User manual DESERT AIRCRAFT DA100

[. . . ] TM DA100 Owners Manual Introduction The DA 100 was designed to provide the highest quality and performance in Giant Scale modeling. Unlike most other large gas engines on the market, the DA 100 is not a combination of various industrial motor parts. Desert Aircraft computer designed the DA100 from the ground up as a high performance aircraft engine. Existing cylinders, pistons and crankshafts were plentiful and cheap, but did not offer the performance and other features that we needed. [. . . ] 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. Standard size R/C receiver switches are not recommended. · Isolate the charge circuit from the ignition while charging the batteries. In other words don't "charge" the ignition module. · Use 4. 8 or 6 volt rated batteries only. Higher voltage will damage the ignition system and will void the warranty. We recommend a 1400 mAh or larger capacity pack. With this size, the ignition should last longer than your receiver pack will. If the meter shows 5. 0 volts or less, don't fly, re-charge. (A 4. 8 volt pack will read 5. 2 + when fully charged. ) · 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. This helps to prevent the motor from firing accidentally. 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, not the shielded ignition wires!If the cap seems loose, and is not making a solid metal to metal contact with the spark plug base, contact Desert Aircraft for a replacement. To prevent radio interference, the spark plug caps must have the split retainer ring around the base to insure a tight fit to the spark plugs ­ DON'T FLY WITHOUT THEM!· 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. [. . . ] Motor runs poorly in flight, especially during aerobatics · The motor might be too rich. Make sure both needles are adjusted to peak performance. · Make sure carb has not become loose causing an air leak. Check that the fuel clunk is not stuck in the wrong position. [. . . ]