Oh, forgot to answer the question. I believe my last Gas/Glow 21/24cc series Echo came in at 2 lbs. 6 oz. (That's Gas/glow, with no ignition system but otherwise ready to fly, with a homemade muffler and engine mounting studs/nuts.)

As far as what they can fly... Well, I have one that is stock except for a larger bore carb and a free breathing exhaust that flies the hell out of my big Great Planes Fokker Triplane. I have another one that is hopped up that flies great on a 72" wingspan Katana. (Unlimited vertical). We have another one (a 21cc) on a Super Sportster 120 that seems like a "match made in heaven". They are light and make some decent power. They are definitely NOT limited to Cub type aircraft. If they were, I wouldn't be so interested in them. I've been flying them in aerobatic planes for years now.

A stock Echo 21cc on a Great Planes Big Stik, (not the Giant Stik) would be great and fly for pennies.... Been there, done that, for many, many flights.

Remember, both BME and FPE engines are based on Echo engines, and sell for, well just a whole lot more than I sell them for, by about a factor of four...

AV8TOR