O.S. Engine®: Basics on the GT55 Gas Engine

With the GT55, large-scale gas modelers can enjoy 20-30% more power than comparable engines, with O.S. precision as a bonus. Field footage shows the performance, with the GT55 mounted in a Great Planes® 25% Pitts M-12s. The pilot first drops the Pitts into a harrier, and goes right from that into a fast, vertical climb that takes the Pitts almost out of sight in seconds. Small wonder. The GT55 is the product of over two years of intensive R&D, backed by seventy-five years of engine manufacturing experience. A Walbro® pumper carb guarantees a constant flow of fuel. The O.S.-developed IG-01 electronic ignition system automatically adjusts timing for maximum output, compensates for wet plugs and signals low-voltage conditions. You'll find basic specs on the GT55 below. You can learn more from the five-minute "O.S. Engine Video Update: GT55 Gas Engine" video on YouTube: http://www.youtube.com/watch?v=wWaUwD3ICcI But for complete information about the GT55 gas engine, visit its product page at http://www.osengines.com/engines/osmg1555.html. OSMG1555 Displacement: 3.352 cu in (54.9 cc) Bore: 1.618 in (41 mm) Stroke: 1.618 in (41 mm) Output: 5.5 hp @ 7,000 rpm Practical RPM: 1,500-8,000 Join O.S. on Facebook! Go to http://www.facebook.com/pages/OS-Engine/244452913806 to interact with O.S. product experts and modelers like you. Interested in the Great Planes Pitts M-12s? Learn more about it at http://www.greatplanes.com/performance/airplanes/gpma1421.html