Run” and Lobstick.
Crew
Our boat crews
consisted of experienced guides that were
intimately familiar with the river and were also skilled waterman.
Rick Burt would run the
Silver Dolphin and be our river
pilot. Tony Stead, Sandy Ryan and Lee
Cutler would crew the other two boats.
Mark Allen, having
broad experience with tugs, barges and
towing, would be the tow master. However, as Mark explained to the
team: “This
has never been done before. We are working with an unusual tow in
unusual
circumstances. The learning curve will be steep for everyone and
everyone will
need to be patient and ready to help solve the challenges ahead.”
The dive team was split
up amongst the boats and aircraft;
Zak and Gordy would be in the assist boats, Mark would be on the
towboat and
John would ride the B-17. Hamilton Halford would also ride the B-17
while Don,
Joey and Roy would be aboard the boat. Gary Shaw Senior and Junior
would follow
along in the aluminum fishing boats to provide additional assistance as
necessary.
Salvage
gear that might be needed during the trip was split up among the craft. One of the air compressors was placed aboard
the aircraft so that the lift bags could be refilled as necessary. A
kedge and
Danforth anchor were also rigged to the plane and ready for immediate
use if
necessary.
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