O.S. 72FS-α Ringed 4-Stroke Engine for Airplane (with Muffler)
Everyone knows about how the 56FS-a, 81FS-a and 110FS-a deliver superior 4-stroke power and performance, as well as how they've revolutionized the engine industry. Now, O.S. has filled in the missing link with the release of the 72FS-a. Pilots of .60-sized aircraft can now enjoy such FS-a benefits as a blow-by internal oil system. It eliminates the need for a crankcase and re-circulates excess oil throughout the engine. No fuss...No muss...Just a first-rate engine that sets new standards while continuing traditional O.S. quality. The 72FS-a Four-Stroke – only from O.S.
Features:
- The adjustable F-5030 muffler can be rotated 360° and moved in or out for a perfect fit. Rich, deep sound is an added benefit.
- A reversible carb and narrower camshaft housing simplify installation.
- Tighter tolerances and updated engineering reduce maintenance and ease set-up.
- Delivers more performance power to sport pilots and more realistic flight to scale pilots.
Package Included:
One O.S. FSa-72 4-stroke Engines
F-5030 Muffler
61N carburetor
Type F glow plug
Instruction manual
Specifications:
Displacement: 0.72 cu in (11.79cc)
Bore: 1.063" (27.0mm)
Stroke: 0.822" (20.6mm)
Weight: Engine, 16.79oz (476g)
with Silencer & Manifold, 18.7oz (530g)
Power output: 1.2 ps/11,000 RPM
Practical RPM: 2,400-12,500
Height from Bottom of Mounting Tab to Top of Crankcase: 3.5" (90mm)
Width of Crankcase below Mounting Tabs: 1.4" (36mm)
Center of Mounting Holes Same Side: .79" (20mm)
Center of Mounting Holes Opposite Side: 1.8" (45mm)
Center of Front Mounting Hole to Drive Washer: 1.9" (49.5mm)
Center of Rear Mounting Hole to Drive Washer: 2.7" (69.5mm)
Center of Crankcase to Center of Needle Assembly: 0.83" (21.3mm)
Center of Crankcase to Outer Edge of Needle Assembly: 1.3" (33.7mm)
Muffler Angle in Relation to Engine: 11°
Needle Settings:
High Speed: 2.5 - 3 turns out from fully closed
Mixture Control (low speed): 2 turns out from fully closed
Requires:
Fuel: 10%-20% nitromethane with 18% lubricant. Synthetic, castor, or a synthetic/castor lubricant blend may be used.
NOTE: Certain four-cycle fuels cannot be used due to low oil content. However, SOME four-cycle fuels such as the Wildcat 4-Cycle 15% may be used due to its 18% oil content. When choosing fuels for this engine, be sure to select a fuel with at least an 18% lubricant content.
Propeller: Sport and aerobatic scale 12x7, 13x6-8, 14x6-7
Code No. 34720
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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