This is the Novarossi REX R57HR-3DS .57 5 Port, Standard Plug Helicopter Engine, with a Rotory Carb. This engine has a powerful torque curve specifically designed for very hard 3D flying. Fast RPM recovery, easy of mixture tuning and fatigue resistance are some of the benefits of the REX 57HR-3DS. Novarossi has developed this new engine platform by working with some of the worlds top 3D Heli pilots. The R57HR 3D cooling head is "Carb-Smart" ready and the crankcase is made to standard dimension in order to fit most helicopters.     

Features:

• Cooling Head: The cooling head of our R57HR 3D engine is made from aluminum that is been chosen for its heat conducting capacity.
• Compression rings: The ignition timing is controlled with these little rings of various thickness. To change the ignition timing you can add or remove a ring of a certain thickness.
• Piston ring: The "Dykes" type piston ring has been implemented to improve the sealing between the piston and the cylinder.
• Connecting Rod: This connecting rod is made from a super light aluminum which has been checked ultrasonic to prevent premature failures. The specific form creates little turbulence inside the engine which aids the internal gas-flows.     
• Sleeve: The sleeve has 5 transfer ports and is made from iron.
• Crankcase: The crankcase is made from an special alloy, developed by Novarossi to obtain the best possible strength to weight ratio.
• 3 Needle Carburetor: This engine has an carburetor with an rotary throttle valve and comes with a 10mm body. It features a simple Min/Med/Max mixture adjustment.
• Rear cover 3DS edition: 3DS Rear Cover was redesigned to allow the Spektrum RPM sensor installation and is compatible with previous REX 57HR 3D engine edition
• Crankshaft: The crankshaft is made from high quality steel and is available in Turbo 1/4" x 28 version.
• Rear ball bearing: The rear ball bearing of this engine is made from high quality steel.     
• Combustion chamber: This combustion chamber has a semi spherical shape, in combination with the centered glow plug we created the most effective combustion process possible.
• Glow Plug: Standard Heli Glow Plug. All brands of Heli Glow Plug are compatible. Cold or Medium/Hot Plugs are advised