TECHNOLOGY
Johnston
Racing believe that the use of Carbon Fibre in varying weaves
is the superior material to build very stiff and on-weight
racing shells. When cored with Aramid honeycomb, hull and
panel stiffness is World class.
The hulls, decks and canvass of our "Elite"/"EXCALIBUR
by JR" and "EXCALIBUR GOLD by JR" boats are
built with a combination of unidirectional, plain weave and
twill weave carbon fibre. When combined with thick sheets
of honeycomb we can guarantee superior longitudinal and torsional
stiffness. To maximise stiffness, the underdeck bulkheads
are shaped to support the deck laterally and longitudinally.To
ensure our eights are longitudinally stiff we have added a
"vertical web". Under the deck we place a vertical
bulkhead the full length of the cockpit. The triangulation
effect ensures Johnston Racing eights are well within the
recommended stiffness set by FISA. All cored boats are supplied
with sealed bulkheads under the slides. This ensures the boat
floats above the water when swamped, and provides a more boyant
object to hold onto when swamped or capsized. The sealed bulkheads
enable Johnston Racing cored boats to comply with the FISA
flotation rules.
Recently we have
released a fully moulded stern coxed quad scull/four - "EXCALIBUR
by JR, SABRE by JR and CRUSADER by JR". The additional
skin on the gunwales and flange in the cockpit area is designed
to improve the longitudinal stiffness of the hull. Also, the
white gelcoat finish is designed to improve the visual appeal
of the boat, many years after construction.
The "ONE"
series of singles sculls also has a fully moulded cockpit,
canvasses and splashboard to improve hull stiffness and visual
appeal.
All hulls are coupled with aerofoil aluminium wing riggers
which may be attached conventionally with bolts or using camlock
"quick release" technology . Fully adjustable camlock
footstretchers can be attached directly to the rigger rather
than the deck. This enables the balls of the feet to be attached
directly to the blade in two places (through the footstretcher/rigger
and conventionally through the body and oars). That way no
energy is lost through the boat.
All Johnston Racing boats are capable of handling all weather
conditions because of the extra height given by the aerofoil
wing rigger.
Using camlock technology, riggers can be attached and removed
from the boat in a matter of seconds without the use of tools.
Also camlocks are used on footstretchers to simplify and speed
up adjustments - forwards, backwards, steeper, flatter, higher
and lower. It will not be long before we will have developed
a fully adjustable boat that will not require any tools for
making changes to footstretchers, riggers, pins and gates/swivels.
The "tool-less" boat is not far away.
The hull and canvasses of all our boats are prepared with
a marine grade white gel coat, however we can produce boats
in any colour, its your choice!
An independent quality control process ensures all boats are
of the highest quality and consistently finished from boat
to boat before leaving the factory.
If you have any queries regarding any of our boats please
do not hesitate to contact Alastair McLachlan on 0417 881
201 or email at enquiries@johnstonracing.com
Send
mail to enquiries@johnstonracing.com
with questions or comments about this website.
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