O.S. 56FS-α Ringed 4-Stroke Engine for Airplane (with Muffler)
Ushering in a new era in O.S. 4-stroke technology: the 56FS-a. It's the first in the alpha series, with the latest advancements for boosting your plane's performance. Same mounting dimensions as the FS-52 Surpass for easy upgrade.
Features:
- Mounts with no-mod ease in the same space as the 52FS.
- In addition to less noise, the muffler features a multi-positional manifold with a rubber O-ring that helps prevent oil leakage.
- A newly designed lubrication system eliminates the need for crankcase ventilation.
- The 40NA carburetor is equipped with a venturi that reduces the chance of fuel leaking out onto the cowl, while also creating more positive air/fuel flow.
Package Included:
One O.S. FSa-56 4-stroke Engines
F-4040 Muffler
Type F glow plug
Instruction manual
Specifications:
Displacement: 0.569 cid (9.32cc)
Bore: .945" (24mm)
Stroke: .811" (20.6mm)
Practical RPM: 2,400-13,000
Weight: 14.8oz (419g)
Crankshaft Size: 1/4-28
Break-in Needle Valve Settings: 2-2.5 turns from fully closed
Distance Between Mounting Holes Same Side: .69" (17.5mm)
Distance Between Mounting Holes Opposite Side: .16" (44mm)
Height from Crankshaft Center to Rocker Cover: 3.3" (84mm)
Distance from Crankcase Center to Prop Hub: 2" (50.8mm)
Distance from Crankcase Center to End of Crankshaft: 3.5" (88mm)
Distance from Crankcase Center to Throttle Lever Center:1.3" (32.5mm)
Width of Crankcase Below Mounting Tabs: 1.3" (34.1mm)
Angle of Muffler in Relation to Engine: 11°
Needle Settings:
High Speed: 2.5 - 3 turns out from fully closed
Low Speed: Flush with carb body
Requires:
Fuel: 5-20% nitro with 18% lubricant content
Propeller: Sport & aerobatic; 13x6, 12x6-8
Scale; 13x6-7, 12x6-8
(break-in engine with prop intended for use on model)
Electric starter, glow starter and field equipment
Code No. 34300
Note:
We have full range of O.S. products, if you cannot find your desired product(s) in our online store, please send request to cs@rc711.com.
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