pedestal steerer - L-36 Fleet

aS4bn ENGINEERING AND INSTALLATION GUIDE
MIDSHIP COCKPIT STEERING pi
INTRODUCTION Needless to say, both Port and Starboard can be run the - 11
This guide has been prepared to enable the designer,
builder and boat owner in planning out the various
methods of installing a wire steering system in a mid-ship
same - down or to the side. it is all a matter of taking the
best course for the available space and the location of
suitable attaching structures for the sheaves.
cockpit boat. The Auto-Pilot has been attached to a second quadrant
Edson offers two types of wire rope systems for the midship
cockpit boat, the conventional wire system and the
new Pull-Pull Conduit Steering System, ideal for boats up
to 42' in length. Regardless of the type and size of midmounted
on the aft side of the rudder post and in this case
down low. With the separate quadrant the boat has in effect
two steering systems - one automatic one mechanical.
For further Auto-Pilot information see Auto-Pilot section.
ship cockpit boat, the steering system should be thought
out at the time the boat is designed or at least before the
interior is in place. There are virtually no boats that can not
be adapted to a wire system.
Whichever system used, the advantages of a wire system
are many and important. The system is simple; this makes
it excellent for those boats going off-shore or to remote
areas. A roller chain pulls the rudder to one side or the
other. If the wire fails you can rig a new wire. Try that with
other types of steerers. It is in effect a screw, nut and bolt
philosophy of design.
The steering will give the boat a personality. There is feel,
response, flexibility and if you want to settle down, put on
a dampening brake, add a simple mechanical Auto-Pilot.
These will give you the best of all worlds.
PLANNING FOR THE WIRE ROPE SYSTEM
lllustrations 2 and 3 show the most commonly used
method of runnina - the wire in a mid-ship Cockpit Boat.
The wire is run to either the port or starboard side by using
the Edson Fig. 607 Adjustable Idler. This directs the wire
aft a small amount, down a small amount to double
sheaves that are mounted on the aft engine room bulkhead.
Care must be taken to make sure that the wire is clear of
the - aoorooriate .. sail lockers.
8
The wire is then directed aft at a level just under the bunk
top and on the outside of the backs of the drawers in an
area aenerallv considered to be otherwise unusable. In
manvcases the wire is run alona - the exhaust line trunk.
Aft the two sheaves are mounted on a stiffening bulkhead,
one sheave leads the wire directly to the quadrant, the
other sheave across the boat to a sheave and then back to
the auadrant. Care must be taken to make sure that the
When using wire rope and sheaves, we are dealing with a wires are led correctly to give the boat directional rather
series of straight lines or for the sake of visualization, than reverse steering. This installation points to the imstraight
connecting rods.
lllustration 1 shows two basic methods - we will call them
port and starboard for the sake of simplicity.
Starboard - The wire is led to starboard just under the
deck level, over the heads of those passing through the aft
cabin passage. The wire is then led aft just inside of the
sheer line to a turning sheave which directs the wire into
portance of using existing or planned bulkheads and stifi6;
fening for mounting of the sheaves, easier, stronger, ana,i
,h
simpler.
( 4 11
lllustration 2 the Auto-Pilot steering cables have been -
diverted so the pilot can be mounted on a shelf in the aft
end of the engine room in an otherwise unused but generally
crowded area.
Port - The steering cable goes
engine trunk anddown to a sheav
engine room floor level, then aft
to a sheave and up to a sheave a
lllustra tion 1
Illustration 2
0
ENGIINEERIING AND
lllustration 3 shows another form of placing the Pedestal in
the Mid-Ship Cockpit Boat. The wire is basically led down
and run beneath the aft cabin sole.
The Pedestal can be placed aft in the cockpit with the pos-
sibility of placing the helmsman on a raised seat for better
visibility over the house.
MlDSHlP COCKPIT STEERING (Continued)
lllustration 3
This installation assumes the engine is directly below the
Pedestal and it is necessary to place Fig. 607 Adjustable
Idler under the pedestal to direct the wire aft a small
amount. The sheaves at the floor level can be placed on the
very aft end of the engine compartment and they in turn
will lead aft to two sheaves placed on a transverse bulk-
head directly under the aft cabin floor. These in turn direct
the wire aft, up and out to two sheaves mounted on the
'Ounk front bulkheads and then directed into the quadrant.
Emergency steering can be placed on top of the rudder
post by simply removing the aft cushion and by placing a
tiller at this point. Some owners prefer an extension that
goes through the aft deck to allow placing the tiller over
the aft deck house. This is a personal preference, but by all
means have an emergency method of steering.
The lllustration 4 installation is used on boats with
passage ways, toilets or lockers on both sides of the cock-
pit foot well. With this layout one way to steerthe boat is to
run the wires under the floor of the aft stateroom.
The Pedestal can be placed at the point up against the
ridge deck or in the normal aft position in the cockpit. If
laced forward it does allow the helmsman to be protected
Qn poor weather by the dodger. In addition, the engine con-
trols and instrumentation can all be mounted on the aft end
of the house. This can then place all of the wiring in an
easily accessible trunk within the main cabin.
The wire from the pedestal goes down and is "Veed" slight-
ly to allow the wires to go to sheaves fastened to the engine
IMSTALWTION GUIDE ds4t.n
for further i n formation please refer
to the "Pull. -Pull"section and the
"How to Inst ~al1"section of the catalog.
stringers. The wire is then directed aft under the floor in
the natural "V" of the hull. Aft to two sheaves which can be
placed on a simple structure and then out and up to two
sheaves and then into the quadrant. Note how the sheaves
can be fastened to existing bunk fronts andlor bulkheads.
Very important to keep costs in line as well as to keep the
structures simple. .
PLANNING FOR THE PULL-PULL SYSTEM
Edson's new Pull-Pull Steering System is ideal for mid-ship
cockpit boats up to about 42' in length. The Pull-Pull Sys-
tem is an alternative to the standard wire rope and sheave
installation. The following illustrations show just a few of
the many uses of Pull-Pull Steering.
lllustration 5 shows a Destroyer Wheel with a Fig. 338 or
410 Steerer mounted in a cockpit moldment. The moldment
houses engine instrumentation and controls while serving
as a table for cockpit entertaining. Since the quadrant is
mounted on the aft side of the rudderpost, the cables are
crossed within this structure for proper steering direc-
tion.
In this case, one cable runs along the port side to the quad-
rant while the other cable runs directly down the starboard
side. With this type installation, the cables can be anchored
to an existing moldment or plywood reinforcement. Here, it
is attached to the plywood reinforcement normally placed
under aft bunks.
lllustration 6 shows the Pedestal installation using the
841 Mounting Plate for attaching the cable. The cable is
routed along the starboard side under a bunk to a Radial
Drive. One wire can run across to a sheave mounted on the
other side and back into a regular quadrant if space does
COMBINATION PULL-PULL CABLE AND SHEAVES
lllustration 7 shows the cable running down, over the
engine, and aft under the cabin sole. With the sharp bends
aft, the system converts to a standard wire rope and sheave
arrangement connected to a quadrant or Radial Drive.