User manual DESERT AIRCRAFT DA150

[. . . ] Along with excellent fit and finish, precise bearing alignment is insured, which is critical to engine performance. The reliable Desert Aircraft auto advance, electronic ignition system insures easy starting and high performance. This ignition provides a powerful spark, yet is fully shielded to insure protection from R/F noise. The DA150 has proven to be the ultimate aerobatic engine by dominating and winning the 1999 World Aerobatic Masters, the 2000 Tournament of Champions, 2001/2003 IMAC Nats, 2001/2003 Tucson Shootouts, 2002 and 2003 JR Challenge. [. . . ] Sometimes placing heat shielding material between the exhaust and carburetor can help. 3 Ignition System · When making electrical connections to the ignition system, use the same gauge wire (or larger) as used on the red and black power leads on the ignition module, all the way to the battery pack. Heavy-duty plugs, as supplied on the ignition or as used on electric cars and planes, are recommended. · Use a high quality switch such as JR's heavy-duty switch. · Isolate the charge circuit from the ignition while charging the batteries. Higher voltage will damage the ignition system and will void the warranty. With this size, the ignition should last longer than your receiver pack will. · Unlike some ignitions, the Desert Aircraft ignition is designed to spark only when the prop is flipped at a high speed. If the prop is not turned over at "starting" speed, the ignition will not fire. Unless you are having problems starting the motor, don't bother "testing" the ignition with the plug removed from the cylinder. · When removing the spark plug caps, PULL STRAIGHT out on the caps. If caps seem loose and are not making a solid metal to metal contact with the spark plug base, use a small hose clamp around the base of the cap to keep them firmly attached to the base of the plug. To prevent radio interference, the spark plug caps must have the split retainer ring around the base to insure a tight fit. · Protect the shielded plug wires from rubbing against fiberglass or sharp edges of wood or metal. Rubber grommets and plastic "spiral wrap" insulation from automotive or electronic supply stores work well. Holes in the braided shielding can emit R/F noise (i. e. : RADIO INTERFERENCE!) · Keep ignition components and wiring separated, as much as possible, from your receiver, receiver battery, servos, wiring and switches. · Don't use metal-to-metal linkages to operate the throttle. Range with one section of the antenna extended should be at least 80 to 100 Ft. Check for holes in the braided shielding or loose connections (spark plug caps, connectors and switches). If that doesn't solve the problem, re-locate your ignition and receiver components farther apart. If the problem persists, return the ignition to Desert Aircraft for inspection. · Plug gap is . 015" to . 020" (. 38 to . 50 mm) 4 Fuel and Oil Mix · Mid to High octane gas is recommended. · We recommend filtering your fuel, between your fuel container and your plane's fuel tank. [. . . ] This can be done with a small aluminum plate protruding out from the rear side of the intake or a beveled velocity stack. This lets the carb "see" a positive airflow regardless of the planes attitude. If the diaphragm plate is removed for any reason, be sure the diaphragm pin on the center of the diaphragm is inserted in the metering lever "fork". Research Loop Tucson, AZ 85710 USA Ph 520 722 0607 Fax 520 722 5622 Email desertaircraft@theriver. com DA150 WARRANTY Your DA150 motor and ignition system are covered with a 2 year warranty by Desert Aircraft, starting from the date of purchase. [. . . ]