Buy a new O.S. engine between August 3, 2009 & December 31, 2009 and trade in an old engine, you'll receive up to $150 in Bonus Bucks as a reward. They come in the form of a merchandise certificate which you can use to buy products from many of R/C's most respected manufacturers.

For each O.S. engine purchased, provide the items below and mail to: O.S. Bonus Bucks, 1608 Interstate Dr., Champaign, IL 61826.

• A completed request form, Download the Form Here
• A dated retailer sales receipt
• A proof-of-purchase from your new engine
• Your trade-in engine

For Bonus Bucks Reward Amounts & Complete Rules Visit the Official OS Bonus Bucks Website

Twin Engines

Twin Engines for the ultimate scale experience

• FT-160 is a bored-out version of the FT-120 II with a 15% power increase.
• FT-300, O.S. largest horizontally opposed flat twin , is ideal for 1/4 scale smoother, more compact and realistic than chainsaw type gasoline engines
• Both twins include glow plug, firewall mount and special propeller locknut assembly

FT-160 Twin

Part No. OS MG1160 Displacement: 0.809 x 2 Bore: 1.091 Stroke: 0.866 RPM: 2,000-10,000 Output: 2.0 @ 10,000 Weight: 38.8 CART  ADD  Price $799.99* Prices with * Include Ground Freight (48 states).

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FT-300 Twin

Part No. OS MG1250 Displacement: 1.488 x 2 Bore: 1.323 Stroke: 1.083 RPM: 1,800-9,000 Output: 4.0 @ 7,000 Weight: 64.5 CART  ADD  Price $949.99* Prices with * Include Ground Freight (48 states).

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FF-320 4 Cylinder

The only ringed piston, "flat four" R/C engine available

• Twin opposing cylinder self dampens most vibration smooths operation for longer engine and airframe life and minimizes vibration related damage to radio gear
• Features pushrod overhead valves, seven ball bearings, propeller locknut assembly and firewall mount

Part No. OS MG1320 Displacement: 0.809 cu in (13.3 cc) x 4 Bore: 1.091 in (28 mm) Stroke: 0.866 in (22 mm) RPM: 1,800-8,500 Output: 4.1 hp @ 8,000 Weight: 77.3 oz (2,190 g) Recommended Props: 18x10-14, 20x8-10, 22x8 CART  ADD  Price $1399.99* Prices with * Include Ground Freight (48 states).

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FR5-300

Reproduce the "Golden Era"

• Radial design mimics the look of "Golden Era" planes for more convincing scale appearance
• Four ball bearings and two needle bearings smooth operation, reduce friction and extend engine life
• Ringed piston powerhouse features pushrod overhead valves, special inlet manifold, propeller locknut assembly and radial mount.

Part No. OS MG1300 Displacement: 0.607 cu in x 5 Bore: 0.945 in Stroke: 0.866 in RPM: 1,800-8,000 Output: 4.0 hp @ 8,500 rpm Weight: 94.3 oz Recommended Props: 18x12-14, 20x8-10, 22x8 CART  ADD  Price $2299.99* Prices with * Include Ground Freight (48 states).

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