Fly for 1/20th the cost

Model Airplane News, Nov 1997 by Chianelli, Chris

Thanks to ProSpark, It's now possible to run the popular O.S. 1.08 on regular unleaded gasoline-with no power loss when compared with Clow operation, according to ProSpark. This is possible because the user can change the spark advance timing electronically while the engine is running for optimum performance-a feature found only on the ProSpark Ignition system. Timing returns to 0 degrees at rest, so firing occurs at TDC, giving easy starts with no kick-backs. Also offered is a Walbro carburetor and adapter that provide good fuel draw and reliable performance regardless of fuel-tank position, fuel level or aircraft attitude.

The ProSpark and Walbro carb come as bolt-on units. Only two small holes need to be drilled for the pressure-tap fitting and on the prop-drive hub for a Hall sensor magnet. The unit comes with an RlC, long, glow-plug-size, NGK spark plug. The user need supply only a standard radio switch and 4.8V battery. For more information contact Cabral Systems Inc. 2459 Tualatin Valley Hwy. #465 Hillsboro, OR 97123-7919; (503) 629-9378; (800) 646-5745; fax (503) 6482261.