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DC
Mini Sensor and Magnet Ring |
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On
Lycoming Engines, a Magnet Ring is
installed in the flywheel to provide the
trigger for either a single or a
dual Mini Sensor installation.
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DC
Mini Sensor and Lycoming Mounting Bracket
The
sensors are completely sealed and potted
in their billet machined aluminum
protective enclosures and mounted on
stainless steel brackets.
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DC
Mini Sensor Installed on a Lycoming 360
in John Lynch’s RV-4.
The
Mini Sensor stainless steel mounting
bracket fits to the engine crank case.
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Lycoming
Engine: 4-cylinder Dual DC Mini Sensor
Installation
Single
systems require only one Mini Sensor.
On dual 4 cylinder engine
installations, there are two Mini Sensors
at 180 degree intervals. On dual 6
cylinder installations, a second Mini
Sensor is mounted 120 degrees from the
first.
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mini sensor blocks can be mounted on
almost any radius, which provides great
flexibility in mounting options for all
engine types. |
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Continental
6-cylinder Engines:
The
following pictures are Mini Sensor parts
and installation on a Continental 550
engine. |
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DC
Mini Sensor Magnet Ring for Continental
6-cyl. Engines |
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Single
Mini Sensor Installed in the Top Position
on Jerry Mercer's Continental 550 Questair
Venture |
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The
mounting bracket for the top position Mini Sensor
on Jerry Mercer's
Continental 550 Questair Venture |
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Continental
O-200 Engines:
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Continental
O-200 Mini Sensor installation on the top
of the engine. The trigger magnet
bracket is not installed in this picture
in order to provide a clear view of the
mini sensor mounting bracket. |
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Top
Mini Sensor on O-200 with the Trigger
Magnet plate installed. |
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Mini
Sensor installed on the bottom of the
Continental O-200 to provide the trigger
to the second system in a Dual Plasma CDI
installation. On Dual 4-cylinder
installations, there are two mini sensors
installed at 180 degree
intervals. |
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Jabiru
Engines:
Here
are pictures of the Dual Mini Sensor
installation developed by Henri Malerba
for his 240mph Vari Eze.
On
Jabiru engines, the trigger magnets can be
installed directly into the aluminum
flywheel.
No Magnet Ring is needed.
Light
Speed Engineering provides drawings for
all Jabiru brackets. |
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Original
Jabiru Coil Mounts with LSE Mini Sensors |
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Jabiru
Engine:
Mini Sensor Facing the Aluminum
Flywheel |
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Franklin
Engines:
Here are
pictures of the Franklin Engine using the
new DC Mini Sensor.
Mini
Sensors are readily available but are not
currently supplied with Franklin mounting
brackets and magnet ring.
Light Speed Engineering provides
drawings for all Franklin brackets and the
magnet ring.
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Franklin
Engine: 6-cylinder
Dual DC Mini Sensor Installation
Integration
to the Franklin Engine designed,
installed, and photographed by John
Burnaby. |
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Technical
Description of the Mini Sensor Concept
The
Mini Sensor consists of two billet
aluminum machined halves that capture a
small circuit board holding 3 Hall effect
sensors at 0.250” spacing.
For environmental protection, they
are completely sealed and potted.
On 4-cylinder engines, only the
outer and middle sensors are used.
The
Magnet Ring has two magnets installed on
the same radius as the outer sensor.
Another two magnets are installed
on the same radius as the middle sensor
(0.250” less). On 4-cylinder Magnet Rings, this second set of magnets is
located 180 degrees from the first set.
On 6-cylinder Magnet Rings, this
second set of magnets is located 120
degrees from the first set. Additionally, 6-cylinder Magnet Rings have another two
magnets mounted on the same radius as the
third (inner) sensor (0.250” less than
the second pair and 0.50” less than the
first pair). This third set of magnets is located 240 degrees from the
first set.
Mounting
the Magnet Ring
to the Lycoming flywheel requires drilling
and tapping 6 holes. For best
precision this should be done on a CNC
machine or on a precision fixture at
Light Speed Engineering. The
flywheel modification and magnet ring
installation is $95 plus shipping.
Alternatively, pre-drilled flywheels are
available for purchase from Continental
Motors, formerly ECi, or Lycoming
Thunderbolt division upon
request.
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