The New OS Engine 46AX II (Version 2) with Muffler for Plane

Description

O.S. MAX-46AX BB ABL 2-Stroke Engine for Airplane (with Muffler)

As the replacement for the high-performance 46FX, it's no wonder that the .46 AX shares many of its features. The raw power. A remote needle valve. Mounting bolt patterns. A balanced "D"-cut crankshaft supported by dual bearings. CNC-machining for the piston and other parts. And the same exclusive ABL cylinder liner that has made FX reliability a byword. But all the same, the 46AX is a different – and better – engine. Why? Because times change and technology advances. And because O.S. uses the best of both to make a good engine a better engine.

Features:

• Features the 46FX's durable ABL (Advanced Bimetallic Liner) plating, as well as a new design that automatically centers, levels and seats the head during re-replacement. Head snugs down with only four screws – not six.
• Subtly tapered low-end needle eliminates surging at transition, ensuring exceptionally smooth, consistent throttle control from idle to top speed.
• Redesigned liner ports and a ball-milled inlet port minimize turbulence during fuel/air mixing, making combustion and power output more predictable.
• New high-speed needle bracket simplifies horizontal/vertical mounting – and can be replaced in just minutes.
• Minimizes vibration-induced "creep" and re-sets with a ratchet spring on the high-speed needle and O-ring seals on both needles. A simple rotor guide screw replaces the throttle stop screw – and eliminates spring-related movement.
• Includes a new low-noise E-3070 muffler and 2-year limited warranty protection.
• Includes a lock nut and longer crankshaft with more thread length, for better prop nut engagement and greater pilot safety.

Specifications:
Displacement: 0.455 cu in (7.45cc)
Bore: 0.866" (22mm) 
Stroke: 0.772" (19.6mm)
Practical RPM: 2000-17000
Power Output: 1.65ps/16000
RPM Weight: 13.2oz (375g) without muffler 
Weight: 17.2oz (489g) with muffler
Recommended Propellers: 10.5x6, 11x6-8, 12x6-7, use 10x6 for break-in
Crankshaft Size: 1/4-28
Distance from remote needle to end of crankshaft: 4.7" (119.4mm)
Distance from center of engine to drive hub: 2.4" (61mm)
Distance from center of engine to end of crankshaft: 3.4" (87.6mm)
Distance/crankshaft center to muffler exhaust outlet: 3.9" (100.5mm)
Height from crankcase bottom to top of cylinder head: 3.3" (85.2mm)
Height/crankshaft center to top of cylinder head: 2.6" (67.4mm)
Width including mounting ears: 2" (50.8mm
) Width not including mounting ears: 1.4" (35.6mm) 
Width between mounting holes same side: .69" (17.5mm)
Width between mounting holes opposite side: 1.7" (44mm) Diameter of muffler body: 1.5" (38.1mm) 
Angle of muffler in relation to engine: 4° 

Package Includes:

• Expansion-Style Muffler #E-3010
• OS MAX-46AX Engine
• Instructions manual and sticker sheet
• Two 3x30mm screws to bolt muffler to engine
• One #A3 glow plug

ABL (Advanced Bimetallic Liner) uses two O.S.-developed alloys to provide durable barrier between the brass liner and piston.

Switching the needle from a horizontal to a vertical orientation requires only a couple of minutes. A composite needle housing insulates the brass sleeve and prevents heat-related changes to needle settings.

A generously sized chamber and larger sound baffle of the Power Box™ muffler significantly reduce exhaust noise. Rotating the exhaust port provides easy finish protection – adding an exhaust deflector provides even more.

Additional Images

Click to enlarge

Click to enlarge

Click to enlarge