November 21, 2007

O’Donnell Super Sport .21 Engine

O’Donnell Super Sport .21 Engine

Designed in the USA by master engine tuner Steve O’Donnell, the Super Sport .21 is the pinnacle of 1/8 scale nitro racing. It’s a shining example of the “clean sheet” concept – a fresh look at engine construction and components, with nothing borrowed from existing technology. Only state-of-the-art machining and materials have gone into producing this engine with features including the original O’Donnell-designed “big head” machined aluminum heat sink head, dropped down low for a better CG. Available in February.

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– The crankcase, cylinder sleeve and piston materials are optimized for uniform expansion to improve durability and reliability
– 4-port ABC cylinder
– Balanced Max-Flo™ crankshaft with Class 5 precision bearings
– Machined 7075-T6 aluminum con rod with double bushings
– Unique, compact 40spring header attachment design
– Includes a high-performance O’Donnell #99 glow plug

The carburettor on the Super Sport .21 has all of these advantages:
– Aluminum body
– Thermal insulating sleeve that prevents vapor lock
– Low- and high-speed needles with double O-rings on both
– Hard anodized slide barrel
– 7 mm and 8 mm restrictors included

– Practical rpm range: 3,000-42,000
– Output: 2.7 hp @ 36,000 rpm

Source: O’Donnell []


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