While it is typical to power an electric aerobatic plane at about 100 watts in per pound today, that is not the case for a non-competition old-timer. The reviewer noted that his plane weighed 4.5 lbs. 35 * 2000 (high end equivalent watts for a 2-stroke) = 700 watts 35 * 1500 (low end equivalent watts for 2-stroke) = 525 watts 52 (4-stroke displacement) * 0.6666667 (ratio used for equivalent power to a 2-stroke) =. Overall weight 4.5 lbs."Ī typical 52 four-stroke has the equivalent electric power of somewhere between 525 watts and 700 watts depending on the prop used, make of four-stroke, fuel and weather conditions. I found the Ben Buckle kit available at and I also found a review at The information on the Ben Buckle kit indicates that it has a wing span of 72-inches/1829mm and the "Tip dihedral and the long fuselage make this lovely model unmistakably vintage." The reviewer noted, "I used a SC 52FS which is far too much power but all I have at the moment. The Red Zephyr was designed by Herb Greenberg and flown at the 1936 NATS (U.S. Selecting a power system for an old-timer can be a daunting task. I am sure that it will provide me with continuing access to many informative items via your monthly magazine. Now that I have found your site I have locked it in as one of my favourites. What is your opinion regarding this model? Any advice will be gratefully received. My first purchase for a plane, has been a RTF E-Flite Apprentice, and have attracted a deal of negative comments from one of the clubs instructors (not the one that is teaching me). As I am contemplating constructing one myself I would appreciate your advice on what you believe is the correct match for this plane. He ultimately settled on a '60' size outrunner, and has discovered that on test it shows that it draws little power. A neighbour has recently completed building a "Red Zephyr", and really scratched around (after being given dubious advice) on selecting a suitable electric motor size for his plane. In learning to fly at our local flying club, I have been flying an old timer and have been converted to the serene feeling of flying these magnificent links with the past. After accessing some of your back issues on the web it seems that you would be a great source for some much needed help. I am a new convert to model planes and have recently stumbled upon your web site for the Ampeer and live in a delightful bay side village on the south coast of New South Wales Australia.
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