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Product Name: Direct Crank Sensor
Product Description
Light Speed Engineering, LLC has developed two different devices to send crankshaft position information to the Plasma CD ignition systems. One method uses the Hall Effect Module which is installed in the accessory case and senses crank shaft position by means of the non-impulse magneto gear. The second mechanism is the Direct Crank Sensor system described here. All 6-cylinder engines use the Direct Crank Sensor.
The crank sensor circuit board has two completely independent triggering systems if it is used for dual Plasma CDI applications. On single installations only the outer set of sensors and associated wiring is installed.
This crank sensor concept requires removal of the flywheel for installation. The outer trigger magnets are installed on a 4.000" radius. The inner trigger magnets, used for a second system, are installed on a 3.840" radius. The gap between the sensor surface and the marked surface of the triggering magnets should be 0.030” to 0.060”. The clearance should fall within these parameters with the crankshaft pushed in and pulled out. It may be necessary to shim the mounting plate from the crankcase to achieve this clearance.
Please refer to the following pictures, as well as those posted on the Ignition Installation page, for reference on mounting the sensor plate to your crankcase and integrating the trigger magnets into your flywheel. Use a number 32 drill, 1/8” deep so that the magnets can be pressed in flush with the surface. Use loctite and stake around them. Two or four magnets are included. Single systems require only two magnets with 45 degrees separation on the 4” radius. Looking into the pulley side of the flywheel, the left magnet position should always line up with the TDC indication under the starter ring gear. For the other magnet position, add 20 degrees to the recommended timing for your engine and install it on the same radius to the right of the first magnet. On engines that should have their magnetos timed at 25 degrees the leading magnet should be installed at 45 deg BTDC and thereby 45 degrees to the right of the TDC magnet. High compression engines should have their lead magnets installed 40 degrees BTDC. Only the north pole can trigger the sensors. This is the face marked with an X and therefore, should point to the sensor. In other words, the X must be visible after installation. If the X is not clearly visible, use a compass to identify the correct polarity.
Company Details
Light Speed Engineering, LLC, Located at the historic Santa Paula (SZP) airport in Santa Paula, California, has specialized in design, development and production of speed modifications for sport aircraft registered in the experimental category... more
| More Products of this Company: |
Aerodynamic Modifications, COMPLETE PLASMA CDI KIT, COMPOSITE SPINNER, Dual Electronic Ignition, IGNITION, NACA Duct, O-200 Pistons, PLASMA CDI FEATURES, PLASMA II PLUS, PLASMA III, Sparkplugs, Wheel Fairings |
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Class Dividers / Partitions, Mechanical Drive Fans, PLASMA III |
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