| 词条 | Rotax 618 | ||||||||
| 释义 |
The Rotax 618 is a {{convert|73.8|hp|kW|0|abbr=on}} two-stroke, two-cylinder, liquid cooled, gear reduction-drive engine that was formerly manufactured by BRP-Rotax GmbH & Co. KG. It was designed for use on ultralight aircraft.[1][2] DevelopmentThe 618 features liquid-cooled cylinder heads and cylinders with a rotary valve inlet and an exhaust valve. Cooling is via one or two externally mounted radiators. Lubrication is by use of pre-mixed fuel and oil at 50:1 or oil injection. The 618 has dual Ducati capacitor discharge ignition systems and is equipped with two piston-type carburetors. It uses a manifold-driven pneumatic fuel pump to provide fuel pressure.[1] The engine's propeller drive is via a Rotax type C or E style gearbox. The standard engine includes a muffler exhaust system and an intake silencer and filter, with an after muffler also available to further reduce engine noise. The standard starter is an electric starter. An integral alternating current generator produces 12 volts and 200 watts.[1] The Rotax 618 is no longer in production. Applications{{columns-list|colwidth=30em|
}} Specifications (Rotax 618){{pistonspecs||type=2-cylinder, 2-stroke, rotary valve, oil-in-fuel or oil-injected lubrication, dual carburetors, dual ignition |bore=76 mm (2.99 in) |stroke=68 mm (2.68 in) |displacement=617 cm³ (37.65 cu in) |length= |diameter= |width= |height= |weight=59.1 kg 130.4 lb with electric starter, two carburetors, radiator, intake silencer, exhaust system and E gearbox |valvetrain=rotary inlet valve, exhaust valve |supercharger= |turbocharger= |fuelsystem= |fueltype=premium unleaded: RON 90 octane or higher leaded or unleaded or AVGAS 100 LL |oilsystem=oil-in-fuel (pre-mix) at 50:1 |coolingsystem=liquid cooled |power=55 kW 73.4 HP SAE @ 6750 RPM |specpower= |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight=0.56 hp/lb (1.07 kg/kW) }} See also
References1. ^1 2 Raisner, William: LEAF catalog, pages 6-105. Leading Edge Airfoils, 1995. 2. ^{{cite web|url = http://www.leadingedge-airfoils.com/pdf/618info.pdf|title = 618 UL - 73.8 HP|accessdate = 7 January 2012|last = BRP-Rotax GmbH & Co. KG|authorlink = |year = n.d.}} {{Rotax aeroengines}} 2 : Two-stroke aircraft piston engines|Rotax engines |
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