pedestal steerer - L-36 Fleet

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AUTO-PILOT STEERING SYSTEMS ./ ..
When planning your steering system it is best to think ahead. Auto-Pilots are more popular than ever and easier to install. Edson nas
developed three basic methods of attaching auto-pilots. first - all Edson Bulkhead Steerers, Rack and Pinion and Worm Steerers can have
auto-pilots attached directly to the wheel shaft extension or the wheel shaft itself -nothing extra to purchase. Second - the use of the
Edson Figure 320 Auto-Pilot Drive with the addition of one or two sheaves and the appropriate roller chain can adapt virtually all Edson
Pedestal Systems to Auto-Pilot attachment. With the 320 the boat can use an extra quadrant or radial drive for a completely separate system
or can introduce the 320 in to the basic wire system. Third - the all new Edson "Rapid Drive" for a right angle gear box drive - the simplest
system for owner, yard, and boat builder.
As a general guide the simpler the system the better. On any installation
involving electricity the area must be well prote~ted from moisture and the
wires used must be of the correct size and used with good solid terminal
ends. At no time can the unit be exposed to salt water such as would occur
if the electrical panel was placed below a sail locker. As obvious as this may
sound we still see many units so mounted. The compass unit must be kept
away from the boat's navigation compass as well as from other interferences
such as an alternator on an engine.
Take the Fig. 320 Pedestal System first. There are two basic concepts that
can be used in the installation of an automatic oilot with a oedestal. One is
to place the Fig. 320~uto-pilot Drive Unit withinthe boat's existing steering
system. This would be as in illustrations 1 and 2. A second method would
FIG. 320 AUTO-PILOT DRIVE SIZE 2
be to use a second auadrant or radial drive that would in effect make an in- The Edson Fig. 320 is an investment cast non-magnetic
dependent system. here is a great deal of merit to this latter approach as brass frame with oil impregnated bronze bearings, bronze
any boat would then have three methods of steering. There would be the sprockets, and easily adapts to all wire rope steering sys-
:egular boat's steering system, the automatic pilot driven by electricity and
tems, either under the pedestal or in a remote location. Ail
model pedestal steerers, and the Auto-Pilot Drive Unit use
the emergency tiller. The extra quadrant or radial drive would eliminate having
5/8"115.87 mm chain which travels 6.9"117.5 cm per turn of
to cut into the boat's system and is generally the preferred method for con- the steering wheel. Sprocket data: 5/8"/15.87mm pitch, 11
version to an autopilot. As can be seen in Figs. 3 and 4, the extra quadrant tooth, 2.2"15.6cm pitch diameter.
or radial drive can be placed above or below the regular steering system's
quadrant or radial drive and in the case of the quadrant on either the forward
or aft side or for that matter on a fore and aft plane. The ultimate choice is
determined by where you have room for the actual pilot.
TYPICAL AUTO PILOT ARRANGEMENTS
NOTE: See Midship Planning Page 44 for more auto-pilot arrangements.
WORM STEERERS
Worm Steerers can have the Pilot Sprocket
on the aft extension or between the rudder-
ost and the aft side of the wheel. Before
guilding the boxlcover you must first
establish the size of the sprocket that is
furnished by the pilot manufacturer.
1-6 -
RACK AND PINION
Edson Rack and Pinion
Steerers can all have Pi-
lots attached just fopvard
of the steerer frame.
ORDERING INSTRUCTIONS - 7 " L, y-
When planning an Auto-Pilot System you must furnish the pilot manufacturer the number of turns hard over to hard over in 90" in your steer-
ing system so they can recommend the proper size drive sprocket. The number of turns and length of roller chain for a given size quadrant or
Radial Drive is shown in the selection chart for each type steerer. In the case of conversion to a pilot hith a pedestal, it is necessary to pur-
chase the following items: 1) Fig. 320-Size 2 Auto Pilot Drive Unit, 2) an appropriate length of 5 /~" Roller Chain, Fig. 630s. The length is determined
by the quadrant or Radial Drive size to which the pilot is to be attached. This should be accompanied by the necessary wire rope, roller chain,
master links, end fittings, and the necessary extra sheave or sheaves to accomplish the installation. Be sure to use the same size sheaves as
are in the regular steering system for the boat.
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RAPID DRIVE
A MEW CONCEPT IN AUTO-PILOT STEERING
Rapid stands for Rack and Pinion Independent Drive and incorporates the
latest in engineering from Edson. Rapid is adaptable to virtually all types of
boats be they power or sail with wheel or tiller. The steering system must
be of the easily reversing type or in the case of a Hydraulic Steerer be
capable of being totally bypassed. The unit attaches directly to the rudder-
post of the boat and the frame of the Rapid bolts to a flat platform 90" to
the rudderpost. The auto-pilot attaches to the Rapid unit with conventional
sprocket and chain reduction and with Rapid Drive there is no need for
additional rudder stops except in the case of tiller steered conversions.
Precision cast bronze aears orovide effortless ooeration. without notice-
able friction or noise. hi unit'operates withl.8tu;nsof the shaft in 80°0f
rudder travel; your Auto-Pilot manufacturer will specify the sprocket sizes
when you order the pilot.
One of the Edson Rapid Drive features is its compactness. As noted on
the dimensional drawing, the unit takes up only a total width of 191h inches,
and a fore and aft dimension of 11" plus the 3" shaft extension. When
ordering your Auto-Pilot, please note that the shaft for the sprocket is 1"
with a lh" keyway. Maximum Input Rating of the "Rapid" Drive is 1,000
inch pounds based on a%" #41 ten tooth power unit sprocket.
One of the variations of the unit is the Fig. 319 Rapid Drive which in-
corporates the universal and an extra self-aligning bearing. This unit allows
either the basic Rapid Drive to be mounted other than fore or aft and to angle
the shaft extension to facilitate locating the actual Auto-Pilot. The illustra-
tions below show some of the many variations available when using
Rapid Drive.
ORDERING INSTRUCTIONS
Rapid is available in 6 sizes for rudderposts of various sizes. When order-
ing it is necessary to specify the rudderpost bore, keyway size and its
position, that is on the geared segment side or the cap side. The geared
segment can also be attached by pin or set screws. For these methods
pplease see the quadrant page of this catalog. Be sure and specify your pre-
e r r e x h o d .
I I
For Fig. 318 and 319 the following sizes apply:
Size 2 1/2" to 1-3/16 Rudderpost Size
Size 4 1-1/4" to 1-13/16" Rudderpost Size
Size 6 1-7/8" to 2-511 6 Rudderpost Size
Size 8 2-3/8" to 2-13/16 Rudderpost Size
Size 10 2-7/8 to 3-1./2 Rudderpost Size
Size 14 3518" to 5" Rudderpost Size
Weight: 19'hlbs.
The Rapid Drive and the Auto-Pilot must be securely held to a platform. The electrical wirGg to the Auto-Pilot must be of the size recom-
mended by the Auto-Pilot maker and fastened with good solid terminals. The installation must be protected from moisture. As in all exposed
gearing the Rapid must be covered by a clear Lexan or equivalent cover to keep equipment and fingers out of the mechanism. The clear cover
permits ready visual inspection. Maintenance of the Rapid is simple - use #30 or equal Motor oil on the shaft bearings and on the geared
segments and wipe across the bottom of the segment. Water pump grease can also be smeared on at this point. The unit should be inspected
like all steering equipment and it is wise to checkand oil it at least once a week.