Dears,
I bought the GB Extra 330 ARF, and my first option for the engine is the DLE 55cc from hobby City but I really don't have any experience with gas engines and I don't know if this is a good engine or not, there's good reviews for the DL50 but this one is still new, also will this engine be so big for the plane? another thing; why this engine has a low RPM (7500) less than any other 50cc engine?

My second option for the engine is the Turnigy HP50,

I also I'm planing to use the Futaba S3305 High-Torque Standard Servo w/Metal Gears , are they any good? bare in mind that I do some 3d (hovering, knife edge, spins, inverted, etc..)

Kindly I need your help to make my desicion.

Thanks.

If You wanted a plane that will 3D then that plane is a little small on the wing area need something more like this http://www.extremeflightrc.com/html/50ccExtra.html.

The DLE is a very good choice for the 50 cc planes, IMHO the best for the money I have 3 and they are great.

Do you think that the DLE 55 will be too much for my airframe? as its a 55cc and 5.5HP

Carl Goldberg Extra 330 ARF

Wingspan: 77"
Wing Area: 1118 Sq. In.
Fuse Length: 67½"
Flying Weight: 13-14 lbs.
Power: 1.20 - 2.2 2-Stroke
1.20 - 1.80 4-Stroke
1.2 - 2.4 Gas
Radio: 4 - Channel Radio
8 - Standard Servos

I say go for and use a little throttle management.