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As time goes by, 2-stroke 46 size and 4-stroke 50~70 size models are becoming increasingly popular. Manufacturers around the world are now offering a variety of ARF aircraft. Many of these are intended for 3-D acrobatics with large control surfaces as well as scale aircraft with flaps and other operating features. Realizing the trend to this size aircraft, O.S. has introduced the FSΏ-72, that when installed in a 56 size model, will provide the extra power required for hovering and 3-D type maneuvers as well as higher torque for turning larger diameter propellers for more realistic scale flight. And, if you are into 4-stroke air racing events, the FSΏ-72s higher rpm capability will fill the need.
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Light and compact |
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Same mounting bolt pattern as the FL-70 and FS-70U for easy replacement. |
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Same silencer as the FSΏ-81 which offers more pleasant exhaust sound with a lower sound level. |
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Exhaust outlet direction and distance between exhaust port and silencer is adjustable. |
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As with other FSΏ engines, gBlow-byh internal oil system eliminates the need for a crankcase breather fitting. |
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A broad power band suitable for Scale as well as Sport models. |
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A new 61N carburetor with extended intake tube to eliminate reverse flow tendency of air/fuel mixture. It can also be reversed 180 |
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A totally new sharper crankcase design |
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Displacement: 11.79cc/0.720cu.inBore:27.0mm/1.063in.Stroke: 20.6mm/0.822in
Weight: Engine 476g/16.79oz. Silencer + Manifold 54g/1.90oz.Power output: 1.2ps/11,000r.p.m.
Practical RPM: 2,400~12,500
Suitable propellers:
12x7, 13x6~8, 14x6~7
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