Related Manuals for UMS 5-55 cc
Summary of Contents for UMS 5-55 cc
- Page 1 Technologies Private Limited User Manual For 5 - 55cc / 75cc / 100cc / 125cc / 150cc / 180cc / 210cc Gas Radial Engines (Use gasoline without Bioethanol mixture)
- Page 2 NOTICE All instructions, warranties and other collateral documents are subject to change at the sole discretion of UMS, Inc. For up-to-date product literature, and click on the support tab for this product. Meaning of Special Language The following terms are used throughout the product literature to indicate various levels...
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Page 3: Safety Warnings
Safety Warnings Model engines produce a substantial amount of power, which can create unsafe situations if not used correctly. Always use common sense and observe all safety precautions when operating, handling or performing any procedure involving your engine. Failure to follow safety precautions could result in serious injury and property damage. -
Page 4: Precautionary Guidelines
• Never handle model engines, mufflers and/or tuned pipes until they have had time to cool. They can become extremely hot when in use. Introduction Thank you for purchasing an UMS radial engine, one of the finest engines in the market place today. UMS is committed to you having a positive experience and a lifetime of great operation with your new engine. -
Page 5: Needed To Complete
Needed to Complete • 2-stroke oil • Engine baffles • Propeller • Electronic ignition battery (2S 7.4V Li-Po or 6V Ni-MH) • Fuel line (3.5mm ID) • Electronic ignition switch • Engine mounting screws Installing the Engine in the Airframe Properly installing the engine to either the airframe or an engine test stand for break-in is crucial to getting the most power and longest life from your engine. - Page 6 Centre Line Note : Install the tank on the centre line of the engine 2. Use Four steel screws (not included) to attach the engine mounting ring to the firewall. The size of the mounting ring screws will vary depending on the aircraft. Always use the largest size screw that will fit through the mounting ring.
- Page 7 Installing the Electronic Ignition NOTICE: Always observe proper polarity when connecting the ignition battery to the ignition unit. The ignition unit does not include reverse polarity protection. Ignition unit damage caused by reverse polarity is not covered under warranty. An ignition cables are labeled for each cylinder by the numbering system. please make sure you connect the cables to the correct spark plugs / cylinders.
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Page 8: Propeller Selection
Propeller selection is critical for proper engine operation. You can find recommended propel- lers and operating RPM ranges in the specification chart. UMS radial engines have a lower operating RPM range and greater torque within that range that require more blade pitch and increased in-air pitch speed for your airplane. -
Page 9: Starting The Engine
Checking for a Flooded Cylinder Because of the nature of radial engines, it is not uncommon for the lower cylinders to accumulate excess fuel or oil either in storage or during the priming process. Before beginning the starting process be sure to: 1. - Page 10 1. Start the engine. 2. Move the throttle stick up until the engine is running at approximately 2,000 rpm. 3. If you are using separate exhaust pipes, use a temperature gun to make sure hot exhaust is exiting all engine cylinders. If you are using a collector ring, use a temperature gun to make sure all the cylinder temperatures are similar and firing smoothly.
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Page 11: Maintenance
Maintenance There are a few things you must do to ensure proper operation of your UMS radial engine. 1. Use a high quality gear oil to lubricate the outer parts of the valve train at the beginning of each flying day. - Page 12 4. Start with the number 1 cylinder (this should be the upright cylinder above the UMS logo). a. Rotate the crankshaft counter-clockwise and observe the pushrod movement. b. Note when you see the exhaust and then the intake pushrod move up to open the valves.
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- Page 15 Notes...
- Page 16 “Gopal Bagh”, 1062, Avinashi Road, Coimbatore - 641 018 INDIA. Tel : +91 - 422 - 2243439 (5 Lines) Fax : +91 - 422 - 2242760 E-mail : support@umstech.in Web : www.umstech.in...