User manual MVVS 80 V1.1 ASSEMBLY EXHAUSTS 3211I

[. . . ] ** Power output varies with the exhaust used. The value given in the table stands for the maximum available power output. Safety precautions 1) 2) 3) Never use the engine for any manned vehicles. When operating model planes, always follow the rules and laws in effect in your country. The manufacturer declines all responsibility for all damages arising from the operation of models and other appliances droved by MVVS 58 engine. [. . . ] Caution: intake of warm air from beneath the cowl may cut the engine power output. Note: Attach a hose to the airpressure inlet on the carburetor and terminate it outside the cowl. When mounting the engine in the model use seals to protect all openings and prevent the pollution of the engine's inside with sawdust, residual abrasives etc. Make sure that the inside of the fuselage is clean and that all parts are tighten in place and cannot be sucked inside the engine. Selecting a suitable propeller It is usually the case that propellers of the same dimensions coming from different manufacturers are not the same. Oftentimes not even propellers of the same dimensions produced by a same manufacturer are not the same. The engine power is best utilized when the propeller dynamics curve and engine power curve (revolutions/power output) intersect in the area of the engine top power output. Unfortunately, no propeller manufacturer provides this information. Engine power output is also a variable quality. It depends above all on the silencer used and can considerably vary. The situation is further complicated by environmental parameters (temperature and atmospheric pressure in particular): low temperature and high pressure increase propellers' input requirements by 20% in comparison with input in a hot weather. Suggested propeller dimensions: two-blade: 22x10, 22x12, 22x14 24x8, 24x9, 24x10, 24x12 25x7, 25x8, 25x9, 25x10, 25x12 26x7, 26x8, 26x9, 26x10 22x10, 22x12, 24x9, 24x10, 24x12 three-blade These values are only approximate and may vary with the factors described in the previous section, as well as with the type of the exhaust system used. If engine does not accelerate properly, open the needle by another 10 min. If it does not accelerate, the defect supposed to be elsewhere than in incorrect adjustment. In this case go to the section on problem solving. Step III If the engine accelerates correctly, according to the above test, set it at idle speed and accelerate to full speed. If the engine functions correctly, go to Step IV. If it cuts out, open the L needle by 5-10 min more. If the engine does not respond to acceleration fast enough keep closing the L needle until the engine starts to cut out in response to gas. At that point reopen the L nozzle by 5-10 min. Step IV Crankcase pressure inlet Throttle lever Fuel inlet If the engine reacts correctly set it at full speed. If revolutions do not drop, the engine has been adjusted successfully. If revolutions seem to drop, open the adjusting needle H by approx. [. . . ] 4) If the engine still would not start, unscrew the plug and check its contacts. Clean any possible petrol moisture (i. e. an indication of engine overflow) and screw it in again. Further starting should only be done with the throttle turned down. [. . . ]