The new power source for .60 sized aircraft!  
OS Engines 75AX .75 ABL glow engine, with 61A carburetor and OS E4040 Muffler.  

Features:

Fits the same mount and bolt pattern as the 61FX.
The angular head design looks great and significantly increases surface area for better cooling.
Includes the new "Power Box" muffler, designed with more volume for increased power while still being very compact.

SPECIFICATIONS:

Displacement: 0.75 cu in (12.3 cc)
Bore: 1.02 in (25.8 mm)
Stroke: 0.93 in (23.5 mm)
Practical rpm: 2,000-16,000
Output: 2.4 hp @ 15,000 rpm
Weight: 19.4 oz (550 g)
Recommended Props: 14x6, 14x8, 15x7