Asked a few people, no one can seem to give me a straight answer. I like the sound and money-savings of gas engines, I just don't know how the sizes correlate to glow. Thanks.

Somethong like a Zenoah 20cc but it weight twice as much as a 60 glow so you would kill the wing loading and it might not fit well in a cowl unless it was round
there may be some others but the cost I'm sure would go up

Honestly, I would not even think of a gas engine on a 60 sized plane. Just getting it in one could be a problem let alone getting it to balance not to mention the weight penalty would kill the flying qualities but if you must then about your best choice is the Zenoah G-20.

Of course you did not mention what plane you are considering doing this with. A huge Cub, Telemaster or something along those lines might just work.

Just to give you an idea, I had a G26 that was coverted to electronic ignition that I stuffed into a 120 size Super Stearman. I used it because the recommended glow engine also required you to build a weight box and stuff 18 ounces of lead in it so why not use something that is not dead weight and the G26 fit the bill nicely.

I would think on most 60 sized planes, the G20 is gonna be 1/4 to 1/3 the total weight of the plane

bme make a conversion for a super tigre 90

Thanks for the replies. I had no idea that gas engines were so much heavier than glow. I suppose I should wait until I get into bigger planes before I go gas.

Pete1burn:

If you sport fly, a gas engne gets a little closer to a glow of the same size, but 3D is almost out. The Elvo 26 is a converted glow engine, I would think you cound convert it back to glow at some point with the addition of a carb. Had the Elvo on a QQ-Yak 54-73". Great running little motor. It would hang, but barely had enough to pull out of a bo-bo. What saved the combo is the great flight characteristics of the airplane. Just did not know you cant stay stable with no airspeed. RC Showcase has a number of smaller gqs engines, the RCS 140 is very strong for its size. Had the rcs on a Extra 330L, 72" and flew IMAC well, but could not hold a hover. That Extra was a heavy cheepie, so the combo was not a fair compairsion. There are others that are great eye-candy, but I don't have a clue how strong they are. Right now, the trend is to build the airframes superlight and many achieve the light goal, most sacrafrice weight for strength. A ARF should be able to stay togeather with a normal landing. A little rough landing, have seen them break in half, the usual gear pulling out etc. Not a good compromise for a sport airframe. The best compromise currently seams to be the 50CC size gasser. Good strong engines with lots of great available airframes out there. Unless you enjoy expermination, best stay within current general standards. Someone will come up with a much better gasser for us, maby not in our lifetimes. ENJOY