|OS .91 VR-DF|
|O.S. Ducted Fan Engines offer incredible
performance and unsurpassed reliability. Designed to fit
the popular ducted fan units, these ultra-high rpm
engines feature ABC piston/sleeve construction for high
compression and superior output. Developed to produce the
high horsepower serious ducted fan fliers crave.
Due to their high-speed performance characteristics, O.S.
does not offer a 2-year warranty on ducted-fan engines.