Folks:
This is a gasser newbie question, which I do not see addressed in the forums.

The guys at my club counsel that gasser less than about 45-50cc are too heavy for their power, and vibrate too much to be of much use. That takes us to about 75-80" wingspan aircraft. Is there consensus on the use of smaller gas engines in the 1.20-1.80 (glow) sized aircraft?

What are the better engine choices?

I would like to avoid the mess of glow, without the relative performance penalty of electric, and hence the 20-34cc sized gas engines seem attractive.

Any advice?

Thanks

What type of airframe are you talking about,there are many engines to choose,depends on flying style or frame,good luck.

yeah man fill us in hopefully for that size motor u r only intrested in flying scale type of stuff then we can hook u up if u want to 3d def. let us know that fact[8D]

Not sure what experience your friends have with small gassers that would lead them to make those statements. True, power to weight ratios of most large glow engines will exceed that of most small gassers but the drawbacks of glow power in the 1.20 and up catagory pretty much even the playing field. Also, as far as single cylinder gassers go for the most part the bigger they are the more vibration they tend to have. I've had great results with 26cc engines in scale aerobatic aircraft up to 78" wing span and 12-1/2 pounds. If 3-D is your bag you will want to keep the weight down to around 10 pounds. Many 1.20-1.50 sized aircraft can fit in this category. As far as choices, there are many, Zenoha, CRRC, SPE, XYZ, RCGF, to name a few. Search the threads, there is no shortage of opinions, or reviews on all of them. I do reccomend that you contact a US based dealer and talk to them before you buy, they will be your source for post purchase support down the road.

Jody

Forgotten were MVVS and 3w in the 26 to 28cc class.

[sm=thumbs_up.gif]And a partridge in a pear tree[sm=wink_smile.gif]

I disagree. A G-26 in a .90 size model is a lot of power.

Vibrate? Yep. Kind of like a single-cylinder.


The 43cc in my 1.60 size Ultimate is a beautiful match-up.



Edit:
Removed foul language

Guys - thanks for your insights. I'm mostly a sport / scale flyer, so a few ounces of weight one way or the other is tolerable. I thank you for your responses.

If you desire best power/weight ratio in your models as a gasser, I'd recommend looking into EVO/MVVS 26cc engines. Light, powerful, same size and similar weight as a 160 sized glow engine without the drawbacks. Also they exceed expectations with a tuned pipe.. The only drawback is their price.

For scale, sport flight, the heavy, a little pricy, but dead-reliable Zenoah engines are very good choices..

Chinese CRRC (cermark sells them) 26cc is also a very good engine for its price. (Its also sold in Hobbycity)

I'm flying a 27% Giles 202 (70" span) with a Zenoah 26 magneto and loving it. It's smooth, plenty of power, and sounds great. It won't do 3D, but I'm not interested in that anyway. For sports flying and scale aerobatics it's perfect.