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  Electric Motors, Engines & Accessories > Engines Glow Fuel > Engines R/C Glow Fuel Aircraft 4-Stroke - .60-1.19 Bookmark this Page

O.S. - OSMG0877 OSM34720 34720 531028019638 4531028019638
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O.S. FS72-a Ringed 4-Stroke
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O.S. FS72-a Ringed 4-Stroke
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Instruction Manuals: Manual 1 (4.3 MB)
Tower Catalog Page: 201

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Tech Notes
        This is the glow powered O.S. FS72-a 4-Stroke Aircraft Engine.

FEATURES: Ideal powerplant for 56 size aircraft-provides extra power for hovering and 3-D type manuevers, also provides torque for turning larger diameter props for more realistic scale filght Broad power band suitable for Scale as well as Sport models Same mounting bolt pattern as the FL-70 and FS-70 Ultimate New 61N carburetor with extended intake tube eliminates reverse flow tendency of air/fuel mixture, carb is reversible 180 Blow-by internal oil system eliminates the need for a crankcase breather fitting Adjustable exhaust outlet direction and exhaust port to muffler distance Same muffler as the O.S. 81FS-a offers a pleasant exhaust sound with a lower sound level Two year limited warranty

INCLUDES: O.S. FS72-a 4-Stroke Aircraft Engine with muffler, header, type F glow plug and manual

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% (CATP9109) 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

SPECS: 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, 1.18 HP/11,000 RPM Practical RPM: 2,400-12,500 Crankshaft Thread Size: 1/4 x 28 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

jxs 01/20/09 ir/jxs updt lmm 4/6/09 updt jxs 01/13/11 updt jml 02.04.11

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Phone: 217-398-8970
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Accessories Needed
This is the glow powered O.S. FS72-a 4-Stroke Aircraft Engine. FEATURES: Ideal for 56 size aircraft, same mounting pattern as FL-70 & FS-70U F5030 muffler w/rubber O-ring in multi position manufold, type F glow plug REQUIRES: Fuel-10-20% nitro w/18% lubricant, prop, field equipment

Accessories for the O.S. FS72-a Ringed 4-Stroke

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 LXHY34 Top Flite 13x6 Power Point Propeller
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4.49   In Stock
 LXRXC4 Tower Hobbies TOWER Power 10% Airplane Fuel Quart
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6.69   In Stock
Subtotal for this Group of Accessories: 11.18  
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