A look at the well-known engine maker's second gas offering
Featured in the May 2013 issue of Model Aviation magazine
by Jim Rice
When Jay Smith asked me if I wanted to review the O.S. GT-33 gasoline engine, I jumped at the opportunity. I have flown nearly all kinds of RC aircraft during the past 55 years, and many have been powered by O.S. glow engines.
I have settled into the 20-30cc gas category and three-cell park flyer electrics. I currently have two airplanes with 20cc engines and two with 30cc engines. I am about to test-fly a new biplane I designed with both those engine sizes…